buildscripts/winbuild.sh

@@ -72,6 +72,8 @@ function install_python(){
         wine python -m pip install pytools==2020.2
 	echo "Upgrading pip"
 	wine python -m pip install --upgrade pip
+	# install pypiwin32 for win32com
+	wine python -m pip install pypiwin32
 }
 
 function install_pyqt(){
@@ -82,6 +84,8 @@ function install_pyqt(){
 		echo "Installing PyQt-${PYQT_VERSION} 32b"
 		wine PyQt${PYQT_VERSION}-x32.exe /S /WX
 	fi
+	# and qtpy
+	wine python -m pip install qtpy
 }
 
 function install_openssl(){

docs/conf.py

@@ -216,8 +216,7 @@ autodoc_mock_imports = [
     'pkg_resources',
     'pycanberra',
     'pyopencl',
-    'PyQt4',
-    'PyQt5',
+    'qtpy',
     'qrcode',
     'stem',
     'xdg',

packages/AppImage/PyBitmessage.yml

@@ -11,11 +11,13 @@ ingredients:
     - python-msgpack
     - python-qrcode
     - python-qt4
+    - python-qtpy
     - python-setuptools
     - python-sip
     - python-six
     - python-xdg
     - sni-qt
+    - xkb-data
   exclude:
     - libdb5.3
     - libglib2.0-0

packages/collectd/pybitmessagestatus.py

@@ -2,7 +2,7 @@
 
 import collectd
 import json
-import xmlrpclib
+from six.moves import xmlrpc_client as xmlrpclib
 
 pybmurl = ""
 api = ""

packages/pyinstaller/bitmessagemain.spec

@@ -43,8 +43,16 @@ a = Analysis(
         'setuptools.msvc', '_cffi_backend',
         'plugins.menu_qrcode', 'plugins.proxyconfig_stem'
     ],
-    runtime_hooks=[os.path.join(hookspath, 'pyinstaller_rthook_plugins.py')],
-    excludes=excludes
+    # https://github.com/pyinstaller/pyinstaller/wiki/Recipe-PyQt4-API-Version
+    runtime_hooks = [
+        os.path.join(hookspath, hook) for hook in (
+            'pyinstaller_rthook_pyqt4.py',
+            'pyinstaller_rthook_plugins.py'
+        )],
+    excludes += [
+        'PyQt4.QtOpenGL','PyQt4.QtSql',
+        'PyQt4.QtSvg', 'PyQt4.QtTest', 'PyQt4.QtWebKit', 'PyQt4.QtXml',
+        'win32ui']
 )
 
 
@@ -90,9 +98,8 @@ a.datas += addTranslations()
 a.datas += [('default.ini', os.path.join(srcPath, 'default.ini'), 'DATA')]
 
 excluded_binaries = [
-    'QtOpenGL4.dll',
-    'QtSvg4.dll',
-    'QtXml4.dll',
+    'QtOpenGL4.dll', 'QtSql4.dll', 'QtSvg4.dll', 'QtTest4.dll',
+    'QtWebKit4.dll', 'QtXml4.dll'
 ]
 a.binaries = TOC([x for x in a.binaries if x[0] not in excluded_binaries])
 

packages/pyinstaller/hooks/pyinstaller_rthook_pyqt4.py

@@ -0,0 +1,10 @@
+# https://github.com/pyinstaller/pyinstaller/wiki/Recipe-PyQt4-API-Version
+import sip
+
+sip.setapi(u'QDate', 2)
+sip.setapi(u'QDateTime', 2)
+sip.setapi(u'QString', 2)
+sip.setapi(u'QTextStream', 2)
+sip.setapi(u'QTime', 2)
+sip.setapi(u'QUrl', 2)
+sip.setapi(u'QVariant', 2)

py3start.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+python3 pybitmessage/bitmessagemain.py "$@"

revert_blob_to_text.sh

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+python3 pybitmessage/revert_blob_to_text.py "$@"

setup.py

@@ -4,6 +4,7 @@ import os
 import platform
 import shutil
 import sys
+import six
 
 from importlib import import_module
 from setuptools import setup, Extension
@@ -83,7 +84,7 @@ if __name__ == "__main__":
         'images/kivy/text_images*.png'
     ]}
 
-    if sys.version_info[0] == 3:
+    if six.PY3:
         packages.extend(
             [
                 'pybitmessage.bitmessagekivy',

src/addresses.py

@@ -187,7 +187,7 @@ def decodeAddress(address):
         integer = decodeBase58(address)
     if integer == 0:
         status = 'invalidcharacters'
-        return status, 0, 0, ''
+        return status, 0, 0, b''
     # after converting to hex, the string will be prepended
     # with a 0x and appended with a L in python2
     hexdata = hex(integer)[2:].rstrip('L')
@@ -200,23 +200,23 @@ def decodeAddress(address):
 
     if checksum != double_sha512(data[:-4])[0:4]:
         status = 'checksumfailed'
-        return status, 0, 0, ''
+        return status, 0, 0, b''
 
     try:
         addressVersionNumber, bytesUsedByVersionNumber = decodeVarint(data[:9])
     except varintDecodeError as e:
         logger.error(str(e))
         status = 'varintmalformed'
-        return status, 0, 0, ''
+        return status, 0, 0, b''
 
     if addressVersionNumber > 4:
         logger.error('cannot decode address version numbers this high')
         status = 'versiontoohigh'
-        return status, 0, 0, ''
+        return status, 0, 0, b''
     elif addressVersionNumber == 0:
         logger.error('cannot decode address version numbers of zero.')
         status = 'versiontoohigh'
-        return status, 0, 0, ''
+        return status, 0, 0, b''
 
     try:
         streamNumber, bytesUsedByStreamNumber = \
@@ -224,7 +224,7 @@ def decodeAddress(address):
     except varintDecodeError as e:
         logger.error(str(e))
         status = 'varintmalformed'
-        return status, 0, 0, ''
+        return status, 0, 0, b''
 
     status = 'success'
     if addressVersionNumber == 1:
@@ -242,21 +242,21 @@ def decodeAddress(address):
             return status, addressVersionNumber, streamNumber, \
                 b'\x00\x00' + embeddedRipeData
         elif len(embeddedRipeData) < 18:
-            return 'ripetooshort', 0, 0, ''
+            return 'ripetooshort', 0, 0, b''
         elif len(embeddedRipeData) > 20:
-            return 'ripetoolong', 0, 0, ''
-        return 'otherproblem', 0, 0, ''
+            return 'ripetoolong', 0, 0, b''
+        return 'otherproblem', 0, 0, b''
     elif addressVersionNumber == 4:
         embeddedRipeData = \
             data[bytesUsedByVersionNumber + bytesUsedByStreamNumber:-4]
         if embeddedRipeData[0:1] == b'\x00':
             # In order to enforce address non-malleability, encoded
             # RIPE data must have NULL bytes removed from the front
-            return 'encodingproblem', 0, 0, ''
+            return 'encodingproblem', 0, 0, b''
         elif len(embeddedRipeData) > 20:
-            return 'ripetoolong', 0, 0, ''
+            return 'ripetoolong', 0, 0, b''
         elif len(embeddedRipeData) < 4:
-            return 'ripetooshort', 0, 0, ''
+            return 'ripetooshort', 0, 0, b''
         x00string = b'\x00' * (20 - len(embeddedRipeData))
         return status, addressVersionNumber, streamNumber, \
             x00string + embeddedRipeData

src/api.py

@@ -67,9 +67,12 @@ import subprocess  # nosec B404
 import time
 from binascii import hexlify, unhexlify
 from struct import pack, unpack
+import sqlite3
 
 import six
 from six.moves import configparser, http_client, xmlrpc_server
+from six.moves.reprlib import repr
+from dbcompat import dbstr
 
 import helper_inbox
 import helper_sent
@@ -531,12 +534,12 @@ class BMRPCDispatcher(object):
         message = shared.fixPotentiallyInvalidUTF8Data(message)
         return {
             'msgid': hexlify(msgid),
-            'toAddress': toAddress,
-            'fromAddress': fromAddress,
+            'toAddress': toAddress.decode("utf-8", "replace"),
+            'fromAddress': fromAddress.decode("utf-8", "replace"),
             'subject': base64.b64encode(subject),
             'message': base64.b64encode(message),
             'encodingType': encodingtype,
-            'receivedTime': received,
+            'receivedTime': received.decode("utf-8", "replace"),
             'read': read
         }
 
@@ -598,11 +601,12 @@ class BMRPCDispatcher(object):
         """
         queryreturn = sqlQuery(
             "SELECT label, address from addressbook WHERE label = ?",
-            label
+            dbstr(label)
         ) if label else sqlQuery("SELECT label, address from addressbook")
         data = []
         for label, address in queryreturn:
             label = shared.fixPotentiallyInvalidUTF8Data(label)
+            address = address.decode("utf-8", "replace")
             data.append({
                 'label': base64.b64encode(label),
                 'address': address
@@ -618,12 +622,12 @@ class BMRPCDispatcher(object):
         self._verifyAddress(address)
         # TODO: add unique together constraint in the table
         queryreturn = sqlQuery(
-            "SELECT address FROM addressbook WHERE address=?", address)
+            "SELECT address FROM addressbook WHERE address=?", dbstr(address))
         if queryreturn != []:
             raise APIError(
                 16, 'You already have this address in your address book.')
 
-        sqlExecute("INSERT INTO addressbook VALUES(?,?)", label, address)
+        sqlExecute("INSERT INTO addressbook VALUES(?,?)", dbstr(label), dbstr(address))
         queues.UISignalQueue.put(('rerenderMessagelistFromLabels', ''))
         queues.UISignalQueue.put(('rerenderMessagelistToLabels', ''))
         queues.UISignalQueue.put(('rerenderAddressBook', ''))
@@ -635,7 +639,7 @@ class BMRPCDispatcher(object):
         """Delete an entry from address book."""
         address = addBMIfNotPresent(address)
         self._verifyAddress(address)
-        sqlExecute('DELETE FROM addressbook WHERE address=?', address)
+        sqlExecute('DELETE FROM addressbook WHERE address=?', dbstr(address))
         queues.UISignalQueue.put(('rerenderMessagelistFromLabels', ''))
         queues.UISignalQueue.put(('rerenderMessagelistToLabels', ''))
         queues.UISignalQueue.put(('rerenderAddressBook', ''))
@@ -919,6 +923,7 @@ class BMRPCDispatcher(object):
             " ORDER BY received"
         )
         return {"inboxMessages": [
+
             self._dump_inbox_message(*data) for data in queryreturn
         ]}
 
@@ -953,20 +958,32 @@ class BMRPCDispatcher(object):
                     23, 'Bool expected in readStatus, saw %s instead.'
                     % type(readStatus))
             queryreturn = sqlQuery(
-                "SELECT read FROM inbox WHERE msgid=?", msgid)
+                "SELECT read FROM inbox WHERE msgid=?", sqlite3.Binary(msgid))
+            if len(queryreturn) < 1:
+                queryreturn = sqlQuery(
+                    "SELECT read FROM inbox WHERE msgid=CAST(? AS TEXT)", msgid)
             # UPDATE is slow, only update if status is different
             try:
                 if (queryreturn[0][0] == 1) != readStatus:
-                    sqlExecute(
+                    rowcount = sqlExecute(
                         "UPDATE inbox set read = ? WHERE msgid=?",
-                        readStatus, msgid)
+                        readStatus, sqlite3.Binary(msgid))
+                    if rowcount < 1:
+                        rowcount = sqlExecute(
+                            "UPDATE inbox set read = ? WHERE msgid=CAST(? AS TEXT)",
+                            readStatus, msgid)
                     queues.UISignalQueue.put(('changedInboxUnread', None))
             except IndexError:
                 pass
         queryreturn = sqlQuery(
             "SELECT msgid, toaddress, fromaddress, subject, received, message,"
-            " encodingtype, read FROM inbox WHERE msgid=?", msgid
+            " encodingtype, read FROM inbox WHERE msgid=?", sqlite3.Binary(msgid)
         )
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT msgid, toaddress, fromaddress, subject, received, message,"
+                " encodingtype, read FROM inbox WHERE msgid=CAST(? AS TEXT)", msgid
+            )
         try:
             return {"inboxMessage": [
                 self._dump_inbox_message(*queryreturn[0])]}
@@ -1018,7 +1035,7 @@ class BMRPCDispatcher(object):
         queryreturn = sqlQuery(
             "SELECT msgid, toaddress, fromaddress, subject, received,"
             " message, encodingtype, read FROM inbox WHERE folder='inbox'"
-            " AND toAddress=?", toAddress)
+            " AND toAddress=?", dbstr(toAddress))
         return {"inboxMessages": [
             self._dump_inbox_message(*data) for data in queryreturn
         ]}
@@ -1035,8 +1052,14 @@ class BMRPCDispatcher(object):
         queryreturn = sqlQuery(
             "SELECT msgid, toaddress, fromaddress, subject, lastactiontime,"
             " message, encodingtype, status, ackdata FROM sent WHERE msgid=?",
-            msgid
+            sqlite3.Binary(msgid)
         )
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT msgid, toaddress, fromaddress, subject, lastactiontime,"
+                " message, encodingtype, status, ackdata FROM sent WHERE msgid=CAST(? AS TEXT)",
+                msgid
+            )
         try:
             return {"sentMessage": [
                 self._dump_sent_message(*queryreturn[0])
@@ -1055,7 +1078,7 @@ class BMRPCDispatcher(object):
             "SELECT msgid, toaddress, fromaddress, subject, lastactiontime,"
             " message, encodingtype, status, ackdata FROM sent"
             " WHERE folder='sent' AND fromAddress=? ORDER BY lastactiontime",
-            fromAddress
+            dbstr(fromAddress)
         )
         return {"sentMessages": [
             self._dump_sent_message(*data) for data in queryreturn
@@ -1072,8 +1095,14 @@ class BMRPCDispatcher(object):
         queryreturn = sqlQuery(
             "SELECT msgid, toaddress, fromaddress, subject, lastactiontime,"
             " message, encodingtype, status, ackdata FROM sent"
-            " WHERE ackdata=?", ackData
+            " WHERE ackdata=?", sqlite3.Binary(ackData)
         )
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT msgid, toaddress, fromaddress, subject, lastactiontime,"
+                " message, encodingtype, status, ackdata FROM sent"
+                " WHERE ackdata=CAST(? AS TEXT)", ackData
+            )
 
         try:
             return {"sentMessage": [
@@ -1093,7 +1122,9 @@ class BMRPCDispatcher(object):
         # Trash if in inbox table
         helper_inbox.trash(msgid)
         # Trash if in sent table
-        sqlExecute("UPDATE sent SET folder='trash' WHERE msgid=?", msgid)
+        rowcount = sqlExecute("UPDATE sent SET folder='trash' WHERE msgid=?", sqlite3.Binary(msgid))
+        if rowcount < 1:
+            sqlExecute("UPDATE sent SET folder='trash' WHERE msgid=CAST(? AS TEXT)", msgid)
         return 'Trashed message (assuming message existed).'
 
     @command('trashInboxMessage')
@@ -1107,7 +1138,9 @@ class BMRPCDispatcher(object):
     def HandleTrashSentMessage(self, msgid):
         """Trash sent message by msgid (encoded in hex)."""
         msgid = self._decode(msgid, "hex")
-        sqlExecute('''UPDATE sent SET folder='trash' WHERE msgid=?''', msgid)
+        rowcount = sqlExecute('''UPDATE sent SET folder='trash' WHERE msgid=?''', sqlite3.Binary(msgid))
+        if rowcount < 1:
+            sqlExecute('''UPDATE sent SET folder='trash' WHERE msgid=CAST(? AS TEXT)''', msgid)
         return 'Trashed sent message (assuming message existed).'
 
     @command('sendMessage')
@@ -1150,9 +1183,9 @@ class BMRPCDispatcher(object):
 
         toLabel = ''
         queryreturn = sqlQuery(
-            "SELECT label FROM addressbook WHERE address=?", toAddress)
+            "SELECT label FROM addressbook WHERE address=?", dbstr(toAddress))
         try:
-            toLabel = queryreturn[0][0]
+            toLabel = queryreturn[0][0].decode("utf-8", "replace")
         except IndexError:
             pass
 
@@ -1217,9 +1250,12 @@ class BMRPCDispatcher(object):
             raise APIError(15, 'Invalid ackData object size.')
         ackdata = self._decode(ackdata, "hex")
         queryreturn = sqlQuery(
-            "SELECT status FROM sent where ackdata=?", ackdata)
+            "SELECT status FROM sent where ackdata=?", sqlite3.Binary(ackdata))
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT status FROM sent where ackdata=CAST(? AS TEXT)", ackdata)
         try:
-            return queryreturn[0][0]
+            return queryreturn[0][0].decode("utf-8", "replace")
         except IndexError:
             return 'notfound'
 
@@ -1238,11 +1274,11 @@ class BMRPCDispatcher(object):
         # First we must check to see if the address is already in the
         # subscriptions list.
         queryreturn = sqlQuery(
-            "SELECT * FROM subscriptions WHERE address=?", address)
+            "SELECT * FROM subscriptions WHERE address=?", dbstr(address))
         if queryreturn:
             raise APIError(16, 'You are already subscribed to that address.')
         sqlExecute(
-            "INSERT INTO subscriptions VALUES (?,?,?)", label, address, True)
+            "INSERT INTO subscriptions VALUES (?,?,?)", dbstr(label), dbstr(address), True)
         shared.reloadBroadcastSendersForWhichImWatching()
         queues.UISignalQueue.put(('rerenderMessagelistFromLabels', ''))
         queues.UISignalQueue.put(('rerenderSubscriptions', ''))
@@ -1256,7 +1292,7 @@ class BMRPCDispatcher(object):
         """
 
         address = addBMIfNotPresent(address)
-        sqlExecute("DELETE FROM subscriptions WHERE address=?", address)
+        sqlExecute("DELETE FROM subscriptions WHERE address=?", dbstr(address))
         shared.reloadBroadcastSendersForWhichImWatching()
         queues.UISignalQueue.put(('rerenderMessagelistFromLabels', ''))
         queues.UISignalQueue.put(('rerenderSubscriptions', ''))
@@ -1274,6 +1310,7 @@ class BMRPCDispatcher(object):
         data = []
         for label, address, enabled in queryreturn:
             label = shared.fixPotentiallyInvalidUTF8Data(label)
+            address = address.decode("utf-8", "replace")
             data.append({
                 'label': base64.b64encode(label),
                 'address': address,
@@ -1354,7 +1391,9 @@ class BMRPCDispatcher(object):
         """Trash a sent message by ackdata (hex encoded)"""
         # This API method should only be used when msgid is not available
         ackdata = self._decode(ackdata, "hex")
-        sqlExecute("UPDATE sent SET folder='trash' WHERE ackdata=?", ackdata)
+        rowcount = sqlExecute("UPDATE sent SET folder='trash' WHERE ackdata=?", sqlite3.Binary(ackdata))
+        if rowcount < 1:
+            sqlExecute("UPDATE sent SET folder='trash' WHERE ackdata=CAST(? AS TEXT)", ackdata)
         return 'Trashed sent message (assuming message existed).'
 
     @command('disseminatePubkey')
@@ -1421,19 +1460,29 @@ class BMRPCDispatcher(object):
         # use it we'll need to fill out a field in our inventory database
         # which is blank by default (first20bytesofencryptedmessage).
         queryreturn = sqlQuery(
-            "SELECT hash, payload FROM inventory WHERE tag = ''"
-            " and objecttype = 2")
+            "SELECT hash, payload FROM inventory WHERE tag = ?"
+            " and objecttype = 2", sqlite3.Binary(b""))
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT hash, payload FROM inventory WHERE tag = CAST(? AS TEXT)"
+                " and objecttype = 2", b"")
         with SqlBulkExecute() as sql:
             for hash01, payload in queryreturn:
                 readPosition = 16  # Nonce length + time length
                 # Stream Number length
                 readPosition += decodeVarint(
                     payload[readPosition:readPosition + 10])[1]
-                t = (payload[readPosition:readPosition + 32], hash01)
-                sql.execute("UPDATE inventory SET tag=? WHERE hash=?", *t)
+                t = (sqlite3.Binary(payload[readPosition:readPosition + 32]), sqlite3.Binary(hash01))
+                _, rowcount = sql.execute("UPDATE inventory SET tag=? WHERE hash=?", *t)
+                if rowcount < 1:
+                    t = (sqlite3.Binary(payload[readPosition:readPosition + 32]), hash01)
+                    sql.execute("UPDATE inventory SET tag=? WHERE hash=CAST(? AS TEXT)", *t)
 
         queryreturn = sqlQuery(
-            "SELECT payload FROM inventory WHERE tag = ?", requestedHash)
+            "SELECT payload FROM inventory WHERE tag = ?", sqlite3.Binary(requestedHash))
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT payload FROM inventory WHERE tag = CAST(? AS TEXT)", requestedHash)
         return {"receivedMessageDatas": [
             {'data': hexlify(payload)} for payload, in queryreturn
         ]}

src/bitmessagecli.py

@@ -21,7 +21,8 @@ import os
 import socket
 import sys
 import time
-import xmlrpclib
+from six.moves import xmlrpc_client as xmlrpclib
+from six.moves import input as raw_input
 
 from bmconfigparser import config
 

src/bitmessagecurses/__init__.py

@@ -10,13 +10,15 @@ Bitmessage commandline interface
 #     * python2-pythondialog
 #  * dialog
 
-import ConfigParser
+from six.moves import configparser
 import curses
 import os
 import sys
 import time
 from textwrap import fill
 from threading import Timer
+import six
+import sqlite3
 
 from dialog import Dialog
 import helper_sent
@@ -30,6 +32,7 @@ import state
 from addresses import addBMIfNotPresent, decodeAddress
 from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
+from dbcompat import dbstr
 
 # pylint: disable=global-statement
 
@@ -105,7 +108,7 @@ def ascii(s):
     """ASCII values"""
     r = ""
     for c in s:
-        if ord(c) in range(128):
+        if six.byte2int(c) in range(128):
             r += c
     return r
 
@@ -326,13 +329,13 @@ def handlech(c, stdscr):
     if c != curses.ERR:
         global inboxcur, addrcur, sentcur, subcur, abookcur, blackcur
         if c in range(256):
-            if chr(c) in '12345678':
+            if six.int2byte(c) in '12345678':
                 global menutab
-                menutab = int(chr(c))
-            elif chr(c) == 'q':
+                menutab = int(six.int2byte(c))
+            elif six.int2byte(c) == 'q':
                 global quit_
                 quit_ = True
-            elif chr(c) == '\n':
+            elif six.int2byte(c) == '\n':
                 curses.curs_set(1)
                 d = Dialog(dialog="dialog")
                 if menutab == 1:
@@ -358,7 +361,9 @@ def handlech(c, stdscr):
                                 inbox[inboxcur][1] +
                                 "\"")
                             data = ""       # pyint: disable=redefined-outer-name
-                            ret = sqlQuery("SELECT message FROM inbox WHERE msgid=?", inbox[inboxcur][0])
+                            ret = sqlQuery("SELECT message FROM inbox WHERE msgid=?", sqlite3.Binary(inbox[inboxcur][0]))
+                            if len(ret) < 1:
+                                ret = sqlQuery("SELECT message FROM inbox WHERE msgid=CAST(? AS TEXT)", inbox[inboxcur][0])
                             if ret != []:
                                 for row in ret:
                                     data, = row
@@ -367,12 +372,16 @@ def handlech(c, stdscr):
                                 for i, item in enumerate(data.split("\n")):
                                     msg += fill(item, replace_whitespace=False) + "\n"
                                 scrollbox(d, unicode(ascii(msg)), 30, 80)
-                                sqlExecute("UPDATE inbox SET read=1 WHERE msgid=?", inbox[inboxcur][0])
+                                rowcount = sqlExecute("UPDATE inbox SET read=1 WHERE msgid=?", sqlite3.Binary(inbox[inboxcur][0]))
+                                if rowcount < 1:
+                                    sqlExecute("UPDATE inbox SET read=1 WHERE msgid=CAST(? AS TEXT)", inbox[inboxcur][0])
                                 inbox[inboxcur][7] = 1
                             else:
                                 scrollbox(d, unicode("Could not fetch message."))
                         elif t == "2":       # Mark unread
-                            sqlExecute("UPDATE inbox SET read=0 WHERE msgid=?", inbox[inboxcur][0])
+                            rowcount = sqlExecute("UPDATE inbox SET read=0 WHERE msgid=?", sqlite3.Binary(inbox[inboxcur][0]))
+                            if rowcount < 1:
+                                sqlExecute("UPDATE inbox SET read=0 WHERE msgid=CAST(? AS TEXT)", inbox[inboxcur][0])
                             inbox[inboxcur][7] = 0
                         elif t == "3":       # Reply
                             curses.curs_set(1)
@@ -396,11 +405,14 @@ def handlech(c, stdscr):
                             if not m[5][:4] == "Re: ":
                                 subject = "Re: " + m[5]
                             body = ""
-                            ret = sqlQuery("SELECT message FROM inbox WHERE msgid=?", m[0])
+                            ret = sqlQuery("SELECT message FROM inbox WHERE msgid=?", sqlite3.Binary(m[0]))
+                            if len(ret) < 1:
+                                ret = sqlQuery("SELECT message FROM inbox WHERE msgid=CAST(? AS TEXT)", m[0])
                             if ret != []:
                                 body = "\n\n------------------------------------------------------\n"
                                 for row in ret:
                                     body, = row
+                                body = body.decode("utf-8", "replace")
 
                             sendMessage(fromaddr, toaddr, ischan, subject, body, True)
                             dialogreset(stdscr)
@@ -410,7 +422,7 @@ def handlech(c, stdscr):
                                 r, t = d.inputbox("Label for address \"" + addr + "\"")
                                 if r == d.DIALOG_OK:
                                     label = t
-                                    sqlExecute("INSERT INTO addressbook VALUES (?,?)", label, addr)
+                                    sqlExecute("INSERT INTO addressbook VALUES (?,?)", dbstr(label), dbstr(addr))
                                     # Prepend entry
                                     addrbook.reverse()
                                     addrbook.append([label, addr])
@@ -422,17 +434,22 @@ def handlech(c, stdscr):
                             r, t = d.inputbox("Filename", init=inbox[inboxcur][5] + ".txt")
                             if r == d.DIALOG_OK:
                                 msg = ""
-                                ret = sqlQuery("SELECT message FROM inbox WHERE msgid=?", inbox[inboxcur][0])
+                                ret = sqlQuery("SELECT message FROM inbox WHERE msgid=?", sqlite3.Binary(inbox[inboxcur][0]))
+                                if len(ret) < 1:
+                                    ret = sqlQuery("SELECT message FROM inbox WHERE msgid=CAST(? AS TEXT)", inbox[inboxcur][0])
                                 if ret != []:
                                     for row in ret:
                                         msg, = row
+                                    msg = msg.decode("utf-8", "replace")
                                     fh = open(t, "a")       # Open in append mode just in case
                                     fh.write(msg)
                                     fh.close()
                                 else:
                                     scrollbox(d, unicode("Could not fetch message."))
                         elif t == "6":       # Move to trash
-                            sqlExecute("UPDATE inbox SET folder='trash' WHERE msgid=?", inbox[inboxcur][0])
+                            rowcount = sqlExecute("UPDATE inbox SET folder='trash' WHERE msgid=?", sqlite3.Binary(inbox[inboxcur][0]))
+                            if rowcount < 1:
+                                sqlExecute("UPDATE inbox SET folder='trash' WHERE msgid=CAST(? AS TEXT)", inbox[inboxcur][0])
                             del inbox[inboxcur]
                             scrollbox(d, unicode(
                                 "Message moved to trash. There is no interface to view your trash,"
@@ -463,8 +480,13 @@ def handlech(c, stdscr):
                             data = ""
                             ret = sqlQuery(
                                 "SELECT message FROM sent WHERE subject=? AND ackdata=?",
-                                sentbox[sentcur][4],
-                                sentbox[sentcur][6])
+                                dbstr(sentbox[sentcur][4]),
+                                sqlite3.Binary(sentbox[sentcur][6]))
+                            if len(ret) < 1:
+                                ret = sqlQuery(
+                                    "SELECT message FROM sent WHERE subject=? AND ackdata=CAST(? AS TEXT)",
+                                    dbstr(sentbox[sentcur][4]),
+                                    sentbox[sentcur][6])
                             if ret != []:
                                 for row in ret:
                                     data, = row
@@ -476,10 +498,15 @@ def handlech(c, stdscr):
                             else:
                                 scrollbox(d, unicode("Could not fetch message."))
                         elif t == "2":       # Move to trash
-                            sqlExecute(
+                            rowcount = sqlExecute(
                                 "UPDATE sent SET folder='trash' WHERE subject=? AND ackdata=?",
-                                sentbox[sentcur][4],
-                                sentbox[sentcur][6])
+                                dbstr(sentbox[sentcur][4]),
+                                sqlite3.Binary(sentbox[sentcur][6]))
+                            if rowcount < 1:
+                                rowcount = sqlExecute(
+                                    "UPDATE sent SET folder='trash' WHERE subject=? AND ackdata=CAST(? AS TEXT)",
+                                    dbstr(sentbox[sentcur][4]),
+                                    sentbox[sentcur][6])
                             del sentbox[sentcur]
                             scrollbox(d, unicode(
                                 "Message moved to trash. There is no interface to view your trash"
@@ -672,7 +699,7 @@ def handlech(c, stdscr):
                                     elif t == "2" and m is False:
                                         try:
                                             mn = config.get(a, "mailinglistname")
-                                        except ConfigParser.NoOptionError:
+                                        except configparser.NoOptionError:
                                             mn = ""
                                         r, t = d.inputbox("Mailing list name", init=mn)
                                         if r == d.DIALOG_OK:
@@ -711,29 +738,29 @@ def handlech(c, stdscr):
                                         subscriptions.append([label, addr, True])
                                         subscriptions.reverse()
 
-                                        sqlExecute("INSERT INTO subscriptions VALUES (?,?,?)", label, addr, True)
+                                        sqlExecute("INSERT INTO subscriptions VALUES (?,?,?)", dbstr(label), dbstr(addr), True)
                                         shared.reloadBroadcastSendersForWhichImWatching()
                         elif t == "2":
                             r, t = d.inputbox("Type in \"I want to delete this subscription\"")
                             if r == d.DIALOG_OK and t == "I want to delete this subscription":
                                 sqlExecute(
                                     "DELETE FROM subscriptions WHERE label=? AND address=?",
-                                    subscriptions[subcur][0],
-                                    subscriptions[subcur][1])
+                                    dbstr(subscriptions[subcur][0]),
+                                    dbstr(subscriptions[subcur][1]))
                                 shared.reloadBroadcastSendersForWhichImWatching()
                                 del subscriptions[subcur]
                         elif t == "3":
                             sqlExecute(
                                 "UPDATE subscriptions SET enabled=1 WHERE label=? AND address=?",
-                                subscriptions[subcur][0],
-                                subscriptions[subcur][1])
+                                dbstr(subscriptions[subcur][0]),
+                                dbstr(subscriptions[subcur][1]))
                             shared.reloadBroadcastSendersForWhichImWatching()
                             subscriptions[subcur][2] = True
                         elif t == "4":
                             sqlExecute(
                                 "UPDATE subscriptions SET enabled=0 WHERE label=? AND address=?",
-                                subscriptions[subcur][0],
-                                subscriptions[subcur][1])
+                                dbstr(subscriptions[subcur][0]),
+                                dbstr(subscriptions[subcur][1]))
                             shared.reloadBroadcastSendersForWhichImWatching()
                             subscriptions[subcur][2] = False
                 elif menutab == 6:
@@ -762,7 +789,7 @@ def handlech(c, stdscr):
                                 subscriptions.append([label, addr, True])
                                 subscriptions.reverse()
 
-                                sqlExecute("INSERT INTO subscriptions VALUES (?,?,?)", label, addr, True)
+                                sqlExecute("INSERT INTO subscriptions VALUES (?,?,?)", dbstr(label), dbstr(addr), True)
                                 shared.reloadBroadcastSendersForWhichImWatching()
                         elif t == "3":
                             r, t = d.inputbox("Input new address")
@@ -771,7 +798,7 @@ def handlech(c, stdscr):
                                 if addr not in [item[1] for i, item in enumerate(addrbook)]:
                                     r, t = d.inputbox("Label for address \"" + addr + "\"")
                                     if r == d.DIALOG_OK:
-                                        sqlExecute("INSERT INTO addressbook VALUES (?,?)", t, addr)
+                                        sqlExecute("INSERT INTO addressbook VALUES (?,?)", dbstr(t), dbstr(addr))
                                         # Prepend entry
                                         addrbook.reverse()
                                         addrbook.append([t, addr])
@@ -783,8 +810,8 @@ def handlech(c, stdscr):
                             if r == d.DIALOG_OK and t == "I want to delete this Address Book entry":
                                 sqlExecute(
                                     "DELETE FROM addressbook WHERE label=? AND address=?",
-                                    addrbook[abookcur][0],
-                                    addrbook[abookcur][1])
+                                    dbstr(addrbook[abookcur][0]),
+                                    dbstr(addrbook[abookcur][1]))
                                 del addrbook[abookcur]
                 elif menutab == 7:
                     set_background_title(d, "Blacklist Dialog Box")
@@ -800,20 +827,20 @@ def handlech(c, stdscr):
                             if r == d.DIALOG_OK and t == "I want to delete this Blacklist entry":
                                 sqlExecute(
                                     "DELETE FROM blacklist WHERE label=? AND address=?",
-                                    blacklist[blackcur][0],
-                                    blacklist[blackcur][1])
+                                    dbstr(blacklist[blackcur][0]),
+                                    dbstr(blacklist[blackcur][1]))
                                 del blacklist[blackcur]
                         elif t == "2":
                             sqlExecute(
                                 "UPDATE blacklist SET enabled=1 WHERE label=? AND address=?",
-                                blacklist[blackcur][0],
-                                blacklist[blackcur][1])
+                                dbstr(blacklist[blackcur][0]),
+                                dbstr(blacklist[blackcur][1]))
                             blacklist[blackcur][2] = True
                         elif t == "3":
                             sqlExecute(
                                 "UPDATE blacklist SET enabled=0 WHERE label=? AND address=?",
-                                blacklist[blackcur][0],
-                                blacklist[blackcur][1])
+                                dbstr(blacklist[blackcur][0]),
+                                dbstr(blacklist[blackcur][1]))
                             blacklist[blackcur][2] = False
                 dialogreset(stdscr)
         else:
@@ -991,10 +1018,13 @@ def loadInbox():
     ret = sqlQuery("""SELECT msgid, toaddress, fromaddress, subject, received, read
         FROM inbox WHERE folder='inbox' AND %s LIKE ?
         ORDER BY received
-        """ % (where,), what)
+        """ % (where,), dbstr(what))
     for row in ret:
         msgid, toaddr, fromaddr, subject, received, read = row
+        toaddr = toaddr.decode("utf-8", "replace")
+        fromaddr = fromaddr.decode("utf-8", "replace")
         subject = ascii(shared.fixPotentiallyInvalidUTF8Data(subject))
+        received = received.decode("utf-8", "replace")
 
         # Set label for to address
         try:
@@ -1013,18 +1043,19 @@ def loadInbox():
         if config.has_section(fromaddr):
             fromlabel = config.get(fromaddr, "label")
         if fromlabel == "":         # Check Address Book
-            qr = sqlQuery("SELECT label FROM addressbook WHERE address=?", fromaddr)
+            qr = sqlQuery("SELECT label FROM addressbook WHERE address=?", dbstr(fromaddr))
             if qr != []:
                 for r in qr:
                     fromlabel, = r
+                fromlabel = shared.fixPotentiallyInvalidUTF8Data(fromlabel)
         if fromlabel == "":         # Check Subscriptions
-            qr = sqlQuery("SELECT label FROM subscriptions WHERE address=?", fromaddr)
+            qr = sqlQuery("SELECT label FROM subscriptions WHERE address=?", dbstr(fromaddr))
             if qr != []:
                 for r in qr:
                     fromlabel, = r
+                fromlabel = shared.fixPotentiallyInvalidUTF8Data(fromlabel)
         if fromlabel == "":
             fromlabel = fromaddr
-        fromlabel = shared.fixPotentiallyInvalidUTF8Data(fromlabel)
 
         # Load into array
         inbox.append([
@@ -1044,22 +1075,27 @@ def loadSent():
     ret = sqlQuery("""SELECT toaddress, fromaddress, subject, status, ackdata, lastactiontime
         FROM sent WHERE folder='sent' AND %s LIKE ?
         ORDER BY lastactiontime
-        """ % (where,), what)
+        """ % (where,), dbstr(what))
     for row in ret:
         toaddr, fromaddr, subject, status, ackdata, lastactiontime = row
+        toaddr = toaddr.decode("utf-8", "replace")
+        fromaddr = fromaddr.decode("utf-8", "replace")
         subject = ascii(shared.fixPotentiallyInvalidUTF8Data(subject))
+        status = status.decode("utf-8", "replace")
 
         # Set label for to address
         tolabel = ""
-        qr = sqlQuery("SELECT label FROM addressbook WHERE address=?", toaddr)
+        qr = sqlQuery("SELECT label FROM addressbook WHERE address=?", dbstr(toaddr))
         if qr != []:
             for r in qr:
                 tolabel, = r
+            tolabel = tolabel.decode("utf-8", "replace")
         if tolabel == "":
-            qr = sqlQuery("SELECT label FROM subscriptions WHERE address=?", toaddr)
+            qr = sqlQuery("SELECT label FROM subscriptions WHERE address=?", dbstr(toaddr))
             if qr != []:
                 for r in qr:
                     tolabel, = r
+                tolabel = tolabel.decode("utf-8", "replace")
         if tolabel == "":
             if config.has_section(toaddr):
                 tolabel = config.get(toaddr, "label")
@@ -1129,6 +1165,7 @@ def loadAddrBook():
     for row in ret:
         label, addr = row
         label = shared.fixPotentiallyInvalidUTF8Data(label)
+        addr = addr.decode("utf-8", "replace")
         addrbook.append([label, addr])
     addrbook.reverse()
 
@@ -1138,6 +1175,8 @@ def loadSubscriptions():
     ret = sqlQuery("SELECT label, address, enabled FROM subscriptions")
     for row in ret:
         label, address, enabled = row
+        label = label.decode("utf-8", "replace")
+        address = address.decode("utf-8", "replace")
         subscriptions.append([label, address, enabled])
     subscriptions.reverse()
 
@@ -1152,6 +1191,8 @@ def loadBlackWhiteList():
         ret = sqlQuery("SELECT label, address, enabled FROM whitelist")
     for row in ret:
         label, address, enabled = row
+        label = label.decode("utf-8", "replace")
+        address = address.decode("utf-8", "replace")
         blacklist.append([label, address, enabled])
     blacklist.reverse()
 

src/bitmessagekivy/baseclass/addressbook.py

@@ -29,6 +29,7 @@ from pybitmessage.bitmessagekivy.baseclass.common import (
 from pybitmessage.bitmessagekivy.baseclass.popup import SavedAddressDetailPopup
 from pybitmessage.bitmessagekivy.baseclass.addressbook_widgets import HelperAddressBook
 from pybitmessage.helper_sql import sqlExecute
+from dbcompat import dbstr
 
 logger = logging.getLogger('default')
 
@@ -59,7 +60,7 @@ class AddressBook(Screen, HelperAddressBook):
         self.ids.tag_label.text = ''
         self.queryreturn = kivy_helper_search.search_sql(
             xAddress, account, "addressbook", where, what, False)
-        self.queryreturn = [obj for obj in reversed(self.queryreturn)]
+        self.queryreturn = [[obj[0].decode("utf-8", "replace"), obj[1].decode("utf-8", "replace")] for obj in reversed(self.queryreturn)]
         if self.queryreturn:
             self.ids.tag_label.text = 'Address Book'
             self.has_refreshed = True
@@ -131,7 +132,7 @@ class AddressBook(Screen, HelperAddressBook):
         if self.ids.ml.children is not None:
             self.ids.tag_label.text = ''
         sqlExecute(
-            "DELETE FROM  addressbook WHERE address = ?", address)
+            "DELETE FROM  addressbook WHERE address = ?", dbstr(address))
         toast('Address Deleted')
 
     def close_pop(self, instance):
@@ -142,8 +143,13 @@ class AddressBook(Screen, HelperAddressBook):
     def update_addbook_label(self, instance):
         """Updating the label of address book address"""
         address_list = kivy_helper_search.search_sql(folder="addressbook")
-        stored_labels = [labels[0] for labels in address_list]
-        add_dict = dict(address_list)
+        stored_labels = [labels[0].decode("utf-8", "replace") for labels in address_list]
+        add_dict = {}
+        for row in address_list:
+            label, address = row
+            label = label.decode("utf-8", "replace")
+            address = address.decode("utf-8", "replace")
+            add_dict[label] = address
         label = str(self.addbook_popup.content_cls.ids.add_label.text)
         if label in stored_labels and self.address == add_dict[label]:
             stored_labels.remove(label)
@@ -151,7 +157,7 @@ class AddressBook(Screen, HelperAddressBook):
             sqlExecute("""
                 UPDATE addressbook
                 SET label = ?
-                WHERE address = ?""", label, self.addbook_popup.content_cls.address)
+                WHERE address = ?""", dbstr(label), dbstr(self.addbook_popup.content_cls.address))
             App.get_running_app().root.ids.id_addressbook.ids.ml.clear_widgets()
             App.get_running_app().root.ids.id_addressbook.loadAddresslist(None, 'All', '')
             self.addbook_popup.dismiss()

src/bitmessagekivy/baseclass/maildetail.py

@@ -7,6 +7,7 @@ Maildetail screen for inbox, sent, draft and trash.
 
 import os
 from datetime import datetime
+import sqlite3
 
 from kivy.core.clipboard import Clipboard
 from kivy.clock import Clock
@@ -111,7 +112,11 @@ class MailDetail(Screen):  # pylint: disable=too-many-instance-attributes
             elif self.kivy_state.detail_page_type == 'inbox':
                 data = sqlQuery(
                     "select toaddress, fromaddress, subject, message, received from inbox"
-                    " where msgid = ?", self.kivy_state.mail_id)
+                    " where msgid = ?", sqlite3.Binary(self.kivy_state.mail_id))
+                if len(data) < 1:
+                    data = sqlQuery(
+                        "select toaddress, fromaddress, subject, message, received from inbox"
+                        " where msgid = CAST(? AS TEXT)", self.kivy_state.mail_id)
                 self.assign_mail_details(data)
                 App.get_running_app().set_mail_detail_header()
         except Exception as e:  # pylint: disable=unused-variable
@@ -119,16 +124,16 @@ class MailDetail(Screen):  # pylint: disable=too-many-instance-attributes
 
     def assign_mail_details(self, data):
         """Assigning mail details"""
-        subject = data[0][2].decode() if isinstance(data[0][2], bytes) else data[0][2]
-        body = data[0][3].decode() if isinstance(data[0][2], bytes) else data[0][3]
-        self.to_addr = data[0][0] if len(data[0][0]) > 4 else ' '
-        self.from_addr = data[0][1]
+        subject = data[0][2].decode("utf-8", "replace") if isinstance(data[0][2], bytes) else data[0][2]
+        body = data[0][3].decode("utf-8", "replace") if isinstance(data[0][2], bytes) else data[0][3]
+        self.to_addr = data[0][0].decode("utf-8", "replace") if len(data[0][0]) > 4 else ' '
+        self.from_addr = data[0][1].decode("utf-8", "replace")
 
         self.subject = subject.capitalize(
         ) if subject.capitalize() else self.no_subject
         self.message = body
         if len(data[0]) == 7:
-            self.status = data[0][4]
+            self.status = data[0][4].decode("utf-8", "replace")
         self.time_tag = show_time_history(data[0][4]) if self.kivy_state.detail_page_type == 'inbox' \
             else show_time_history(data[0][6])
         self.avatarImg = os.path.join(self.kivy_state.imageDir, 'draft-icon.png') \

src/bitmessagekivy/baseclass/popup.py

@@ -59,7 +59,7 @@ class AddAddressPopup(BoxLayout):
         """Checking address is valid or not"""
         my_addresses = (
             App.get_running_app().root.ids.content_drawer.ids.identity_dropdown.values)
-        add_book = [addr[1] for addr in kivy_helper_search.search_sql(
+        add_book = [addr[1].decode("utf-8", "replace") for addr in kivy_helper_search.search_sql(
             folder="addressbook")]
         entered_text = str(instance.text).strip()
         if entered_text in add_book:
@@ -84,7 +84,7 @@ class AddAddressPopup(BoxLayout):
     def checkLabel_valid(self, instance):
         """Checking address label is unique or not"""
         entered_label = instance.text.strip()
-        addr_labels = [labels[0] for labels in kivy_helper_search.search_sql(
+        addr_labels = [labels[0].decode("utf-8", "replace") for labels in kivy_helper_search.search_sql(
             folder="addressbook")]
         if entered_label in addr_labels:
             self.ids.label.error = True
@@ -125,8 +125,13 @@ class SavedAddressDetailPopup(BoxLayout):
         """Checking address label is unique of not"""
         entered_label = str(instance.text.strip())
         address_list = kivy_helper_search.search_sql(folder="addressbook")
-        addr_labels = [labels[0] for labels in address_list]
-        add_dict = dict(address_list)
+        addr_labels = [labels[0].decode("utf-8", "replace") for labels in address_list]
+        add_dict = {}
+        for row in address_list:
+            label, address = row
+            label = label.decode("utf-8", "replace")
+            address = address.decode("utf-8", "replace")
+            add_dict[label] = address
         if self.address and entered_label in addr_labels \
                 and self.address != add_dict[entered_label]:
             self.ids.add_label.error = True

src/bitmessagekivy/identiconGeneration.py

@@ -3,7 +3,7 @@ Core classes for loading images and converting them to a Texture.
 The raw image data can be keep in memory for further access
 """
 import hashlib
-from io import BytesIO
+from six import BytesIO
 
 from PIL import Image
 from kivy.core.image import Image as CoreImage

src/bitmessagekivy/kivy_helper_search.py

@@ -2,6 +2,7 @@
 Sql queries for bitmessagekivy
 """
 from pybitmessage.helper_sql import sqlQuery
+from dbcompat import dbstr
 
 
 def search_sql(
@@ -30,21 +31,21 @@ def search_sql(
     if account is not None:
         if xAddress == 'both':
             sqlStatementParts.append("(fromaddress = ? OR toaddress = ?)")
-            sqlArguments.append(account)
-            sqlArguments.append(account)
+            sqlArguments.append(dbstr(account))
+            sqlArguments.append(dbstr(account))
         else:
             sqlStatementParts.append(xAddress + " = ? ")
-            sqlArguments.append(account)
+            sqlArguments.append(dbstr(account))
     if folder != "addressbook":
         if folder is not None:
             if folder == "new":
                 folder = "inbox"
                 unreadOnly = True
             sqlStatementParts.append("folder = ? ")
-            sqlArguments.append(folder)
+            sqlArguments.append(dbstr(folder))
         else:
             sqlStatementParts.append("folder != ?")
-            sqlArguments.append("trash")
+            sqlArguments.append(dbstr("trash"))
     if what is not None:
         for colmns in where:
             if len(where) > 1:
@@ -54,7 +55,7 @@ def search_sql(
                     filter_col += " or %s LIKE ? )" % (colmns)
             else:
                 filter_col = "%s LIKE ?" % (colmns)
-            sqlArguments.append(what)
+            sqlArguments.append(dbstr(what))
         sqlStatementParts.append(filter_col)
     if unreadOnly:
         sqlStatementParts.append("read = 0")

src/bitmessagekivy/tests/telenium_process.py

@@ -6,6 +6,7 @@ import os
 import shutil
 import tempfile
 from time import time, sleep
+from six.moves import getcwdb
 
 from requests.exceptions import ChunkedEncodingError
 
@@ -34,7 +35,7 @@ def cleanup(files=_files):
 
 class TeleniumTestProcess(TeleniumTestCase):
     """Setting Screen Functionality Testing"""
-    cmd_entrypoint = [os.path.join(os.path.abspath(os.getcwd()), 'src', 'mockbm', 'kivy_main.py')]
+    cmd_entrypoint = [os.path.join(os.path.abspath(getcwdb()), 'src', 'mockbm', 'kivy_main.py')]
 
     @classmethod
     def setUpClass(cls):

src/bitmessageqt/__init__.py

@@ -4,6 +4,7 @@ PyQt based UI for bitmessage, the main module
 
 import hashlib
 import locale
+import logging
 import os
 import random
 import string
@@ -14,46 +15,52 @@ import threading
 import time
 from datetime import datetime, timedelta
 from sqlite3 import register_adapter
+import sqlite3
+import six
+from six.moves import range as xrange
+if six.PY3:
+    from codecs import escape_decode
 
-from PyQt4 import QtCore, QtGui
-from PyQt4.QtNetwork import QLocalSocket, QLocalServer
+from unqstr import ustr, unic
+from dbcompat import dbstr
+from qtpy import QtCore, QtGui, QtWidgets, QtNetwork
 
 import shared
 import state
 from debug import logger
 from tr import _translate
-from account import (
+from .account import (
     accountClass, getSortedSubscriptions,
     BMAccount, GatewayAccount, MailchuckAccount, AccountColor)
 from addresses import decodeAddress, addBMIfNotPresent
-from bitmessageui import Ui_MainWindow
+from bitmessageqt.bitmessageui import Ui_MainWindow
 from bmconfigparser import config
 import namecoin
-from messageview import MessageView
-from migrationwizard import Ui_MigrationWizard
-from foldertree import (
+from .messageview import MessageView
+from .migrationwizard import Ui_MigrationWizard
+from .foldertree import (
     AccountMixin, Ui_FolderWidget, Ui_AddressWidget, Ui_SubscriptionWidget,
     MessageList_AddressWidget, MessageList_SubjectWidget,
     Ui_AddressBookWidgetItemLabel, Ui_AddressBookWidgetItemAddress,
     MessageList_TimeWidget)
-import settingsmixin
-import support
+from bitmessageqt import settingsmixin
+from bitmessageqt import support
 from helper_sql import sqlQuery, sqlExecute, sqlExecuteChunked, sqlStoredProcedure
 import helper_addressbook
 import helper_search
 import l10n
-from utils import str_broadcast_subscribers, avatarize
-import dialogs
+from .utils import str_broadcast_subscribers, avatarize
+from bitmessageqt import dialogs
 from network.stats import pendingDownload, pendingUpload
-from uisignaler import UISignaler
+from .uisignaler import UISignaler
 import paths
 from proofofwork import getPowType
 import queues
 import shutdown
-from statusbar import BMStatusBar
-import sound
+from .statusbar import BMStatusBar
+from bitmessageqt import sound
 # This is needed for tray icon
-import bitmessage_icons_rc  # noqa:F401 pylint: disable=unused-import
+from bitmessageqt import bitmessage_icons_rc  # noqa:F401 pylint: disable=unused-import
 import helper_sent
 
 try:
@@ -61,6 +68,7 @@ try:
 except ImportError:
     get_plugins = False
 
+logger = logging.getLogger('default')
 
 is_windows = sys.platform.startswith('win')
 
@@ -87,6 +95,13 @@ def openKeysFile():
         os.startfile(keysfile)  # pylint: disable=no-member
 
 
+def as_msgid(id_data):
+    if six.PY3:
+        return escape_decode(id_data)[0][2:-1]
+    else:  # assume six.PY2
+        return id_data
+
+
 class MyForm(settingsmixin.SMainWindow):
 
     # the maximum frequency of message sounds in seconds
@@ -102,12 +117,12 @@ class MyForm(settingsmixin.SMainWindow):
             newlocale = l10n.getTranslationLanguage()
         try:
             if not self.qmytranslator.isEmpty():
-                QtGui.QApplication.removeTranslator(self.qmytranslator)
+                QtWidgets.QApplication.removeTranslator(self.qmytranslator)
         except:
             pass
         try:
             if not self.qsystranslator.isEmpty():
-                QtGui.QApplication.removeTranslator(self.qsystranslator)
+                QtWidgets.QApplication.removeTranslator(self.qsystranslator)
         except:
             pass
 
@@ -115,7 +130,7 @@ class MyForm(settingsmixin.SMainWindow):
         translationpath = os.path.join(
             paths.codePath(), 'translations', 'bitmessage_' + newlocale)
         self.qmytranslator.load(translationpath)
-        QtGui.QApplication.installTranslator(self.qmytranslator)
+        QtWidgets.QApplication.installTranslator(self.qmytranslator)
 
         self.qsystranslator = QtCore.QTranslator()
         if paths.frozen:
@@ -123,10 +138,10 @@ class MyForm(settingsmixin.SMainWindow):
                 paths.codePath(), 'translations', 'qt_' + newlocale)
         else:
             translationpath = os.path.join(
-                str(QtCore.QLibraryInfo.location(
+                ustr(QtCore.QLibraryInfo.location(
                     QtCore.QLibraryInfo.TranslationsPath)), 'qt_' + newlocale)
         self.qsystranslator.load(translationpath)
-        QtGui.QApplication.installTranslator(self.qsystranslator)
+        QtWidgets.QApplication.installTranslator(self.qsystranslator)
 
         # TODO: move this block into l10n
         # FIXME: shouldn't newlocale be used here?
@@ -151,50 +166,35 @@ class MyForm(settingsmixin.SMainWindow):
                 logger.error("Failed to set locale to %s", lang, exc_info=True)
 
     def init_file_menu(self):
-        QtCore.QObject.connect(self.ui.actionExit, QtCore.SIGNAL(
-            "triggered()"), self.quit)
-        QtCore.QObject.connect(self.ui.actionNetworkSwitch, QtCore.SIGNAL(
-            "triggered()"), self.network_switch)
-        QtCore.QObject.connect(self.ui.actionManageKeys, QtCore.SIGNAL(
-            "triggered()"), self.click_actionManageKeys)
-        QtCore.QObject.connect(self.ui.actionDeleteAllTrashedMessages,
-                               QtCore.SIGNAL(
-                                   "triggered()"),
-                               self.click_actionDeleteAllTrashedMessages)
-        QtCore.QObject.connect(self.ui.actionRegenerateDeterministicAddresses,
-                               QtCore.SIGNAL(
-                                   "triggered()"),
-                               self.click_actionRegenerateDeterministicAddresses)
-        QtCore.QObject.connect(
-            self.ui.pushButtonAddChan,
-            QtCore.SIGNAL("clicked()"),
-            self.click_actionJoinChan) # also used for creating chans.
-        QtCore.QObject.connect(self.ui.pushButtonNewAddress, QtCore.SIGNAL(
-            "clicked()"), self.click_NewAddressDialog)
-        QtCore.QObject.connect(self.ui.pushButtonAddAddressBook, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonAddAddressBook)
-        QtCore.QObject.connect(self.ui.pushButtonAddSubscription, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonAddSubscription)
-        QtCore.QObject.connect(self.ui.pushButtonTTL, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonTTL)
-        QtCore.QObject.connect(self.ui.pushButtonClear, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonClear)
-        QtCore.QObject.connect(self.ui.pushButtonSend, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonSend)
-        QtCore.QObject.connect(self.ui.pushButtonFetchNamecoinID, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonFetchNamecoinID)
-        QtCore.QObject.connect(self.ui.actionSettings, QtCore.SIGNAL(
-            "triggered()"), self.click_actionSettings)
-        QtCore.QObject.connect(self.ui.actionAbout, QtCore.SIGNAL(
-            "triggered()"), self.click_actionAbout)
-        QtCore.QObject.connect(self.ui.actionSupport, QtCore.SIGNAL(
-            "triggered()"), self.click_actionSupport)
-        QtCore.QObject.connect(self.ui.actionHelp, QtCore.SIGNAL(
-            "triggered()"), self.click_actionHelp)
+        self.ui.actionExit.triggered.connect(self.quit)
+        self.ui.actionNetworkSwitch.triggered.connect(self.network_switch)
+        self.ui.actionManageKeys.triggered.connect(self.click_actionManageKeys)
+        self.ui.actionDeleteAllTrashedMessages.triggered.connect(
+            self.click_actionDeleteAllTrashedMessages)
+        self.ui.actionRegenerateDeterministicAddresses.triggered.connect(
+            self.click_actionRegenerateDeterministicAddresses)
+        self.ui.actionSettings.triggered.connect(self.click_actionSettings)
+        self.ui.actionAbout.triggered.connect(self.click_actionAbout)
+        self.ui.actionSupport.triggered.connect(self.click_actionSupport)
+        self.ui.actionHelp.triggered.connect(self.click_actionHelp)
+
+        # also used for creating chans.
+        self.ui.pushButtonAddChan.clicked.connect(self.click_actionJoinChan)
+        self.ui.pushButtonNewAddress.clicked.connect(
+            self.click_NewAddressDialog)
+        self.ui.pushButtonAddAddressBook.clicked.connect(
+            self.click_pushButtonAddAddressBook)
+        self.ui.pushButtonAddSubscription.clicked.connect(
+            self.click_pushButtonAddSubscription)
+        self.ui.pushButtonTTL.clicked.connect(self.click_pushButtonTTL)
+        self.ui.pushButtonClear.clicked.connect(self.click_pushButtonClear)
+        self.ui.pushButtonSend.clicked.connect(self.click_pushButtonSend)
+        self.ui.pushButtonFetchNamecoinID.clicked.connect(
+            self.click_pushButtonFetchNamecoinID)
 
     def init_inbox_popup_menu(self, connectSignal=True):
         # Popup menu for the Inbox tab
-        self.ui.inboxContextMenuToolbar = QtGui.QToolBar()
+        self.ui.inboxContextMenuToolbar = QtWidgets.QToolBar()
         # Actions
         self.actionReply = self.ui.inboxContextMenuToolbar.addAction(_translate(
             "MainWindow", "Reply to sender"), self.on_action_InboxReply)
@@ -230,25 +230,22 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.tableWidgetInbox.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.tableWidgetInbox, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.tableWidgetInbox.customContextMenuRequested.connect(
                 self.on_context_menuInbox)
         self.ui.tableWidgetInboxSubscriptions.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.tableWidgetInboxSubscriptions, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.tableWidgetInboxSubscriptions.customContextMenuRequested.connect(
                 self.on_context_menuInbox)
         self.ui.tableWidgetInboxChans.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.tableWidgetInboxChans, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.tableWidgetInboxChans.customContextMenuRequested.connect(
                 self.on_context_menuInbox)
 
     def init_identities_popup_menu(self, connectSignal=True):
         # Popup menu for the Your Identities tab
-        self.ui.addressContextMenuToolbarYourIdentities = QtGui.QToolBar()
+        self.ui.addressContextMenuToolbarYourIdentities = QtWidgets.QToolBar()
         # Actions
         self.actionNewYourIdentities = self.ui.addressContextMenuToolbarYourIdentities.addAction(_translate(
             "MainWindow", "New"), self.on_action_YourIdentitiesNew)
@@ -282,8 +279,7 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.treeWidgetYourIdentities.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.treeWidgetYourIdentities, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.treeWidgetYourIdentities.customContextMenuRequested.connect(
                 self.on_context_menuYourIdentities)
 
         # load all gui.menu plugins with prefix 'address'
@@ -332,13 +328,12 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.treeWidgetChans.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.treeWidgetChans, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.treeWidgetChans.customContextMenuRequested.connect(
                 self.on_context_menuChan)
 
     def init_addressbook_popup_menu(self, connectSignal=True):
         # Popup menu for the Address Book page
-        self.ui.addressBookContextMenuToolbar = QtGui.QToolBar()
+        self.ui.addressBookContextMenuToolbar = QtWidgets.QToolBar()
         # Actions
         self.actionAddressBookSend = self.ui.addressBookContextMenuToolbar.addAction(
             _translate(
@@ -369,8 +364,7 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.tableWidgetAddressBook.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.tableWidgetAddressBook, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.tableWidgetAddressBook.customContextMenuRequested.connect(
                 self.on_context_menuAddressBook)
 
     def init_subscriptions_popup_menu(self, connectSignal=True):
@@ -398,8 +392,7 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.treeWidgetSubscriptions.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.ui.treeWidgetSubscriptions, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
+            self.ui.treeWidgetSubscriptions.customContextMenuRequested.connect(
                 self.on_context_menuSubscriptions)
 
     def init_sent_popup_menu(self, connectSignal=True):
@@ -417,14 +410,14 @@ class MyForm(settingsmixin.SMainWindow):
         self.actionSentReply = self.ui.sentContextMenuToolbar.addAction(
             _translate("MainWindow", "Send update"),
             self.on_action_SentReply)
-        # self.popMenuSent = QtGui.QMenu( self )
+        # self.popMenuSent = QtWidgets.QMenu( self )
         # self.popMenuSent.addAction( self.actionSentClipboard )
         # self.popMenuSent.addAction( self.actionTrashSentMessage )
 
     def rerenderTabTreeSubscriptions(self):
         treeWidget = self.ui.treeWidgetSubscriptions
         folders = Ui_FolderWidget.folderWeight.keys()
-        folders.remove("new")
+        Ui_FolderWidget.folderWeight.pop("new", None)
 
         # sort ascending when creating
         if treeWidget.topLevelItemCount() == 0:
@@ -441,7 +434,6 @@ class MyForm(settingsmixin.SMainWindow):
         if treeWidget.isSortingEnabled():
             treeWidget.setSortingEnabled(False)
 
-        widgets = {}
         i = 0
         while i < treeWidget.topLevelItemCount():
             widget = treeWidget.topLevelItem(i)
@@ -459,7 +451,8 @@ class MyForm(settingsmixin.SMainWindow):
             while j < widget.childCount():
                 subwidget = widget.child(j)
                 try:
-                    subwidget.setUnreadCount(db[toAddress][subwidget.folderName]['count'])
+                    subwidget.setUnreadCount(
+                        db[toAddress][subwidget.folderName]['count'])
                     unread += db[toAddress][subwidget.folderName]['count']
                     db[toAddress].pop(subwidget.folderName, None)
                 except:
@@ -471,9 +464,10 @@ class MyForm(settingsmixin.SMainWindow):
             # add missing folders
             if len(db[toAddress]) > 0:
                 j = 0
-                for f, c in db[toAddress].iteritems():
+                for f, c in six.iteritems(db[toAddress]):
                     try:
-                        subwidget = Ui_FolderWidget(widget, j, toAddress, f, c['count'])
+                        subwidget = Ui_FolderWidget(
+                            widget, j, toAddress, f, c['count'])
                     except KeyError:
                         subwidget = Ui_FolderWidget(widget, j, toAddress, f, 0)
                     j += 1
@@ -484,20 +478,20 @@ class MyForm(settingsmixin.SMainWindow):
         i = 0
         for toAddress in db:
             widget = Ui_SubscriptionWidget(
-                treeWidget,
-                i,
-                toAddress,
-                db[toAddress]["inbox"]['count'],
+                treeWidget, i, toAddress, db[toAddress]["inbox"]['count'],
                 db[toAddress]["inbox"]['label'],
                 db[toAddress]["inbox"]['enabled'])
             j = 0
             unread = 0
             for folder in folders:
                 try:
-                    subwidget = Ui_FolderWidget(widget, j, toAddress, folder, db[toAddress][folder]['count'])
+                    subwidget = Ui_FolderWidget(
+                        widget, j, toAddress, folder,
+                        db[toAddress][folder]['count'])
                     unread += db[toAddress][folder]['count']
                 except KeyError:
-                    subwidget = Ui_FolderWidget(widget, j, toAddress, folder, 0)
+                    subwidget = Ui_FolderWidget(
+                        widget, j, toAddress, folder, 0)
                 j += 1
             widget.setUnreadCount(unread)
             i += 1
@@ -530,8 +524,8 @@ class MyForm(settingsmixin.SMainWindow):
                 toAddress, 'enabled')
             isChan = config.safeGetBoolean(
                 toAddress, 'chan')
-            isMaillinglist = config.safeGetBoolean(
-                toAddress, 'mailinglist')
+            # isMaillinglist = config.safeGetBoolean(
+            #     toAddress, 'mailinglist')
 
             if treeWidget == self.ui.treeWidgetYourIdentities:
                 if isChan:
@@ -555,6 +549,8 @@ class MyForm(settingsmixin.SMainWindow):
             "GROUP BY toaddress, folder")
         for row in queryreturn:
             toaddress, folder, cnt = row
+            toaddress = toaddress.decode("utf-8", "replace")
+            folder = folder.decode("utf-8", "replace")
             total += cnt
             if toaddress in db and folder in db[toaddress]:
                 db[toaddress][folder] = cnt
@@ -569,7 +565,6 @@ class MyForm(settingsmixin.SMainWindow):
         if treeWidget.isSortingEnabled():
             treeWidget.setSortingEnabled(False)
 
-        widgets = {}
         i = 0
         while i < treeWidget.topLevelItemCount():
             widget = treeWidget.topLevelItem(i)
@@ -601,7 +596,7 @@ class MyForm(settingsmixin.SMainWindow):
             # add missing folders
             if len(db[toAddress]) > 0:
                 j = 0
-                for f, c in db[toAddress].iteritems():
+                for f, c in six.iteritems(db[toAddress]):
                     if toAddress is not None and tab == 'messages' and folder == "new":
                         continue
                     subwidget = Ui_FolderWidget(widget, j, toAddress, f, c)
@@ -630,7 +625,7 @@ class MyForm(settingsmixin.SMainWindow):
         treeWidget.setSortingEnabled(True)
 
     def __init__(self, parent=None):
-        QtGui.QWidget.__init__(self, parent)
+        super(MyForm, self).__init__(parent)
         self.ui = Ui_MainWindow()
         self.ui.setupUi(self)
 
@@ -649,12 +644,12 @@ class MyForm(settingsmixin.SMainWindow):
             if addressVersionNumber == 1:
                 displayMsg = _translate(
                     "MainWindow",
-                    "One of your addresses, %1, is an old version 1 address. "
-                    "Version 1 addresses are no longer supported. "
-                    "May we delete it now?").arg(addressInKeysFile)
-                reply = QtGui.QMessageBox.question(
-                    self, 'Message', displayMsg, QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
-                if reply == QtGui.QMessageBox.Yes:
+                    "One of your addresses, {0}, is an old version 1"
+                    " address. Version 1 addresses are no longer supported."
+                    " May we delete it now?").format(addressInKeysFile)
+                reply = QtWidgets.QMessageBox.question(
+                    self, 'Message', displayMsg, QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No)
+                if reply == QtWidgets.QMessageBox.Yes:
                     config.remove_section(addressInKeysFile)
                     config.save()
 
@@ -698,111 +693,97 @@ class MyForm(settingsmixin.SMainWindow):
         self.rerenderSubscriptions()
 
         # Initialize the inbox search
-        QtCore.QObject.connect(self.ui.inboxSearchLineEdit, QtCore.SIGNAL(
-            "returnPressed()"), self.inboxSearchLineEditReturnPressed)
-        QtCore.QObject.connect(self.ui.inboxSearchLineEditSubscriptions, QtCore.SIGNAL(
-            "returnPressed()"), self.inboxSearchLineEditReturnPressed)
-        QtCore.QObject.connect(self.ui.inboxSearchLineEditChans, QtCore.SIGNAL(
-            "returnPressed()"), self.inboxSearchLineEditReturnPressed)
-        QtCore.QObject.connect(self.ui.inboxSearchLineEdit, QtCore.SIGNAL(
-            "textChanged(QString)"), self.inboxSearchLineEditUpdated)
-        QtCore.QObject.connect(self.ui.inboxSearchLineEditSubscriptions, QtCore.SIGNAL(
-            "textChanged(QString)"), self.inboxSearchLineEditUpdated)
-        QtCore.QObject.connect(self.ui.inboxSearchLineEditChans, QtCore.SIGNAL(
-            "textChanged(QString)"), self.inboxSearchLineEditUpdated)
+        for line_edit in (
+            self.ui.inboxSearchLineEdit,
+            self.ui.inboxSearchLineEditSubscriptions,
+            self.ui.inboxSearchLineEditChans,
+        ):
+            line_edit.returnPressed.connect(
+                self.inboxSearchLineEditReturnPressed)
+            line_edit.textChanged.connect(
+                self.inboxSearchLineEditUpdated)
 
         # Initialize addressbook
-        QtCore.QObject.connect(self.ui.tableWidgetAddressBook, QtCore.SIGNAL(
-            "itemChanged(QTableWidgetItem *)"), self.tableWidgetAddressBookItemChanged)
+        self.ui.tableWidgetAddressBook.itemChanged.connect(
+            self.tableWidgetAddressBookItemChanged)
+
         # This is necessary for the completer to work if multiple recipients
-        QtCore.QObject.connect(self.ui.lineEditTo, QtCore.SIGNAL(
-            "cursorPositionChanged(int, int)"), self.ui.lineEditTo.completer().onCursorPositionChanged)
+        self.ui.lineEditTo.cursorPositionChanged.connect(
+            self.ui.lineEditTo.completer().onCursorPositionChanged)
 
         # show messages from message list
-        QtCore.QObject.connect(self.ui.tableWidgetInbox, QtCore.SIGNAL(
-            "itemSelectionChanged ()"), self.tableWidgetInboxItemClicked)
-        QtCore.QObject.connect(self.ui.tableWidgetInboxSubscriptions, QtCore.SIGNAL(
-            "itemSelectionChanged ()"), self.tableWidgetInboxItemClicked)
-        QtCore.QObject.connect(self.ui.tableWidgetInboxChans, QtCore.SIGNAL(
-            "itemSelectionChanged ()"), self.tableWidgetInboxItemClicked)
+        for table_widget in (
+            self.ui.tableWidgetInbox,
+            self.ui.tableWidgetInboxSubscriptions,
+            self.ui.tableWidgetInboxChans
+        ):
+            table_widget.itemSelectionChanged.connect(
+                self.tableWidgetInboxItemClicked)
 
         # tree address lists
-        QtCore.QObject.connect(self.ui.treeWidgetYourIdentities, QtCore.SIGNAL(
-            "itemSelectionChanged ()"), self.treeWidgetItemClicked)
-        QtCore.QObject.connect(self.ui.treeWidgetYourIdentities, QtCore.SIGNAL(
-            "itemChanged (QTreeWidgetItem *, int)"), self.treeWidgetItemChanged)
-        QtCore.QObject.connect(self.ui.treeWidgetSubscriptions, QtCore.SIGNAL(
-            "itemSelectionChanged ()"), self.treeWidgetItemClicked)
-        QtCore.QObject.connect(self.ui.treeWidgetSubscriptions, QtCore.SIGNAL(
-            "itemChanged (QTreeWidgetItem *, int)"), self.treeWidgetItemChanged)
-        QtCore.QObject.connect(self.ui.treeWidgetChans, QtCore.SIGNAL(
-            "itemSelectionChanged ()"), self.treeWidgetItemClicked)
-        QtCore.QObject.connect(self.ui.treeWidgetChans, QtCore.SIGNAL(
-            "itemChanged (QTreeWidgetItem *, int)"), self.treeWidgetItemChanged)
-        QtCore.QObject.connect(
-            self.ui.tabWidget, QtCore.SIGNAL("currentChanged(int)"),
-            self.tabWidgetCurrentChanged
-        )
+        for tree_widget in (
+            self.ui.treeWidgetYourIdentities,
+            self.ui.treeWidgetSubscriptions,
+            self.ui.treeWidgetChans
+        ):
+            tree_widget.itemSelectionChanged.connect(
+                self.treeWidgetItemClicked)
+            tree_widget.itemChanged.connect(self.treeWidgetItemChanged)
+
+        self.ui.tabWidget.currentChanged.connect(self.tabWidgetCurrentChanged)
 
         # Put the colored icon on the status bar
         # self.pushButtonStatusIcon.setIcon(QIcon(":/newPrefix/images/yellowicon.png"))
         self.setStatusBar(BMStatusBar())
         self.statusbar = self.statusBar()
 
-        self.pushButtonStatusIcon = QtGui.QPushButton(self)
+        self.pushButtonStatusIcon = QtWidgets.QPushButton(self)
         self.pushButtonStatusIcon.setText('')
         self.pushButtonStatusIcon.setIcon(
             QtGui.QIcon(':/newPrefix/images/redicon.png'))
         self.pushButtonStatusIcon.setFlat(True)
         self.statusbar.insertPermanentWidget(0, self.pushButtonStatusIcon)
-        QtCore.QObject.connect(self.pushButtonStatusIcon, QtCore.SIGNAL(
-            "clicked()"), self.click_pushButtonStatusIcon)
+        self.pushButtonStatusIcon.clicked.connect(
+            self.click_pushButtonStatusIcon)
 
         self.unreadCount = 0
 
         # Set the icon sizes for the identicons
         identicon_size = 3 * 7
-        self.ui.tableWidgetInbox.setIconSize(QtCore.QSize(identicon_size, identicon_size))
-        self.ui.treeWidgetChans.setIconSize(QtCore.QSize(identicon_size, identicon_size))
-        self.ui.treeWidgetYourIdentities.setIconSize(QtCore.QSize(identicon_size, identicon_size))
-        self.ui.treeWidgetSubscriptions.setIconSize(QtCore.QSize(identicon_size, identicon_size))
-        self.ui.tableWidgetAddressBook.setIconSize(QtCore.QSize(identicon_size, identicon_size))
+        for widget in (
+            self.ui.tableWidgetInbox, self.ui.treeWidgetChans,
+            self.ui.treeWidgetYourIdentities, self.ui.treeWidgetSubscriptions,
+            self.ui.tableWidgetAddressBook
+        ):
+            widget.setIconSize(QtCore.QSize(identicon_size, identicon_size))
 
         self.UISignalThread = UISignaler.get()
-
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "writeNewAddressToTable(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"), self.writeNewAddressToTable)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateStatusBar(PyQt_PyObject)"), self.updateStatusBar)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateSentItemStatusByToAddress(PyQt_PyObject,PyQt_PyObject)"), self.updateSentItemStatusByToAddress)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateSentItemStatusByAckdata(PyQt_PyObject,PyQt_PyObject)"), self.updateSentItemStatusByAckdata)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "displayNewInboxMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),
+        self.UISignalThread.writeNewAddressToTable.connect(
+            self.writeNewAddressToTable)
+        self.UISignalThread.updateStatusBar.connect(self.updateStatusBar)
+        self.UISignalThread.updateSentItemStatusByToAddress.connect(
+            self.updateSentItemStatusByToAddress)
+        self.UISignalThread.updateSentItemStatusByAckdata.connect(
+            self.updateSentItemStatusByAckdata)
+        self.UISignalThread.displayNewInboxMessage.connect(
             self.displayNewInboxMessage)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "displayNewSentMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,"
-            "PyQt_PyObject,PyQt_PyObject)"),
+        self.UISignalThread.displayNewSentMessage.connect(
             self.displayNewSentMessage)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "setStatusIcon(PyQt_PyObject)"), self.setStatusIcon)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "changedInboxUnread(PyQt_PyObject)"), self.changedInboxUnread)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "rerenderMessagelistFromLabels()"), self.rerenderMessagelistFromLabels)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "rerenderMessgelistToLabels()"), self.rerenderMessagelistToLabels)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "rerenderAddressBook()"), self.rerenderAddressBook)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "rerenderSubscriptions()"), self.rerenderSubscriptions)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "removeInboxRowByMsgid(PyQt_PyObject)"), self.removeInboxRowByMsgid)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "newVersionAvailable(PyQt_PyObject)"), self.newVersionAvailable)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "displayAlert(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"), self.displayAlert)
+        self.UISignalThread.setStatusIcon.connect(self.setStatusIcon)
+        self.UISignalThread.changedInboxUnread.connect(self.changedInboxUnread)
+        self.UISignalThread.rerenderMessagelistFromLabels.connect(
+            self.rerenderMessagelistFromLabels)
+        self.UISignalThread.rerenderMessagelistToLabels.connect(
+            self.rerenderMessagelistToLabels)
+        self.UISignalThread.rerenderAddressBook.connect(
+            self.rerenderAddressBook)
+        self.UISignalThread.rerenderSubscriptions.connect(
+            self.rerenderSubscriptions)
+        self.UISignalThread.removeInboxRowByMsgid.connect(
+            self.removeInboxRowByMsgid)
+        self.UISignalThread.newVersionAvailable.connect(
+            self.newVersionAvailable)
+        self.UISignalThread.displayAlert.connect(self.displayAlert)
         self.UISignalThread.start()
 
         # Key press in tree view
@@ -831,16 +812,15 @@ class MyForm(settingsmixin.SMainWindow):
 
         # Put the TTL slider in the correct spot
         TTL = config.getint('bitmessagesettings', 'ttl')
-        if TTL < 3600: # an hour
+        if TTL < 3600:  # an hour
             TTL = 3600
-        elif TTL > 28*24*60*60: # 28 days
-            TTL = 28*24*60*60
-        self.ui.horizontalSliderTTL.setSliderPosition((TTL - 3600) ** (1/3.199))
+        elif TTL > 28 * 24 * 60 * 60:  # 28 days
+            TTL = 28 * 24 * 60 * 60
+        self.ui.horizontalSliderTTL.setSliderPosition(
+            int((TTL - 3600) ** (1 / 3.199)))
         self.updateHumanFriendlyTTLDescription(TTL)
 
-        QtCore.QObject.connect(self.ui.horizontalSliderTTL, QtCore.SIGNAL(
-            "valueChanged(int)"), self.updateTTL)
-
+        self.ui.horizontalSliderTTL.valueChanged.connect(self.updateTTL)
         self.initSettings()
         self.resetNamecoinConnection()
         self.sqlInit()
@@ -895,27 +875,25 @@ class MyForm(settingsmixin.SMainWindow):
         config.save()
 
     def updateHumanFriendlyTTLDescription(self, TTL):
-        numberOfHours = int(round(TTL / (60*60)))
+        numberOfHours = int(round(TTL / (60 * 60)))
         font = QtGui.QFont()
         stylesheet = ""
 
         if numberOfHours < 48:
             self.ui.labelHumanFriendlyTTLDescription.setText(
-                _translate("MainWindow", "%n hour(s)", None, QtCore.QCoreApplication.CodecForTr, numberOfHours) +
-                ", " +
-                _translate("MainWindow", "not recommended for chans", None, QtCore.QCoreApplication.CodecForTr)
-                )
+                _translate(
+                    "MainWindow", "%n hour(s)", None, numberOfHours
+                ) + ",\n" +
+                _translate("MainWindow", "not recommended for chans")
+            )
             stylesheet = "QLabel { color : red; }"
             font.setBold(True)
         else:
-            numberOfDays = int(round(TTL / (24*60*60)))
+            numberOfDays = int(round(TTL / (24 * 60 * 60)))
             self.ui.labelHumanFriendlyTTLDescription.setText(
                 _translate(
-                    "MainWindow",
-                    "%n day(s)",
-                    None,
-                    QtCore.QCoreApplication.CodecForTr,
-                    numberOfDays))
+                    "MainWindow", "%n day(s)", None, numberOfDays)
+            )
             font.setBold(False)
         self.ui.labelHumanFriendlyTTLDescription.setStyleSheet(stylesheet)
         self.ui.labelHumanFriendlyTTLDescription.setFont(font)
@@ -1026,7 +1004,7 @@ class MyForm(settingsmixin.SMainWindow):
             # related = related.findItems(msgid, QtCore.Qt.MatchExactly),
             # returns an empty list
             for rrow in range(related.rowCount()):
-                if related.item(rrow, 3).data() == msgid:
+                if as_msgid(related.item(rrow, 3).data()) == msgid:
                     break
 
         for col in range(widget.columnCount()):
@@ -1047,6 +1025,8 @@ class MyForm(settingsmixin.SMainWindow):
         normalUnread = {}
         broadcastsUnread = {}
         for addr, fld, count in queryReturn:
+            addr = addr.decode("utf-8", "replace")
+            fld = fld.decode("utf-8", "replace")
             try:
                 normalUnread[addr][fld] = count
             except KeyError:
@@ -1066,8 +1046,10 @@ class MyForm(settingsmixin.SMainWindow):
             queryReturn = sqlQuery(
                 'SELECT fromaddress, folder, COUNT(msgid) AS cnt'
                 ' FROM inbox WHERE read = 0 AND toaddress = ?'
-                ' GROUP BY fromaddress, folder', str_broadcast_subscribers)
+                ' GROUP BY fromaddress, folder', dbstr(str_broadcast_subscribers))
             for addr, fld, count in queryReturn:
+                addr = addr.decode("utf-8", "replace")
+                fld = fld.decode("utf-8", "replace")
                 try:
                     broadcastsUnread[addr][fld] = count
                 except KeyError:
@@ -1078,15 +1060,15 @@ class MyForm(settingsmixin.SMainWindow):
             for i in range(root.childCount()):
                 addressItem = root.child(i)
                 if addressItem.type == AccountMixin.ALL:
-                    newCount = sum(totalUnread.itervalues())
+                    newCount = sum(six.itervalues(totalUnread))
                     self.drawTrayIcon(self.currentTrayIconFileName, newCount)
                 else:
                     try:
-                        newCount = sum((
+                        newCount = sum(six.itervalues((
                             broadcastsUnread
                             if addressItem.type == AccountMixin.SUBSCRIPTION
                             else normalUnread
-                        )[addressItem.address].itervalues())
+                        )[addressItem.address]))
                     except KeyError:
                         newCount = 0
                 if newCount != addressItem.unreadCount:
@@ -1143,20 +1125,19 @@ class MyForm(settingsmixin.SMainWindow):
         elif status == 'msgsent':
             statusText = _translate(
                 "MainWindow",
-                "Message sent. Waiting for acknowledgement. Sent at %1"
-            ).arg(l10n.formatTimestamp(lastactiontime))
+                "Message sent. Waiting for acknowledgement. Sent at {0}"
+            ).format(l10n.formatTimestamp(lastactiontime))
         elif status == 'msgsentnoackexpected':
             statusText = _translate(
-                "MainWindow", "Message sent. Sent at %1"
-            ).arg(l10n.formatTimestamp(lastactiontime))
+                "MainWindow", "Message sent. Sent at {0}"
+            ).format(l10n.formatTimestamp(lastactiontime))
         elif status == 'doingmsgpow':
             statusText = _translate(
                 "MainWindow", "Doing work necessary to send message.")
         elif status == 'ackreceived':
             statusText = _translate(
-                "MainWindow",
-                "Acknowledgement of the message received %1"
-            ).arg(l10n.formatTimestamp(lastactiontime))
+                "MainWindow", "Acknowledgement of the message received {0}"
+            ).format(l10n.formatTimestamp(lastactiontime))
         elif status == 'broadcastqueued':
             statusText = _translate(
                 "MainWindow", "Broadcast queued.")
@@ -1164,36 +1145,36 @@ class MyForm(settingsmixin.SMainWindow):
             statusText = _translate(
                 "MainWindow", "Doing work necessary to send broadcast.")
         elif status == 'broadcastsent':
-            statusText = _translate("MainWindow", "Broadcast on %1").arg(
+            statusText = _translate("MainWindow", "Broadcast on {0}").format(
                 l10n.formatTimestamp(lastactiontime))
         elif status == 'toodifficult':
             statusText = _translate(
                 "MainWindow",
                 "Problem: The work demanded by the recipient is more"
-                " difficult than you are willing to do. %1"
-            ).arg(l10n.formatTimestamp(lastactiontime))
+                " difficult than you are willing to do. {0}"
+            ).format(l10n.formatTimestamp(lastactiontime))
         elif status == 'badkey':
             statusText = _translate(
                 "MainWindow",
                 "Problem: The recipient\'s encryption key is no good."
-                " Could not encrypt message. %1"
-            ).arg(l10n.formatTimestamp(lastactiontime))
+                " Could not encrypt message. {0}"
+            ).format(l10n.formatTimestamp(lastactiontime))
         elif status == 'forcepow':
             statusText = _translate(
                 "MainWindow",
                 "Forced difficulty override. Send should start soon.")
         else:
             statusText = _translate(
-                "MainWindow", "Unknown status: %1 %2").arg(status).arg(
+                "MainWindow", "Unknown status: {0} {1}").format(status,
                 l10n.formatTimestamp(lastactiontime))
 
         items = [
             MessageList_AddressWidget(
-                toAddress, unicode(acct.toLabel, 'utf-8')),
+                toAddress, unic(ustr(acct.toLabel))),
             MessageList_AddressWidget(
-                fromAddress, unicode(acct.fromLabel, 'utf-8')),
+                fromAddress, unic(ustr(acct.fromLabel))),
             MessageList_SubjectWidget(
-                str(subject), unicode(acct.subject, 'utf-8', 'replace')),
+                ustr(subject), unic(ustr(acct.subject))),
             MessageList_TimeWidget(
                 statusText, False, lastactiontime, ackdata)]
         self.addMessageListItem(tableWidget, items)
@@ -1214,11 +1195,11 @@ class MyForm(settingsmixin.SMainWindow):
 
         items = [
             MessageList_AddressWidget(
-                toAddress, unicode(acct.toLabel, 'utf-8'), not read),
+                toAddress, unic(ustr(acct.toLabel)), not read),
             MessageList_AddressWidget(
-                fromAddress, unicode(acct.fromLabel, 'utf-8'), not read),
+                fromAddress, unic(ustr(acct.fromLabel)), not read),
             MessageList_SubjectWidget(
-                str(subject), unicode(acct.subject, 'utf-8', 'replace'),
+                ustr(subject), unic(ustr(acct.subject)),
                 not read),
             MessageList_TimeWidget(
                 l10n.formatTimestamp(received), not read, received, msgid)
@@ -1246,7 +1227,14 @@ class MyForm(settingsmixin.SMainWindow):
             xAddress, account, "sent", where, what, False)
 
         for row in queryreturn:
-            self.addMessageListItemSent(tableWidget, *row)
+            r = []
+            r.append(row[0].decode("utf-8", "replace"))  # toaddress
+            r.append(row[1].decode("utf-8", "replace"))  # fromaddress
+            r.append(row[2].decode("utf-8", "replace"))  # subject
+            r.append(row[3].decode("utf-8", "replace"))  # status
+            r.append(row[4])  # ackdata
+            r.append(row[5])  # lastactiontime
+            self.addMessageListItemSent(tableWidget, *r)
 
         tableWidget.horizontalHeader().setSortIndicator(
             3, QtCore.Qt.DescendingOrder)
@@ -1287,6 +1275,10 @@ class MyForm(settingsmixin.SMainWindow):
 
         for row in queryreturn:
             toAddress, fromAddress, subject, _, msgid, received, read = row
+            toAddress = toAddress.decode("utf-8", "replace")
+            fromAddress = fromAddress.decode("utf-8", "replace")
+            subject = subject.decode("utf-8", "replace")
+            received = received.decode("utf-8", "replace")
             self.addMessageListItemInbox(
                 tableWidget, toAddress, fromAddress, subject,
                 msgid, received, read)
@@ -1302,23 +1294,21 @@ class MyForm(settingsmixin.SMainWindow):
     # create application indicator
     def appIndicatorInit(self, app):
         self.initTrayIcon("can-icon-24px-red.png", app)
-        traySignal = "activated(QSystemTrayIcon::ActivationReason)"
-        QtCore.QObject.connect(self.tray, QtCore.SIGNAL(
-            traySignal), self.__icon_activated)
+        self.tray.activated.connect(self.__icon_activated)
 
-        m = QtGui.QMenu()
+        m = QtWidgets.QMenu()
 
-        self.actionStatus = QtGui.QAction(_translate(
+        self.actionStatus = QtWidgets.QAction(_translate(
             "MainWindow", "Not Connected"), m, checkable=False)
         m.addAction(self.actionStatus)
 
         # separator
-        actionSeparator = QtGui.QAction('', m, checkable=False)
+        actionSeparator = QtWidgets.QAction('', m, checkable=False)
         actionSeparator.setSeparator(True)
         m.addAction(actionSeparator)
 
         # show bitmessage
-        self.actionShow = QtGui.QAction(_translate(
+        self.actionShow = QtWidgets.QAction(_translate(
             "MainWindow", "Show Bitmessage"), m, checkable=True)
         self.actionShow.setChecked(not config.getboolean(
             'bitmessagesettings', 'startintray'))
@@ -1327,7 +1317,7 @@ class MyForm(settingsmixin.SMainWindow):
             m.addAction(self.actionShow)
 
         # quiet mode
-        self.actionQuiet = QtGui.QAction(_translate(
+        self.actionQuiet = QtWidgets.QAction(_translate(
             "MainWindow", "Quiet Mode"), m, checkable=True)
         self.actionQuiet.setChecked(not config.getboolean(
             'bitmessagesettings', 'showtraynotifications'))
@@ -1335,25 +1325,25 @@ class MyForm(settingsmixin.SMainWindow):
         m.addAction(self.actionQuiet)
 
         # Send
-        actionSend = QtGui.QAction(_translate(
+        actionSend = QtWidgets.QAction(_translate(
             "MainWindow", "Send"), m, checkable=False)
         actionSend.triggered.connect(self.appIndicatorSend)
         m.addAction(actionSend)
 
         # Subscribe
-        actionSubscribe = QtGui.QAction(_translate(
+        actionSubscribe = QtWidgets.QAction(_translate(
             "MainWindow", "Subscribe"), m, checkable=False)
         actionSubscribe.triggered.connect(self.appIndicatorSubscribe)
         m.addAction(actionSubscribe)
 
         # Channels
-        actionSubscribe = QtGui.QAction(_translate(
+        actionSubscribe = QtWidgets.QAction(_translate(
             "MainWindow", "Channel"), m, checkable=False)
         actionSubscribe.triggered.connect(self.appIndicatorChannel)
         m.addAction(actionSubscribe)
 
         # separator
-        actionSeparator = QtGui.QAction('', m, checkable=False)
+        actionSeparator = QtWidgets.QAction('', m, checkable=False)
         actionSeparator.setSeparator(True)
         m.addAction(actionSeparator)
 
@@ -1372,6 +1362,7 @@ class MyForm(settingsmixin.SMainWindow):
         SELECT msgid, toaddress, read FROM inbox where folder='inbox'
         ''')
         for msgid, toAddress, read in queryreturn:
+            toAddress = toAddress.decode("utf-8", "replace")
 
             if not read:
                 # increment the unread subscriptions if True (1)
@@ -1450,7 +1441,7 @@ class MyForm(settingsmixin.SMainWindow):
 
     # Adapters and converters for QT <-> sqlite
     def sqlInit(self):
-        register_adapter(QtCore.QByteArray, str)
+        register_adapter(QtCore.QByteArray, bytes)
 
     def indicatorInit(self):
         """
@@ -1470,11 +1461,10 @@ class MyForm(settingsmixin.SMainWindow):
     def notifierInit(self):
         def _simple_notify(
                 title, subtitle, category, label=None, icon=None):
-            self.tray.showMessage(title, subtitle, 1, 2000)
+            self.tray.showMessage(
+                title, subtitle, self.tray.NoIcon, msecs=2000)
 
         self._notifier = _simple_notify
-        # does nothing if isAvailable returns false
-        self._player = QtGui.QSound.play
 
         if not get_plugins:
             return
@@ -1487,7 +1477,10 @@ class MyForm(settingsmixin.SMainWindow):
 
         self._theme_player = get_plugin('notification.sound', 'theme')
 
-        if not QtGui.QSound.isAvailable():
+        try:
+            from qtpy import QtMultimedia
+            self._player = QtMultimedia.QSound.play
+        except ImportError:
             _plugin = get_plugin(
                 'notification.sound', 'file', fallback='file.fallback')
             if _plugin:
@@ -1499,7 +1492,7 @@ class MyForm(settingsmixin.SMainWindow):
             self, title, subtitle, category, label=None, icon=None):
         self.playSound(category, label)
         self._notifier(
-            unicode(title), unicode(subtitle), category, label, icon)
+            unic(ustr(title)), unic(ustr(subtitle)), category, label, icon)
 
     # tree
     def treeWidgetKeyPressEvent(self, event):
@@ -1511,7 +1504,7 @@ class MyForm(settingsmixin.SMainWindow):
         if event.key() == QtCore.Qt.Key_Delete:
             self.on_action_AddressBookDelete()
         else:
-            return QtGui.QTableWidget.keyPressEvent(
+            return QtWidgets.QTableWidget.keyPressEvent(
                 self.ui.tableWidgetAddressBook, event)
 
     # inbox / sent
@@ -1526,14 +1519,14 @@ class MyForm(settingsmixin.SMainWindow):
         """This method handles keypress events for all widgets on MyForm"""
         messagelist = self.getCurrentMessagelist()
         if event.key() == QtCore.Qt.Key_Delete:
-            if isinstance(focus, (MessageView, QtGui.QTableWidget)):
+            if isinstance(focus, (MessageView, QtWidgets.QTableWidget)):
                 folder = self.getCurrentFolder()
                 if folder == "sent":
                     self.on_action_SentTrash()
                 else:
                     self.on_action_InboxTrash()
             event.ignore()
-        elif QtGui.QApplication.queryKeyboardModifiers() == QtCore.Qt.NoModifier:
+        elif QtWidgets.QApplication.queryKeyboardModifiers() == QtCore.Qt.NoModifier:
             if event.key() == QtCore.Qt.Key_N:
                 currentRow = messagelist.currentRow()
                 if currentRow < messagelist.rowCount() - 1:
@@ -1572,74 +1565,77 @@ class MyForm(settingsmixin.SMainWindow):
             return
         if isinstance(focus, MessageView):
             return MessageView.keyPressEvent(focus, event)
-        if isinstance(focus, QtGui.QTableWidget):
-            return QtGui.QTableWidget.keyPressEvent(focus, event)
-        if isinstance(focus, QtGui.QTreeWidget):
-            return QtGui.QTreeWidget.keyPressEvent(focus, event)
+        elif isinstance(focus, QtWidgets.QTableWidget):
+            return QtWidgets.QTableWidget.keyPressEvent(focus, event)
+        elif isinstance(focus, QtWidgets.QTreeWidget):
+            return QtWidgets.QTreeWidget.keyPressEvent(focus, event)
 
     # menu button 'manage keys'
     def click_actionManageKeys(self):
         if 'darwin' in sys.platform or 'linux' in sys.platform:
             if state.appdata == '':
-                # reply = QtGui.QMessageBox.information(self, 'keys.dat?','You
+                # reply = QtWidgets.QMessageBox.information(self, 'keys.dat?','You
                 # may manage your keys by editing the keys.dat file stored in
                 # the same directory as this program. It is important that you
                 # back up this file.', QMessageBox.Ok)
-                reply = QtGui.QMessageBox.information(
-                    self,
-                    'keys.dat?',
-                    _translate(
+                reply = QtWidgets.QMessageBox.information(
+                    self, 'keys.dat?', _translate(
                         "MainWindow",
-                        "You may manage your keys by editing the keys.dat file stored in the same directory"
-                        "as this program. It is important that you back up this file."
-                    ),
-                    QtGui.QMessageBox.Ok)
+                        "You may manage your keys by editing the keys.dat"
+                        " file stored in the same directory as this"
+                        " program. It is important that you back up this"
+                        " file."), QtWidgets.QMessageBox.Ok)
 
             else:
-                QtGui.QMessageBox.information(
-                    self,
-                    'keys.dat?',
+                QtWidgets.QMessageBox.information(
+                    self, 'keys.dat?',
                     _translate(
                         "MainWindow",
-                        "You may manage your keys by editing the keys.dat file stored in"
-                        "\n %1 \n"
-                        "It is important that you back up this file."
-                    ).arg(state.appdata),
-                    QtGui.QMessageBox.Ok)
+                        "You may manage your keys by editing the keys.dat"
+                        " file stored in\n {0} \nIt is important that you"
+                        " back up this file."
+                    ).format(state.appdata),
+                    QtWidgets.QMessageBox.Ok
+                )
         elif sys.platform == 'win32' or sys.platform == 'win64':
             if state.appdata == '':
-                reply = QtGui.QMessageBox.question(
-                    self,
-                    _translate("MainWindow", "Open keys.dat?"),
+                reply = QtWidgets.QMessageBox.question(
+                    self, _translate("MainWindow", "Open keys.dat?"),
                     _translate(
                         "MainWindow",
-                        "You may manage your keys by editing the keys.dat file stored in the same directory as "
-                        "this program. It is important that you back up this file. "
-                        "Would you like to open the file now? "
-                        "(Be sure to close Bitmessage before making any changes.)"),
-                    QtGui.QMessageBox.Yes,
-                    QtGui.QMessageBox.No)
+                        "You may manage your keys by editing the keys.dat"
+                        " file stored in the same directory as this"
+                        " program. It is important that you back up this"
+                        " file. Would you like to open the file now?"
+                        " (Be sure to close Bitmessage before making any"
+                        " changes.)"
+                    ), QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No)
             else:
-                reply = QtGui.QMessageBox.question(
+                reply = QtWidgets.QMessageBox.question(
                     self,
                     _translate("MainWindow", "Open keys.dat?"),
                     _translate(
                         "MainWindow",
-                        "You may manage your keys by editing the keys.dat file stored in\n %1 \n"
-                        "It is important that you back up this file. Would you like to open the file now?"
-                        "(Be sure to close Bitmessage before making any changes.)").arg(state.appdata),
-                    QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
-            if reply == QtGui.QMessageBox.Yes:
+                        "You may manage your keys by editing the keys.dat"
+                        " file stored in\n {0} \nIt is important that you"
+                        " back up this file. Would you like to open the"
+                        " file now? (Be sure to close Bitmessage before"
+                        " making any changes.)"
+                    ).format(state.appdata),
+                    QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No
+                )
+            if reply == QtWidgets.QMessageBox.Yes:
                 openKeysFile()
 
     # menu button 'delete all treshed messages'
     def click_actionDeleteAllTrashedMessages(self):
-        if QtGui.QMessageBox.question(
-                self,
-                _translate("MainWindow", "Delete trash?"),
-                _translate("MainWindow", "Are you sure you want to delete all trashed messages?"),
-                QtGui.QMessageBox.Yes,
-                QtGui.QMessageBox.No) == QtGui.QMessageBox.No:
+        if QtWidgets.QMessageBox.question(
+            self, _translate("MainWindow", "Delete trash?"),
+            _translate(
+                "MainWindow",
+                "Are you sure you want to delete all trashed messages?"
+            ), QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No
+        ) == QtWidgets.QMessageBox.No:
             return
         sqlStoredProcedure('deleteandvacuume')
         self.rerenderTabTreeMessages()
@@ -1666,7 +1662,7 @@ class MyForm(settingsmixin.SMainWindow):
         dialog = dialogs.RegenerateAddressesDialog(self)
         if dialog.exec_():
             if dialog.lineEditPassphrase.text() == "":
-                QtGui.QMessageBox.about(
+                QtWidgets.QMessageBox.about(
                     self, _translate("MainWindow", "bad passphrase"),
                     _translate(
                         "MainWindow",
@@ -1679,7 +1675,7 @@ class MyForm(settingsmixin.SMainWindow):
                 addressVersionNumber = int(
                     dialog.lineEditAddressVersionNumber.text())
             except:
-                QtGui.QMessageBox.about(
+                QtWidgets.QMessageBox.about(
                     self,
                     _translate("MainWindow", "Bad address version number"),
                     _translate(
@@ -1689,7 +1685,7 @@ class MyForm(settingsmixin.SMainWindow):
                     ))
                 return
             if addressVersionNumber < 3 or addressVersionNumber > 4:
-                QtGui.QMessageBox.about(
+                QtWidgets.QMessageBox.about(
                     self,
                     _translate("MainWindow", "Bad address version number"),
                     _translate(
@@ -1702,7 +1698,7 @@ class MyForm(settingsmixin.SMainWindow):
                 addressVersionNumber, streamNumberForAddress,
                 "regenerated deterministic address",
                 dialog.spinBoxNumberOfAddressesToMake.value(),
-                dialog.lineEditPassphrase.text().toUtf8(),
+                ustr(dialog.lineEditPassphrase.text()).encode("utf-8", "replace"),
                 dialog.checkBoxEighteenByteRipe.isChecked()
             ))
             self.ui.tabWidget.setCurrentIndex(
@@ -1753,7 +1749,7 @@ class MyForm(settingsmixin.SMainWindow):
                 pass
 
     def __icon_activated(self, reason):
-        if reason == QtGui.QSystemTrayIcon.Trigger:
+        if reason == QtWidgets.QSystemTrayIcon.Trigger:
             self.actionShow.setChecked(not self.actionShow.isChecked())
             self.appIndicatorShowOrHideWindow()
 
@@ -1823,7 +1819,7 @@ class MyForm(settingsmixin.SMainWindow):
 
     def initTrayIcon(self, iconFileName, app):
         self.currentTrayIconFileName = iconFileName
-        self.tray = QtGui.QSystemTrayIcon(
+        self.tray = QtWidgets.QSystemTrayIcon(
             self.calcTrayIcon(iconFileName, self.findInboxUnreadCount()), app)
 
     def setTrayIconFile(self, iconFileName):
@@ -1855,8 +1851,8 @@ class MyForm(settingsmixin.SMainWindow):
             # draw text
             painter = QtGui.QPainter()
             painter.begin(pixmap)
-            painter.setPen(
-                QtGui.QPen(QtGui.QColor(255, 0, 0), QtCore.Qt.SolidPattern))
+            painter.setPen(QtGui.QPen(QtGui.QColor(255, 0, 0)))
+            painter.setBrush(QtCore.Qt.SolidPattern)
             painter.setFont(font)
             painter.drawText(24-rect.right()-marginX, -rect.top()+marginY, txt)
             painter.end()
@@ -1903,10 +1899,11 @@ class MyForm(settingsmixin.SMainWindow):
                 if toAddress == rowAddress:
                     sent.item(i, 3).setToolTip(textToDisplay)
                     try:
-                        newlinePosition = textToDisplay.indexOf('\n')
-                    except:
-                        # If someone misses adding a "_translate" to a string before passing it to this function,
-                        # this function won't receive a qstring which will cause an exception.
+                        newlinePosition = textToDisplay.find('\n')
+                    # If someone misses adding a "_translate" to a string
+                    # before passing it to this function
+                    # ? why textToDisplay isn't unicode
+                    except AttributeError:
                         newlinePosition = 0
                     if newlinePosition > 1:
                         sent.item(i, 3).setText(
@@ -1915,8 +1912,6 @@ class MyForm(settingsmixin.SMainWindow):
                         sent.item(i, 3).setText(textToDisplay)
 
     def updateSentItemStatusByAckdata(self, ackdata, textToDisplay):
-        if type(ackdata) is str:
-            ackdata = QtCore.QByteArray(ackdata)
         for sent in (
             self.ui.tableWidgetInbox,
             self.ui.tableWidgetInboxSubscriptions,
@@ -1926,23 +1921,23 @@ class MyForm(settingsmixin.SMainWindow):
             if self.getCurrentFolder(treeWidget) != "sent":
                 continue
             for i in range(sent.rowCount()):
-                toAddress = sent.item(i, 0).data(QtCore.Qt.UserRole)
-                tableAckdata = sent.item(i, 3).data()
-                status, addressVersionNumber, streamNumber, ripe = decodeAddress(
-                    toAddress)
+                # toAddress = sent.item(i, 0).data(QtCore.Qt.UserRole)
+                tableAckdata = as_msgid(sent.item(i, 3).data())
+                # status, addressVersionNumber, streamNumber, ripe = decodeAddress(
+                #     toAddress)
                 if ackdata == tableAckdata:
                     sent.item(i, 3).setToolTip(textToDisplay)
                     try:
-                        newlinePosition = textToDisplay.indexOf('\n')
-                    except:
-                        # If someone misses adding a "_translate" to a string before passing it to this function, 
-                        # this function won't receive a qstring which will cause an exception.
+                        newlinePosition = textToDisplay.find('\n')
+                    # If someone misses adding a "_translate" to a string
+                    # before passing it to this function
+                    # ? why textToDisplay isn't unicode
+                    except AttributeError:
                         newlinePosition = 0
                     if newlinePosition > 1:
-                        sent.item(i, 3).setText(
-                            textToDisplay[:newlinePosition])
-                    else:
-                        sent.item(i, 3).setText(textToDisplay)
+                        textToDisplay = textToDisplay[:newlinePosition]
+
+                    sent.item(i, 3).setText(textToDisplay)
 
     def removeInboxRowByMsgid(self, msgid):
         # msgid and inventoryHash are the same thing
@@ -1953,7 +1948,7 @@ class MyForm(settingsmixin.SMainWindow):
         ):
             i = None
             for i in range(inbox.rowCount()):
-                if msgid == inbox.item(i, 3).data():
+                if msgid == as_msgid(inbox.item(i, 3).data()):
                     break
             else:
                 continue
@@ -1970,14 +1965,15 @@ class MyForm(settingsmixin.SMainWindow):
         self.notifiedNewVersion = ".".join(str(n) for n in version)
         self.updateStatusBar(_translate(
             "MainWindow",
-            "New version of PyBitmessage is available: %1. Download it"
+            "New version of PyBitmessage is available: {0}. Download it"
             " from https://github.com/Bitmessage/PyBitmessage/releases/latest"
-            ).arg(self.notifiedNewVersion)
+            ).format(self.notifiedNewVersion)
         )
 
     def displayAlert(self, title, text, exitAfterUserClicksOk):
         self.updateStatusBar(text)
-        QtGui.QMessageBox.critical(self, title, text, QtGui.QMessageBox.Ok)
+        QtWidgets.QMessageBox.critical(
+            self, title, text, QtWidgets.QMessageBox.Ok)
         if exitAfterUserClicksOk:
             os._exit(0)
 
@@ -1996,11 +1992,11 @@ class MyForm(settingsmixin.SMainWindow):
                 messagelist.item(i, 0).setLabel()
 
     def rerenderAddressBook(self):
-        def addRow (address, label, type):
+        def addRow(address, label, type):
             self.ui.tableWidgetAddressBook.insertRow(0)
-            newItem = Ui_AddressBookWidgetItemLabel(address, unicode(label, 'utf-8'), type)
+            newItem = Ui_AddressBookWidgetItemLabel(address, unic(ustr(label)), type)
             self.ui.tableWidgetAddressBook.setItem(0, 0, newItem)
-            newItem = Ui_AddressBookWidgetItemAddress(address, unicode(label, 'utf-8'), type)
+            newItem = Ui_AddressBookWidgetItemAddress(address, unic(ustr(label)), type)
             self.ui.tableWidgetAddressBook.setItem(0, 1, newItem)
 
         oldRows = {}
@@ -2009,7 +2005,8 @@ class MyForm(settingsmixin.SMainWindow):
             oldRows[item.address] = [item.label, item.type, i]
 
         if self.ui.tableWidgetAddressBook.rowCount() == 0:
-            self.ui.tableWidgetAddressBook.horizontalHeader().setSortIndicator(0, QtCore.Qt.AscendingOrder)
+            self.ui.tableWidgetAddressBook.horizontalHeader(
+            ).setSortIndicator(0, QtCore.Qt.AscendingOrder)
         if self.ui.tableWidgetAddressBook.isSortingEnabled():
             self.ui.tableWidgetAddressBook.setSortingEnabled(False)
 
@@ -2018,16 +2015,23 @@ class MyForm(settingsmixin.SMainWindow):
         queryreturn = sqlQuery('SELECT label, address FROM subscriptions WHERE enabled = 1')
         for row in queryreturn:
             label, address = row
+            label = label.decode("utf-8", "replace")
+            address = address.decode("utf-8", "replace")
             newRows[address] = [label, AccountMixin.SUBSCRIPTION]
         # chans
         for address in config.addresses(True):
             account = accountClass(address)
-            if (account.type == AccountMixin.CHAN and config.safeGetBoolean(address, 'enabled')):
+            if (
+                account.type == AccountMixin.CHAN
+                and config.safeGetBoolean(address, 'enabled')
+            ):
                 newRows[address] = [account.getLabel(), AccountMixin.CHAN]
         # normal accounts
-        queryreturn = sqlQuery('SELECT * FROM addressbook')
+        queryreturn = sqlQuery('SELECT label, address FROM addressbook')
         for row in queryreturn:
             label, address = row
+            label = label.decode("utf-8", "replace")
+            address = address.decode("utf-8", "replace")
             newRows[address] = [label, AccountMixin.NORMAL]
 
         completerList = []
@@ -2041,7 +2045,7 @@ class MyForm(settingsmixin.SMainWindow):
                 self.ui.tableWidgetAddressBook.removeRow(oldRows[address][2])
         for address in newRows:
             addRow(address, newRows[address][0], newRows[address][1])
-            completerList.append(unicode(newRows[address][0], encoding="UTF-8") + " <" + address + ">")
+            completerList.append(unic(ustr(newRows[address][0]) + " <" + ustr(address) + ">"))
 
         # sort
         self.ui.tableWidgetAddressBook.sortByColumn(
@@ -2053,16 +2057,17 @@ class MyForm(settingsmixin.SMainWindow):
         self.rerenderTabTreeSubscriptions()
 
     def click_pushButtonTTL(self):
-        QtGui.QMessageBox.information(
-            self,
-            'Time To Live',
-            _translate(
-                "MainWindow", """The TTL, or Time-To-Live is the length of time that the network will hold the message.
-                 The recipient must get it during this time. If your Bitmessage client does not hear an acknowledgement
-                 ,it will resend the message automatically. The longer the Time-To-Live, the
-                 more work your computer must do to send the message.
-                 A Time-To-Live of four or five days is often appropriate."""),
-            QtGui.QMessageBox.Ok)
+        QtWidgets.QMessageBox.information(
+            self, 'Time To Live', _translate(
+                "MainWindow",
+                "The TTL, or Time-To-Live is the length of time that"
+                " the network will hold the message. The recipient must"
+                " get it during this time. If your Bitmessage client does"
+                " not hear an acknowledgement, it will resend the message"
+                " automatically. The longer the Time-To-Live, the more"
+                " work your computer must do to send the message. A"
+                " Time-To-Live of four or five days is often appropriate."
+            ), QtWidgets.QMessageBox.Ok)
 
     def click_pushButtonClear(self):
         self.ui.lineEditSubject.setText("")
@@ -2071,7 +2076,10 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.comboBoxSendFrom.setCurrentIndex(0)
 
     def click_pushButtonSend(self):
-        encoding = 3 if QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ShiftModifier else 2
+        # pylint: disable=too-many-locals
+        encoding = (
+            3 if QtWidgets.QApplication.queryKeyboardModifiers()
+            & QtCore.Qt.ShiftModifier else 2)
 
         self.statusbar.clearMessage()
 
@@ -2079,22 +2087,22 @@ class MyForm(settingsmixin.SMainWindow):
                 self.ui.tabWidgetSend.indexOf(self.ui.sendDirect):
             # message to specific people
             sendMessageToPeople = True
-            fromAddress = str(self.ui.comboBoxSendFrom.itemData(
+            fromAddress = ustr(self.ui.comboBoxSendFrom.itemData(
                 self.ui.comboBoxSendFrom.currentIndex(),
-                QtCore.Qt.UserRole).toString())
-            toAddresses = str(self.ui.lineEditTo.text().toUtf8())
-            subject = str(self.ui.lineEditSubject.text().toUtf8())
-            message = str(
-                self.ui.textEditMessage.document().toPlainText().toUtf8())
+                QtCore.Qt.UserRole))
+            toAddresses = ustr(self.ui.lineEditTo.text())
+            subject = ustr(self.ui.lineEditSubject.text())
+            message = ustr(
+                self.ui.textEditMessage.document().toPlainText())
         else:
             # broadcast message
             sendMessageToPeople = False
-            fromAddress = str(self.ui.comboBoxSendFromBroadcast.itemData(
+            fromAddress = ustr(self.ui.comboBoxSendFromBroadcast.itemData(
                 self.ui.comboBoxSendFromBroadcast.currentIndex(),
-                QtCore.Qt.UserRole).toString())
-            subject = str(self.ui.lineEditSubjectBroadcast.text().toUtf8())
-            message = str(
-                self.ui.textEditMessageBroadcast.document().toPlainText().toUtf8())
+                QtCore.Qt.UserRole))
+            subject = ustr(self.ui.lineEditSubjectBroadcast.text())
+            message = ustr(
+                self.ui.textEditMessageBroadcast.document().toPlainText())
         """
         The whole network message must fit in 2^18 bytes.
         Let's assume 500 bytes of overhead. If someone wants to get that
@@ -2103,14 +2111,14 @@ class MyForm(settingsmixin.SMainWindow):
         users can send messages of any length.
         """
         if len(message) > (2 ** 18 - 500):
-            QtGui.QMessageBox.about(
+            QtWidgets.QMessageBox.about(
                 self, _translate("MainWindow", "Message too long"),
                 _translate(
                     "MainWindow",
                     "The message that you are trying to send is too long"
-                    " by %1 bytes. (The maximum is 261644 bytes). Please"
+                    " by {0} bytes. (The maximum is 261644 bytes). Please"
                     " cut it down before sending."
-                ).arg(len(message) - (2 ** 18 - 500)))
+                ).format(len(message) - (2 ** 18 - 500)))
             return
 
         acct = accountClass(fromAddress)
@@ -2131,25 +2139,32 @@ class MyForm(settingsmixin.SMainWindow):
                     # email address
                     if toAddress.find("@") >= 0:
                         if isinstance(acct, GatewayAccount):
-                            acct.createMessage(toAddress, fromAddress, subject, message)
+                            acct.createMessage(
+                                toAddress, fromAddress, subject, message)
                             subject = acct.subject
                             toAddress = acct.toAddress
                         else:
-                            if QtGui.QMessageBox.question(
-                                    self,
-                                    "Sending an email?",
-                                    _translate(
-                                        "MainWindow",
-                                        "You are trying to send an email instead of a bitmessage. "
-                                        "This requires registering with a gateway. Attempt to register?"),
-                                    QtGui.QMessageBox.Yes|QtGui.QMessageBox.No) != QtGui.QMessageBox.Yes:
+                            if QtWidgets.QMessageBox.question(
+                                self, "Sending an email?",
+                                _translate(
+                                    "MainWindow",
+                                    "You are trying to send an email"
+                                    " instead of a bitmessage. This"
+                                    " requires registering with a"
+                                    " gateway. Attempt to register?"
+                                ), QtWidgets.QMessageBox.Yes
+                                | QtWidgets.QMessageBox.No
+                            ) != QtWidgets.QMessageBox.Yes:
                                 continue
                             email = acct.getLabel()
-                            if email[-14:] != "@mailchuck.com": # attempt register
+                            # attempt register
+                            if email[-14:] != "@mailchuck.com":
                                 # 12 character random email address
-                                email = ''.join(
-                                        random.SystemRandom().choice(string.ascii_lowercase) for _ in range(12)
-                                        ) + "@mailchuck.com"
+                                email = u''.join(
+                                    random.SystemRandom().choice(
+                                        string.ascii_lowercase
+                                    ) for _ in range(12)
+                                ) + "@mailchuck.com"
                             acct = MailchuckAccount(fromAddress)
                             acct.register(email)
                             config.set(fromAddress, 'label', email)
@@ -2159,15 +2174,15 @@ class MyForm(settingsmixin.SMainWindow):
                                 "MainWindow",
                                 "Error: Your account wasn't registered at"
                                 " an email gateway. Sending registration"
-                                " now as %1, please wait for the registration"
+                                " now as {0}, please wait for the registration"
                                 " to be processed before retrying sending."
-                                ).arg(email)
-                            )
+                            ).format(email))
                             return
-                    status, addressVersionNumber, streamNumber = decodeAddress(toAddress)[:3]
+                    status, addressVersionNumber, streamNumber = \
+                        decodeAddress(toAddress)[:3]
                     if status != 'success':
                         try:
-                            toAddress = unicode(toAddress, 'utf-8', 'ignore')
+                            toAddress = unic(ustr(toAddress))
                         except:
                             pass
                         logger.error('Error: Could not decode recipient address ' + toAddress + ':' + status)
@@ -2176,58 +2191,58 @@ class MyForm(settingsmixin.SMainWindow):
                             self.updateStatusBar(_translate(
                                 "MainWindow",
                                 "Error: Bitmessage addresses start with"
-                                " BM-   Please check the recipient address %1"
-                                ).arg(toAddress))
+                                " BM-   Please check the recipient address {0}"
+                                ).format(toAddress))
                         elif status == 'checksumfailed':
                             self.updateStatusBar(_translate(
                                 "MainWindow",
-                                "Error: The recipient address %1 is not"
+                                "Error: The recipient address {0} is not"
                                 " typed or copied correctly. Please check it."
-                                ).arg(toAddress))
+                                ).format(toAddress))
                         elif status == 'invalidcharacters':
                             self.updateStatusBar(_translate(
                                 "MainWindow",
-                                "Error: The recipient address %1 contains"
+                                "Error: The recipient address {0} contains"
                                 " invalid characters. Please check it."
-                                ).arg(toAddress))
+                                ).format(toAddress))
                         elif status == 'versiontoohigh':
                             self.updateStatusBar(_translate(
                                 "MainWindow",
                                 "Error: The version of the recipient address"
-                                " %1 is too high. Either you need to upgrade"
+                                " {0} is too high. Either you need to upgrade"
                                 " your Bitmessage software or your"
                                 " acquaintance is being clever."
-                                ).arg(toAddress))
+                                ).format(toAddress))
                         elif status == 'ripetooshort':
                             self.updateStatusBar(_translate(
                                 "MainWindow",
                                 "Error: Some data encoded in the recipient"
-                                " address %1 is too short. There might be"
+                                " address {0} is too short. There might be"
                                 " something wrong with the software of"
                                 " your acquaintance."
-                                ).arg(toAddress))
+                                ).format(toAddress))
                         elif status == 'ripetoolong':
                             self.updateStatusBar(_translate(
                                 "MainWindow",
                                 "Error: Some data encoded in the recipient"
-                                " address %1 is too long. There might be"
+                                " address {0} is too long. There might be"
                                 " something wrong with the software of"
                                 " your acquaintance."
-                                ).arg(toAddress))
+                                ).format(toAddress))
                         elif status == 'varintmalformed':
                             self.updateStatusBar(_translate(
                                 "MainWindow",
                                 "Error: Some data encoded in the recipient"
-                                " address %1 is malformed. There might be"
+                                " address {0} is malformed. There might be"
                                 " something wrong with the software of"
                                 " your acquaintance."
-                                ).arg(toAddress))
+                                ).format(toAddress))
                         else:
                             self.updateStatusBar(_translate(
                                 "MainWindow",
                                 "Error: Something is wrong with the"
-                                " recipient address %1."
-                                ).arg(toAddress))
+                                " recipient address {0}."
+                                ).format(toAddress))
                     elif fromAddress == '':
                         self.updateStatusBar(_translate(
                             "MainWindow",
@@ -2239,24 +2254,31 @@ class MyForm(settingsmixin.SMainWindow):
                         toAddress = addBMIfNotPresent(toAddress)
 
                         if addressVersionNumber > 4 or addressVersionNumber <= 1:
-                            QtGui.QMessageBox.about(
+                            QtWidgets.QMessageBox.about(
                                 self,
-                                _translate("MainWindow", "Address version number"),
+                                _translate(
+                                    "MainWindow", "Address version number"),
                                 _translate(
                                     "MainWindow",
-                                    "Concerning the address %1, Bitmessage cannot understand address version numbers"
-                                    " of %2. Perhaps upgrade Bitmessage to the latest version."
-                                ).arg(toAddress).arg(str(addressVersionNumber)))
+                                    "Concerning the address {0}, Bitmessage"
+                                    " cannot understand address version"
+                                    " numbers of {1}. Perhaps upgrade"
+                                    " Bitmessage to the latest version."
+                                ).format(toAddress, addressVersionNumber)
+                            )
                             continue
                         if streamNumber > 1 or streamNumber == 0:
-                            QtGui.QMessageBox.about(
+                            QtWidgets.QMessageBox.about(
                                 self,
                                 _translate("MainWindow", "Stream number"),
                                 _translate(
                                     "MainWindow",
-                                    "Concerning the address %1, Bitmessage cannot handle stream numbers of %2."
-                                    " Perhaps upgrade Bitmessage to the latest version."
-                                ).arg(toAddress).arg(str(streamNumber)))
+                                    "Concerning the address {0}, Bitmessage"
+                                    " cannot handle stream numbers of {1}."
+                                    " Perhaps upgrade Bitmessage to the"
+                                    " latest version."
+                                ).format(toAddress, streamNumber)
+                            )
                             continue
                         self.statusbar.clearMessage()
                         if state.statusIconColor == 'red':
@@ -2272,10 +2294,11 @@ class MyForm(settingsmixin.SMainWindow):
                             subject=subject, message=message, encoding=encoding)
                         toLabel = ''
                         queryreturn = sqlQuery('''select label from addressbook where address=?''',
-                                               toAddress)
+                                               dbstr(toAddress))
                         if queryreturn != []:
                             for row in queryreturn:
                                 toLabel, = row
+                            toLabel = toLabel.decode("utf-8", "replace")
 
                         self.displayNewSentMessage(
                             toAddress, toLabel, fromAddress, subject, message, ackdata)
@@ -2341,11 +2364,11 @@ class MyForm(settingsmixin.SMainWindow):
             ))
 
     def click_pushButtonFetchNamecoinID(self):
-        identities = str(self.ui.lineEditTo.text().toUtf8()).split(";")
+        identities = ustr(self.ui.lineEditTo.text()).split(";")
         err, addr = self.namecoin.query(identities[-1].strip())
         if err is not None:
             self.updateStatusBar(
-                _translate("MainWindow", "Error: %1").arg(err))
+                _translate("MainWindow", "Error: {0}").format(err))
         else:
             identities[-1] = addr
             self.ui.lineEditTo.setText("; ".join(identities))
@@ -2358,7 +2381,7 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.tabWidgetSend.setCurrentIndex(
             self.ui.tabWidgetSend.indexOf(
                 self.ui.sendBroadcast
-                if config.safeGetBoolean(str(address), 'mailinglist')
+                if config.safeGetBoolean(ustr(address), 'mailinglist')
                 else self.ui.sendDirect
             ))
 
@@ -2369,21 +2392,22 @@ class MyForm(settingsmixin.SMainWindow):
             # It's easier for others to read.
             isEnabled = config.getboolean(
                 addressInKeysFile, 'enabled')
-            isMaillinglist = config.safeGetBoolean(addressInKeysFile, 'mailinglist')
+            isMaillinglist = config.safeGetBoolean(
+                addressInKeysFile, 'mailinglist')
             if isEnabled and not isMaillinglist:
-                label = unicode(config.get(addressInKeysFile, 'label'), 'utf-8', 'ignore').strip()
+                label = unic(ustr(config.get(addressInKeysFile, 'label')).strip()) or addressInKeysFile
                 if label == "":
                     label = addressInKeysFile
                 self.ui.comboBoxSendFrom.addItem(avatarize(addressInKeysFile), label, addressInKeysFile)
 #        self.ui.comboBoxSendFrom.model().sort(1, Qt.AscendingOrder)
         for i in range(self.ui.comboBoxSendFrom.count()):
-            address = str(self.ui.comboBoxSendFrom.itemData(
-                i, QtCore.Qt.UserRole).toString())
+            address = ustr(self.ui.comboBoxSendFrom.itemData(
+                i, QtCore.Qt.UserRole))
             self.ui.comboBoxSendFrom.setItemData(
                 i, AccountColor(address).accountColor(),
                 QtCore.Qt.ForegroundRole)
         self.ui.comboBoxSendFrom.insertItem(0, '', '')
-        if(self.ui.comboBoxSendFrom.count() == 2):
+        if self.ui.comboBoxSendFrom.count() == 2:
             self.ui.comboBoxSendFrom.setCurrentIndex(1)
         else:
             self.ui.comboBoxSendFrom.setCurrentIndex(0)
@@ -2395,18 +2419,16 @@ class MyForm(settingsmixin.SMainWindow):
                 addressInKeysFile, 'enabled')
             isChan = config.safeGetBoolean(addressInKeysFile, 'chan')
             if isEnabled and not isChan:
-                label = unicode(config.get(addressInKeysFile, 'label'), 'utf-8', 'ignore').strip()
-                if label == "":
-                    label = addressInKeysFile
+                label = unic(ustr(config.get(addressInKeysFile, 'label')).strip()) or addressInKeysFile
                 self.ui.comboBoxSendFromBroadcast.addItem(avatarize(addressInKeysFile), label, addressInKeysFile)
         for i in range(self.ui.comboBoxSendFromBroadcast.count()):
-            address = str(self.ui.comboBoxSendFromBroadcast.itemData(
-                i, QtCore.Qt.UserRole).toString())
+            address = ustr(self.ui.comboBoxSendFromBroadcast.itemData(
+                i, QtCore.Qt.UserRole))
             self.ui.comboBoxSendFromBroadcast.setItemData(
                 i, AccountColor(address).accountColor(),
                 QtCore.Qt.ForegroundRole)
         self.ui.comboBoxSendFromBroadcast.insertItem(0, '', '')
-        if(self.ui.comboBoxSendFromBroadcast.count() == 2):
+        if self.ui.comboBoxSendFromBroadcast.count() == 2:
             self.ui.comboBoxSendFromBroadcast.setCurrentIndex(1)
         else:
             self.ui.comboBoxSendFromBroadcast.setCurrentIndex(0)
@@ -2480,6 +2502,8 @@ class MyForm(settingsmixin.SMainWindow):
             tableWidget = self.widgetConvert(treeWidget)
             current_account = self.getCurrentAccount(treeWidget)
             current_folder = self.getCurrentFolder(treeWidget)
+            # inventoryHash surprisingly is of type unicode
+            # inventoryHash = inventoryHash.encode('utf-8')
             # pylint: disable=too-many-boolean-expressions
             if ((tableWidget == inbox
                  and current_account == acct.address
@@ -2500,13 +2524,13 @@ class MyForm(settingsmixin.SMainWindow):
                 'bitmessagesettings', 'showtraynotifications'):
             self.notifierShow(
                 _translate("MainWindow", "New Message"),
-                _translate("MainWindow", "From %1").arg(
-                    unicode(acct.fromLabel, 'utf-8')),
+                _translate("MainWindow", "From {0}").format(
+                    unic(ustr(acct.fromLabel))),
                 sound.SOUND_UNKNOWN
             )
         if self.getCurrentAccount() is not None and (
-                (self.getCurrentFolder(treeWidget) != "inbox"
-                 and self.getCurrentFolder(treeWidget) is not None)
+            (self.getCurrentFolder(treeWidget) != "inbox"
+             and self.getCurrentFolder(treeWidget) is not None)
                 or self.getCurrentAccount(treeWidget) != acct.address):
             # Ubuntu should notify of new message irrespective of
             # whether it's in current message list or not
@@ -2527,7 +2551,7 @@ class MyForm(settingsmixin.SMainWindow):
         dialog.exec_()
         try:
             address, label = dialog.data
-        except AttributeError:
+        except (AttributeError, TypeError):
             return
 
         # First we must check to see if the address is already in the
@@ -2560,7 +2584,7 @@ class MyForm(settingsmixin.SMainWindow):
         # Add to database (perhaps this should be separated from the MyForm class)
         sqlExecute(
             '''INSERT INTO subscriptions VALUES (?,?,?)''',
-            label, address, True
+            dbstr(label), dbstr(address), True
         )
         self.rerenderMessagelistFromLabels()
         shared.reloadBroadcastSendersForWhichImWatching()
@@ -2572,7 +2596,7 @@ class MyForm(settingsmixin.SMainWindow):
         dialog.exec_()
         try:
             address, label = dialog.data
-        except AttributeError:
+        except (AttributeError, TypeError):
             return
 
         # We must check to see if the address is already in the
@@ -2631,15 +2655,14 @@ class MyForm(settingsmixin.SMainWindow):
         dialog = dialogs.EmailGatewayDialog(self, config=config)
         # For Modal dialogs
         dialog.exec_()
-        try:
-            acct = dialog.data
-        except AttributeError:
+        acct = dialog.data
+        if not acct:
             return
 
         # Only settings remain here
         acct.settings()
         for i in range(self.ui.comboBoxSendFrom.count()):
-            if str(self.ui.comboBoxSendFrom.itemData(i).toPyObject()) \
+            if ustr(self.ui.comboBoxSendFrom.itemData(i)) \
                     == acct.fromAddress:
                 self.ui.comboBoxSendFrom.setCurrentIndex(i)
                 break
@@ -2658,13 +2681,13 @@ class MyForm(settingsmixin.SMainWindow):
         self.ui.textEditMessage.setFocus()
 
     def on_action_MarkAllRead(self):
-        if QtGui.QMessageBox.question(
+        if QtWidgets.QMessageBox.question(
                 self, "Marking all messages as read?",
                 _translate(
                     "MainWindow",
                     "Are you sure you would like to mark all messages read?"
-                ), QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
-        ) != QtGui.QMessageBox.Yes:
+                ), QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
+        ) != QtWidgets.QMessageBox.Yes:
             return
         tableWidget = self.getCurrentMessagelist()
 
@@ -2674,14 +2697,19 @@ class MyForm(settingsmixin.SMainWindow):
 
         msgids = []
         for i in range(0, idCount):
-            msgids.append(tableWidget.item(i, 3).data())
+            msgids.append(sqlite3.Binary(as_msgid(tableWidget.item(i, 3).data())))
             for col in xrange(tableWidget.columnCount()):
                 tableWidget.item(i, col).setUnread(False)
 
         markread = sqlExecuteChunked(
             "UPDATE inbox SET read = 1 WHERE msgid IN({0}) AND read=0",
-            idCount, *msgids
+            False, idCount, *msgids
         )
+        if markread < 1:
+            markread = sqlExecuteChunked(
+                "UPDATE inbox SET read = 1 WHERE msgid IN({0}) AND read=0",
+                True, idCount, *msgids
+            )
 
         if markread > 0:
             self.propagateUnreadCount()
@@ -2692,7 +2720,7 @@ class MyForm(settingsmixin.SMainWindow):
     def network_switch(self):
         dontconnect_option = not config.safeGetBoolean(
             'bitmessagesettings', 'dontconnect')
-        reply = QtGui.QMessageBox.question(
+        reply = QtWidgets.QMessageBox.question(
             self, _translate("MainWindow", "Disconnecting")
             if dontconnect_option else _translate("MainWindow", "Connecting"),
             _translate(
@@ -2701,12 +2729,12 @@ class MyForm(settingsmixin.SMainWindow):
             ) if dontconnect_option else _translate(
                 "MainWindow",
                 "Bitmessage will now start connecting to network. Are you sure?"
-            ), QtGui.QMessageBox.Yes | QtGui.QMessageBox.Cancel,
-            QtGui.QMessageBox.Cancel)
-        if reply != QtGui.QMessageBox.Yes:
+            ), QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.Cancel,
+            QtWidgets.QMessageBox.Cancel)
+        if reply != QtWidgets.QMessageBox.Yes:
             return
         config.set(
-            'bitmessagesettings', 'dontconnect', str(dontconnect_option))
+            'bitmessagesettings', 'dontconnect', ustr(dontconnect_option))
         config.save()
         self.ui.updateNetworkSwitchMenuLabel(dontconnect_option)
 
@@ -2729,68 +2757,66 @@ class MyForm(settingsmixin.SMainWindow):
         waitForSync = False
 
         # C PoW currently doesn't support interrupting and OpenCL is untested
-        if getPowType() == "python" and (powQueueSize() > 0 or pendingUpload() > 0):
-            reply = QtGui.QMessageBox.question(
+        if getPowType() == "python" and (
+                powQueueSize() > 0 or pendingUpload() > 0):
+            reply = QtWidgets.QMessageBox.question(
                 self, _translate("MainWindow", "Proof of work pending"),
                 _translate(
                     "MainWindow",
-                    "%n object(s) pending proof of work", None,
-                    QtCore.QCoreApplication.CodecForTr, powQueueSize()
-                ) + ", " +
-                _translate(
+                    "%n object(s) pending proof of work", None, powQueueSize()
+                ) + ", "
+                + _translate(
                     "MainWindow",
-                    "%n object(s) waiting to be distributed", None,
-                    QtCore.QCoreApplication.CodecForTr, pendingUpload()
-                ) + "\n\n" +
-                _translate(
-                    "MainWindow", "Wait until these tasks finish?"),
-                QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
-                | QtGui.QMessageBox.Cancel, QtGui.QMessageBox.Cancel)
-            if reply == QtGui.QMessageBox.No:
+                    "%n object(s) waiting to be distributed",
+                    None, pendingUpload()
+                ) + "\n\n"
+                + _translate("MainWindow", "Wait until these tasks finish?"),
+                QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
+                | QtWidgets.QMessageBox.Cancel, QtWidgets.QMessageBox.Cancel
+            )
+            if reply == QtWidgets.QMessageBox.No:
                 waitForPow = False
-            elif reply == QtGui.QMessageBox.Cancel:
+            elif reply == QtWidgets.QMessageBox.Cancel:
                 return
 
         if pendingDownload() > 0:
-            reply = QtGui.QMessageBox.question(
+            reply = QtWidgets.QMessageBox.question(
                 self, _translate("MainWindow", "Synchronisation pending"),
                 _translate(
                     "MainWindow",
                     "Bitmessage hasn't synchronised with the network,"
                     " %n object(s) to be downloaded. If you quit now,"
                     " it may cause delivery delays. Wait until the"
-                    " synchronisation finishes?", None,
-                    QtCore.QCoreApplication.CodecForTr, pendingDownload()
-                ),
-                QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
-                | QtGui.QMessageBox.Cancel, QtGui.QMessageBox.Cancel)
-            if reply == QtGui.QMessageBox.Yes:
+                    " synchronisation finishes?",
+                    None, pendingDownload()
+                ), QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
+                | QtWidgets.QMessageBox.Cancel, QtWidgets.QMessageBox.Cancel)
+            if reply == QtWidgets.QMessageBox.Yes:
                 self.wait = waitForSync = True
-            elif reply == QtGui.QMessageBox.Cancel:
+            elif reply == QtWidgets.QMessageBox.Cancel:
                 return
 
         if state.statusIconColor == 'red' and not config.safeGetBoolean(
                 'bitmessagesettings', 'dontconnect'):
-            reply = QtGui.QMessageBox.question(
+            reply = QtWidgets.QMessageBox.question(
                 self, _translate("MainWindow", "Not connected"),
                 _translate(
                     "MainWindow",
-                    "Bitmessage isn't connected to the network. If you"
+                    "Bitmessage isn't connected to the network.  If you"
                     " quit now, it may cause delivery delays. Wait until"
                     " connected and the synchronisation finishes?"
-                ),
-                QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
-                | QtGui.QMessageBox.Cancel, QtGui.QMessageBox.Cancel)
-            if reply == QtGui.QMessageBox.Yes:
+                ), QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
+                | QtWidgets.QMessageBox.Cancel, QtWidgets.QMessageBox.Cancel)
+            if reply == QtWidgets.QMessageBox.Yes:
                 waitForConnection = True
                 self.wait = waitForSync = True
-            elif reply == QtGui.QMessageBox.Cancel:
+            elif reply == QtWidgets.QMessageBox.Cancel:
                 return
 
         self.quitAccepted = True
 
         self.updateStatusBar(_translate(
-            "MainWindow", "Shutting down PyBitmessage... %1%").arg(0))
+            "MainWindow", "Shutting down PyBitmessage... {0}%").format(0))
 
         if waitForConnection:
             self.updateStatusBar(_translate(
@@ -2824,8 +2850,8 @@ class MyForm(settingsmixin.SMainWindow):
                     maxWorkerQueue = curWorkerQueue
                 if curWorkerQueue > 0:
                     self.updateStatusBar(_translate(
-                        "MainWindow", "Waiting for PoW to finish... %1%"
-                    ).arg(50 * (maxWorkerQueue - curWorkerQueue) /
+                        "MainWindow", "Waiting for PoW to finish... {0}%"
+                    ).format(50 * (maxWorkerQueue - curWorkerQueue) /
                           maxWorkerQueue))
                     time.sleep(0.5)
                     QtCore.QCoreApplication.processEvents(
@@ -2833,7 +2859,7 @@ class MyForm(settingsmixin.SMainWindow):
                     )
 
             self.updateStatusBar(_translate(
-                "MainWindow", "Shutting down Pybitmessage... %1%").arg(50))
+                "MainWindow", "Shutting down Pybitmessage... {0}%").format(50))
 
             QtCore.QCoreApplication.processEvents(
                 QtCore.QEventLoop.AllEvents, 1000
@@ -2847,34 +2873,32 @@ class MyForm(settingsmixin.SMainWindow):
 
             # check if upload (of objects created locally) pending
             self.updateStatusBar(_translate(
-                "MainWindow", "Waiting for objects to be sent... %1%").arg(50))
+                "MainWindow", "Waiting for objects to be sent... {0}%"
+            ).format(50))
             maxPendingUpload = max(1, pendingUpload())
 
             while pendingUpload() > 1:
                 self.updateStatusBar(_translate(
                     "MainWindow",
-                    "Waiting for objects to be sent... %1%"
-                ).arg(int(50 + 20 * (pendingUpload() / maxPendingUpload))))
+                    "Waiting for objects to be sent... {0}%"
+                ).format(int(50 + 20 * pendingUpload() / maxPendingUpload)))
                 time.sleep(0.5)
                 QtCore.QCoreApplication.processEvents(
                     QtCore.QEventLoop.AllEvents, 1000
                 )
 
-            QtCore.QCoreApplication.processEvents(
-                QtCore.QEventLoop.AllEvents, 1000
-            )
         QtCore.QCoreApplication.processEvents(
             QtCore.QEventLoop.AllEvents, 1000
         )
 
         # save state and geometry self and all widgets
         self.updateStatusBar(_translate(
-            "MainWindow", "Saving settings... %1%").arg(70))
+            "MainWindow", "Saving settings... {0}%").format(70))
         QtCore.QCoreApplication.processEvents(
             QtCore.QEventLoop.AllEvents, 1000
         )
         self.saveSettings()
-        for attr, obj in self.ui.__dict__.iteritems():
+        for attr, obj in six.iteritems(self.ui.__dict__):
             if hasattr(obj, "__class__") \
                     and isinstance(obj, settingsmixin.SettingsMixin):
                 saveMethod = getattr(obj, "saveSettings", None)
@@ -2882,18 +2906,18 @@ class MyForm(settingsmixin.SMainWindow):
                     obj.saveSettings()
 
         self.updateStatusBar(_translate(
-            "MainWindow", "Shutting down core... %1%").arg(80))
+            "MainWindow", "Shutting down core... {0}%").format(80))
         QtCore.QCoreApplication.processEvents(
             QtCore.QEventLoop.AllEvents, 1000
         )
         shutdown.doCleanShutdown()
 
         self.updateStatusBar(_translate(
-            "MainWindow", "Stopping notifications... %1%").arg(90))
+            "MainWindow", "Stopping notifications... {0}%").format(90))
         self.tray.hide()
 
         self.updateStatusBar(_translate(
-            "MainWindow", "Shutdown imminent... %1%").arg(100))
+            "MainWindow", "Shutdown imminent... {0}%").format(100))
 
         logger.info("Shutdown complete")
         self.close()
@@ -2919,26 +2943,39 @@ class MyForm(settingsmixin.SMainWindow):
         if not msgid:
             return
         queryreturn = sqlQuery(
-            '''select message from inbox where msgid=?''', msgid)
-        if queryreturn != []:
-            for row in queryreturn:
-                messageText, = row
+            'SELECT message FROM inbox WHERE msgid=?', sqlite3.Binary(msgid))
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                'SELECT message FROM inbox WHERE msgid=CAST(? AS TEXT)', msgid)
+        try:
+            lines_raw = queryreturn[-1][0].split('\n')
+            lines = []
+            for line in lines_raw:
+                lines.append(line.decode("utf-8", "replace"))
+        except IndexError:
+            lines = ''
 
-        lines = messageText.split('\n')
         totalLines = len(lines)
         for i in xrange(totalLines):
             if 'Message ostensibly from ' in lines[i]:
-                lines[i] = '<p style="font-size: 12px; color: grey;">%s</span></p>' % (
-                    lines[i])
-            elif lines[i] == '------------------------------------------------------':
+                lines[i] = (
+                    '<p style="font-size: 12px; color: grey;">%s</span></p>' %
+                    lines[i]
+                )
+            elif (
+                lines[i]
+                == '------------------------------------------------------'
+            ):
                 lines[i] = '<hr>'
-            elif lines[i] == '' and (i+1) < totalLines and \
-                 lines[i+1] != '------------------------------------------------------':
+            elif (
+                lines[i] == '' and (i + 1) < totalLines and lines[i + 1]
+                != '------------------------------------------------------'
+            ):
                 lines[i] = '<br><br>'
-        content = ' '.join(lines) # To keep the whitespace between lines
+        content = ' '.join(lines)  # To keep the whitespace between lines
         content = shared.fixPotentiallyInvalidUTF8Data(content)
-        content = unicode(content, 'utf-8)')
-        textEdit.setHtml(QtCore.QString(content))
+        content = unic(ustr(content))
+        textEdit.setHtml(content)
 
     def on_action_InboxMarkUnread(self):
         tableWidget = self.getCurrentMessagelist()
@@ -2949,8 +2986,8 @@ class MyForm(settingsmixin.SMainWindow):
         # modified = 0
         for row in tableWidget.selectedIndexes():
             currentRow = row.row()
-            msgid = tableWidget.item(currentRow, 3).data()
-            msgids.add(msgid)
+            msgid = as_msgid(tableWidget.item(currentRow, 3).data())
+            msgids.add(sqlite3.Binary(msgid))
             # if not tableWidget.item(currentRow, 0).unread:
             #     modified += 1
             self.updateUnreadStatus(tableWidget, currentRow, msgid, False)
@@ -2958,24 +2995,25 @@ class MyForm(settingsmixin.SMainWindow):
         # for 1081
         idCount = len(msgids)
         # rowcount =
-        sqlExecuteChunked(
+        total_row_count = sqlExecuteChunked(
             '''UPDATE inbox SET read=0 WHERE msgid IN ({0}) AND read=1''',
-            idCount, *msgids
+            False, idCount, *msgids
         )
+        if total_row_count < 1:
+            sqlExecuteChunked(
+                '''UPDATE inbox SET read=0 WHERE msgid IN ({0}) AND read=1''',
+                True, idCount, *msgids
+            )
 
         self.propagateUnreadCount()
-        # tableWidget.selectRow(currentRow + 1)
-        # This doesn't de-select the last message if you try to mark it
-        # unread, but that doesn't interfere. Might not be necessary.
-        # We could also select upwards, but then our problem would be
-        # with the topmost message.
-        # tableWidget.clearSelection() manages to mark the message
-        # as read again.
 
     # Format predefined text on message reply.
     def quoted_text(self, message):
         if not config.safeGetBoolean('bitmessagesettings', 'replybelow'):
-            return '\n\n------------------------------------------------------\n' + message
+            return (
+                '\n\n------------------------------------------------------\n' +
+                message
+            )
 
         quoteWrapper = textwrap.TextWrapper(
             replace_whitespace=False, initial_indent='> ',
@@ -3005,7 +3043,7 @@ class MyForm(settingsmixin.SMainWindow):
             self.ui.comboBoxSendFrom, self.ui.comboBoxSendFromBroadcast
         ):
             for i in range(box.count()):
-                if str(box.itemData(i).toPyObject()) == address:
+                if ustr(box.itemData(i)) == ustr(address):
                     box.setCurrentIndex(i)
                     break
             else:
@@ -3039,17 +3077,23 @@ class MyForm(settingsmixin.SMainWindow):
         acct = accountClass(toAddressAtCurrentInboxRow)
         fromAddressAtCurrentInboxRow = tableWidget.item(
             currentInboxRow, column_from).address
-        msgid = tableWidget.item(currentInboxRow, 3).data()
+        msgid = as_msgid(tableWidget.item(currentInboxRow, 3).data())
         queryreturn = sqlQuery(
-            "SELECT message FROM inbox WHERE msgid=?", msgid
-        ) or sqlQuery("SELECT message FROM sent WHERE ackdata=?", msgid)
+            "SELECT message FROM inbox WHERE msgid=?", sqlite3.Binary(msgid)
+        ) or sqlQuery("SELECT message FROM sent WHERE ackdata=?", sqlite3.Binary(msgid))
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                "SELECT message FROM inbox WHERE msgid=CAST(? AS TEXT)", msgid
+            ) or sqlQuery("SELECT message FROM sent WHERE ackdata=CAST(? AS TEXT)", msgid)
         if queryreturn != []:
             for row in queryreturn:
                 messageAtCurrentInboxRow, = row
+            messageAtCurrentInboxRow = messageAtCurrentInboxRow.decode("utf-8", "replace")
         acct.parseMessage(
             toAddressAtCurrentInboxRow, fromAddressAtCurrentInboxRow,
             tableWidget.item(currentInboxRow, 2).subject,
-            messageAtCurrentInboxRow)
+            messageAtCurrentInboxRow
+        )
         widget = {
             'subject': self.ui.lineEditSubject,
             'from': self.ui.comboBoxSendFrom,
@@ -3062,23 +3106,26 @@ class MyForm(settingsmixin.SMainWindow):
             )
 #            toAddressAtCurrentInboxRow = fromAddressAtCurrentInboxRow
         elif not config.has_section(toAddressAtCurrentInboxRow):
-            QtGui.QMessageBox.information(
-                self, _translate("MainWindow", "Address is gone"),
+            QtWidgets.QMessageBox.information(
+                self,
+                _translate("MainWindow", "Address is gone"),
                 _translate(
                     "MainWindow",
-                    "Bitmessage cannot find your address %1. Perhaps you"
+                    "Bitmessage cannot find your address {0}. Perhaps you"
                     " removed it?"
-                ).arg(toAddressAtCurrentInboxRow), QtGui.QMessageBox.Ok)
+                ).format(toAddressAtCurrentInboxRow),
+                QtWidgets.QMessageBox.Ok)
         elif not config.getboolean(
                 toAddressAtCurrentInboxRow, 'enabled'):
-            QtGui.QMessageBox.information(
-                self, _translate("MainWindow", "Address disabled"),
+            QtWidgets.QMessageBox.information(
+                self,
+                _translate("MainWindow", "Address disabled"),
                 _translate(
                     "MainWindow",
                     "Error: The address from which you are trying to send"
-                    " is disabled. You\'ll have to enable it on the"
-                    " \'Your Identities\' tab before using it."
-                ), QtGui.QMessageBox.Ok)
+                    " is disabled. You\'ll have to enable it on the \'Your"
+                    " Identities\' tab before using it."
+                ), QtWidgets.QMessageBox.Ok)
         else:
             self.setBroadcastEnablementDependingOnWhetherThisIsAMailingListAddress(toAddressAtCurrentInboxRow)
             broadcast_tab_index = self.ui.tabWidgetSend.indexOf(
@@ -3096,7 +3143,7 @@ class MyForm(settingsmixin.SMainWindow):
             tableWidget.item(currentInboxRow, column_from).label or (
                 isinstance(acct, GatewayAccount) and
                 fromAddressAtCurrentInboxRow == acct.relayAddress):
-            self.ui.lineEditTo.setText(str(acct.fromAddress))
+            self.ui.lineEditTo.setText(ustr(acct.fromAddress))
         else:
             self.ui.lineEditTo.setText(
                 tableWidget.item(currentInboxRow, column_from).accountString()
@@ -3111,7 +3158,7 @@ class MyForm(settingsmixin.SMainWindow):
                 ' reply to the chan address.')
             if toAddressAtCurrentInboxRow == \
                     tableWidget.item(currentInboxRow, column_to).label:
-                self.ui.lineEditTo.setText(str(toAddressAtCurrentInboxRow))
+                self.ui.lineEditTo.setText(ustr(toAddressAtCurrentInboxRow))
             else:
                 self.ui.lineEditTo.setText(
                     tableWidget.item(currentInboxRow, column_to).accountString()
@@ -3120,7 +3167,7 @@ class MyForm(settingsmixin.SMainWindow):
         self.setSendFromComboBox(toAddressAtCurrentInboxRow)
 
         quotedText = self.quoted_text(
-            unicode(messageAtCurrentInboxRow, 'utf-8', 'replace'))
+            unic(ustr(messageAtCurrentInboxRow)))
         widget['message'].setPlainText(quotedText)
         if acct.subject[0:3] in ('Re:', 'RE:'):
             widget['subject'].setText(
@@ -3156,14 +3203,15 @@ class MyForm(settingsmixin.SMainWindow):
         recipientAddress = tableWidget.item(
             currentInboxRow, 0).data(QtCore.Qt.UserRole)
         # Let's make sure that it isn't already in the address book
-        queryreturn = sqlQuery('''select * from blacklist where address=?''',
-                               addressAtCurrentInboxRow)
+        queryreturn = sqlQuery(
+            'SELECT * FROM blacklist WHERE address=?',
+            dbstr(addressAtCurrentInboxRow))
         if queryreturn == []:
             label = "\"" + tableWidget.item(currentInboxRow, 2).subject + "\" in " + config.get(
                 recipientAddress, "label")
             sqlExecute('''INSERT INTO blacklist VALUES (?,?, ?)''',
-                       label,
-                       addressAtCurrentInboxRow, True)
+                       dbstr(label),
+                       dbstr(addressAtCurrentInboxRow), True)
             self.ui.blackwhitelist.rerenderBlackWhiteList()
             self.updateStatusBar(_translate(
                 "MainWindow",
@@ -3188,15 +3236,15 @@ class MyForm(settingsmixin.SMainWindow):
             messageLists = (messageLists,)
         for messageList in messageLists:
             if row is not None:
-                inventoryHash = messageList.item(row, 3).data()
+                inventoryHash = as_msgid(messageList.item(row, 3).data())
                 messageList.removeRow(row)
             elif inventoryHash is not None:
                 for i in range(messageList.rowCount() - 1, -1, -1):
-                    if messageList.item(i, 3).data() == inventoryHash:
+                    if as_msgid(messageList.item(i, 3).data()) == inventoryHash:
                         messageList.removeRow(i)
             elif ackData is not None:
                 for i in range(messageList.rowCount() - 1, -1, -1):
-                    if messageList.item(i, 3).data() == ackData:
+                    if as_msgid(messageList.item(i, 3).data()) == ackData:
                         messageList.removeRow(i)
 
     # Send item on the Inbox tab to trash
@@ -3206,8 +3254,8 @@ class MyForm(settingsmixin.SMainWindow):
             return
         currentRow = 0
         folder = self.getCurrentFolder()
-        shifted = QtGui.QApplication.queryKeyboardModifiers() \
-            & QtCore.Qt.ShiftModifier
+        shifted = (QtWidgets.QApplication.queryKeyboardModifiers() &
+                   QtCore.Qt.ShiftModifier)
         tableWidget.setUpdatesEnabled(False)
         inventoryHashesToTrash = set()
         # ranges in reversed order
@@ -3216,16 +3264,21 @@ class MyForm(settingsmixin.SMainWindow):
         )[::-1]:
             for i in range(r.bottomRow() - r.topRow() + 1):
                 inventoryHashesToTrash.add(
-                    tableWidget.item(r.topRow() + i, 3).data())
+                    sqlite3.Binary(as_msgid(tableWidget.item(r.topRow() + i, 3).data())))
             currentRow = r.topRow()
             self.getCurrentMessageTextedit().setText("")
             tableWidget.model().removeRows(
                 r.topRow(), r.bottomRow() - r.topRow() + 1)
         idCount = len(inventoryHashesToTrash)
-        sqlExecuteChunked(
+        total_row_count = sqlExecuteChunked(
             ("DELETE FROM inbox" if folder == "trash" or shifted else
              "UPDATE inbox SET folder='trash', read=1") +
-            " WHERE msgid IN ({0})", idCount, *inventoryHashesToTrash)
+            " WHERE msgid IN ({0})", False, idCount, *inventoryHashesToTrash)
+        if total_row_count < 1:
+            sqlExecuteChunked(
+                ("DELETE FROM inbox" if folder == "trash" or shifted else
+                 "UPDATE inbox SET folder='trash', read=1") +
+                " WHERE msgid IN ({0})", True, idCount, *inventoryHashesToTrash)
         tableWidget.selectRow(0 if currentRow == 0 else currentRow - 1)
         tableWidget.setUpdatesEnabled(True)
         self.propagateUnreadCount(folder)
@@ -3244,16 +3297,20 @@ class MyForm(settingsmixin.SMainWindow):
         )[::-1]:
             for i in range(r.bottomRow() - r.topRow() + 1):
                 inventoryHashesToTrash.add(
-                    tableWidget.item(r.topRow() + i, 3).data())
+                    sqlite3.Binary(as_msgid(tableWidget.item(r.topRow() + i, 3).data())))
             currentRow = r.topRow()
             self.getCurrentMessageTextedit().setText("")
             tableWidget.model().removeRows(
                 r.topRow(), r.bottomRow() - r.topRow() + 1)
         tableWidget.selectRow(0 if currentRow == 0 else currentRow - 1)
         idCount = len(inventoryHashesToTrash)
-        sqlExecuteChunked(
+        total_row_count = sqlExecuteChunked(
             "UPDATE inbox SET folder='inbox' WHERE msgid IN({0})",
-            idCount, *inventoryHashesToTrash)
+            False, idCount, *inventoryHashesToTrash)
+        if total_row_count < 1:
+            sqlExecuteChunked(
+                "UPDATE inbox SET folder='inbox' WHERE msgid IN({0})",
+                True, idCount, *inventoryHashesToTrash)
         tableWidget.selectRow(0 if currentRow == 0 else currentRow - 1)
         tableWidget.setUpdatesEnabled(True)
         self.propagateUnreadCount()
@@ -3265,30 +3322,33 @@ class MyForm(settingsmixin.SMainWindow):
             return
         currentInboxRow = tableWidget.currentRow()
         try:
-            subjectAtCurrentInboxRow = str(tableWidget.item(
+            subjectAtCurrentInboxRow = ustr(tableWidget.item(
                 currentInboxRow, 2).data(QtCore.Qt.UserRole))
         except:
             subjectAtCurrentInboxRow = ''
 
         # Retrieve the message data out of the SQL database
-        msgid = tableWidget.item(currentInboxRow, 3).data()
+        msgid = as_msgid(tableWidget.item(currentInboxRow, 3).data())
         queryreturn = sqlQuery(
-            '''select message from inbox where msgid=?''', msgid)
+            'SELECT message FROM inbox WHERE msgid=?', sqlite3.Binary(msgid))
+        if len(queryreturn) < 1:
+            queryreturn = sqlQuery(
+                'SELECT message FROM inbox WHERE msgid=CAST(? AS TEXT)', msgid)
         if queryreturn != []:
             for row in queryreturn:
                 message, = row
+            message = message.decode("utf-8", "replace")
 
-        defaultFilename = "".join(x for x in subjectAtCurrentInboxRow if x.isalnum()) + '.txt'
-        filename = QtGui.QFileDialog.getSaveFileName(
-            self,
-            _translate("MainWindow","Save As..."),
-            defaultFilename,
-            "Text files (*.txt);;All files (*.*)")
-        if filename == '':
+        defaultFilename = "".join(
+            x for x in subjectAtCurrentInboxRow if x.isalnum()) + '.txt'
+        filename = QtWidgets.QFileDialog.getSaveFileName(
+            self, _translate("MainWindow", "Save As..."), defaultFilename,
+            "Text files (*.txt);;All files (*.*)")[0]
+        if not filename:
             return
         try:
             f = open(filename, 'w')
-            f.write(message)
+            f.write(message.encode("utf-8", "replace"))
             f.close()
         except Exception:
             logger.exception('Message not saved', exc_info=True)
@@ -3296,19 +3356,27 @@ class MyForm(settingsmixin.SMainWindow):
 
     # Send item on the Sent tab to trash
     def on_action_SentTrash(self):
+        currentRow = 0
         tableWidget = self.getCurrentMessagelist()
         if not tableWidget:
             return
         folder = self.getCurrentFolder()
-        shifted = QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ShiftModifier
+        shifted = (QtWidgets.QApplication.queryKeyboardModifiers() &
+                   QtCore.Qt.ShiftModifier)
         while tableWidget.selectedIndexes() != []:
             currentRow = tableWidget.selectedIndexes()[0].row()
-            ackdataToTrash = tableWidget.item(currentRow, 3).data()
-            sqlExecute(
+            ackdataToTrash = as_msgid(tableWidget.item(currentRow, 3).data())
+            rowcount = sqlExecute(
                 "DELETE FROM sent" if folder == "trash" or shifted else
                 "UPDATE sent SET folder='trash'"
-                " WHERE ackdata = ?", ackdataToTrash
+                " WHERE ackdata = ?", sqlite3.Binary(ackdataToTrash)
             )
+            if rowcount < 1:
+                sqlExecute(
+                    "DELETE FROM sent" if folder == "trash" or shifted else
+                    "UPDATE sent SET folder='trash'"
+                    " WHERE ackdata = CAST(? AS TEXT)", ackdataToTrash
+                )
             self.getCurrentMessageTextedit().setPlainText("")
             tableWidget.removeRow(currentRow)
             self.updateStatusBar(_translate(
@@ -3322,22 +3390,29 @@ class MyForm(settingsmixin.SMainWindow):
         addressAtCurrentRow = self.ui.tableWidgetInbox.item(
             currentRow, 0).data(QtCore.Qt.UserRole)
         toRipe = decodeAddress(addressAtCurrentRow)[3]
-        sqlExecute(
+        rowcount = sqlExecute(
             '''UPDATE sent SET status='forcepow' WHERE toripe=? AND status='toodifficult' and folder='sent' ''',
-            toRipe)
+            sqlite3.Binary(toRipe))
+        if rowcount < 1:
+            sqlExecute(
+                '''UPDATE sent SET status='forcepow' WHERE toripe=CAST(? AS TEXT) AND status='toodifficult' and folder='sent' ''',
+                toRipe)
         queryreturn = sqlQuery('''select ackdata FROM sent WHERE status='forcepow' ''')
         for row in queryreturn:
             ackdata, = row
-            queues.UISignalQueue.put(('updateSentItemStatusByAckdata', (
-                ackdata, 'Overriding maximum-difficulty setting. Work queued.')))
+            queues.UISignalQueue.put((
+                'updateSentItemStatusByAckdata',
+                (ackdata, 'Overriding maximum-difficulty setting.'
+                 ' Work queued.')
+            ))
         queues.workerQueue.put(('sendmessage', ''))
 
     def on_action_SentClipboard(self):
         currentRow = self.ui.tableWidgetInbox.currentRow()
         addressAtCurrentRow = self.ui.tableWidgetInbox.item(
             currentRow, 0).data(QtCore.Qt.UserRole)
-        clipboard = QtGui.QApplication.clipboard()
-        clipboard.setText(str(addressAtCurrentRow))
+        clipboard = QtWidgets.QApplication.clipboard()
+        clipboard.setText(ustr(addressAtCurrentRow))
 
     # Group of functions for the Address Book dialog box
     def on_action_AddressBookNew(self):
@@ -3349,7 +3424,7 @@ class MyForm(settingsmixin.SMainWindow):
                 0].row()
             item = self.ui.tableWidgetAddressBook.item(currentRow, 0)
             sqlExecute(
-                'DELETE FROM addressbook WHERE address=?', item.address)
+                'DELETE FROM addressbook WHERE address=?', dbstr(item.address))
             self.ui.tableWidgetAddressBook.removeRow(currentRow)
         self.rerenderMessagelistFromLabels()
         self.rerenderMessagelistToLabels()
@@ -3361,7 +3436,7 @@ class MyForm(settingsmixin.SMainWindow):
                 addresses_string = item.address
             else:
                 addresses_string += ', ' + item.address
-        clipboard = QtGui.QApplication.clipboard()
+        clipboard = QtWidgets.QApplication.clipboard()
         clipboard.setText(addresses_string)
 
     def on_action_AddressBookSend(self):
@@ -3371,8 +3446,7 @@ class MyForm(settingsmixin.SMainWindow):
             return self.updateStatusBar(_translate(
                 "MainWindow", "No addresses selected."))
 
-        addresses_string = unicode(
-            self.ui.lineEditTo.text().toUtf8(), 'utf-8')
+        addresses_string = unic(ustr(self.ui.lineEditTo.text()))
         for item in selected_items:
             address_string = item.accountString()
             if not addresses_string:
@@ -3403,7 +3477,7 @@ class MyForm(settingsmixin.SMainWindow):
             )
 
     def on_context_menuAddressBook(self, point):
-        self.popMenuAddressBook = QtGui.QMenu(self)
+        self.popMenuAddressBook = QtWidgets.QMenu(self)
         self.popMenuAddressBook.addAction(self.actionAddressBookSend)
         self.popMenuAddressBook.addAction(self.actionAddressBookClipboard)
         self.popMenuAddressBook.addAction(self.actionAddressBookSubscribe)
@@ -3433,7 +3507,7 @@ class MyForm(settingsmixin.SMainWindow):
         self.click_pushButtonAddSubscription()
 
     def on_action_SubscriptionsDelete(self):
-        if QtGui.QMessageBox.question(
+        if QtWidgets.QMessageBox.question(
                 self, "Delete subscription?",
                 _translate(
                     "MainWindow",
@@ -3444,12 +3518,12 @@ class MyForm(settingsmixin.SMainWindow):
                     " messages, but you can still view messages you"
                     " already received.\n\nAre you sure you want to"
                     " delete the subscription?"
-                ), QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
-        ) != QtGui.QMessageBox.Yes:
+                ), QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
+        ) != QtWidgets.QMessageBox.Yes:
             return
         address = self.getCurrentAccount()
         sqlExecute('''DELETE FROM subscriptions WHERE address=?''',
-                   address)
+                   dbstr(address))
         self.rerenderTabTreeSubscriptions()
         self.rerenderMessagelistFromLabels()
         self.rerenderAddressBook()
@@ -3457,14 +3531,14 @@ class MyForm(settingsmixin.SMainWindow):
 
     def on_action_SubscriptionsClipboard(self):
         address = self.getCurrentAccount()
-        clipboard = QtGui.QApplication.clipboard()
-        clipboard.setText(str(address))
+        clipboard = QtWidgets.QApplication.clipboard()
+        clipboard.setText(ustr(address))
 
     def on_action_SubscriptionsEnable(self):
         address = self.getCurrentAccount()
         sqlExecute(
             '''update subscriptions set enabled=1 WHERE address=?''',
-            address)
+            dbstr(address))
         account = self.getCurrentItem()
         account.setEnabled(True)
         self.rerenderAddressBook()
@@ -3474,7 +3548,7 @@ class MyForm(settingsmixin.SMainWindow):
         address = self.getCurrentAccount()
         sqlExecute(
             '''update subscriptions set enabled=0 WHERE address=?''',
-            address)
+            dbstr(address))
         account = self.getCurrentItem()
         account.setEnabled(False)
         self.rerenderAddressBook()
@@ -3482,7 +3556,7 @@ class MyForm(settingsmixin.SMainWindow):
 
     def on_context_menuSubscriptions(self, point):
         currentItem = self.getCurrentItem()
-        self.popMenuSubscriptions = QtGui.QMenu(self)
+        self.popMenuSubscriptions = QtWidgets.QMenu(self)
         if isinstance(currentItem, Ui_AddressWidget):
             self.popMenuSubscriptions.addAction(self.actionsubscriptionsNew)
             self.popMenuSubscriptions.addAction(self.actionsubscriptionsDelete)
@@ -3522,8 +3596,6 @@ class MyForm(settingsmixin.SMainWindow):
             return self.ui.tableWidgetInboxSubscriptions
         elif widget == self.ui.treeWidgetChans:
             return self.ui.tableWidgetInboxChans
-        else:
-            return None
 
     def getCurrentTreeWidget(self):
         currentIndex = self.ui.tabWidget.currentIndex()
@@ -3576,7 +3648,7 @@ class MyForm(settingsmixin.SMainWindow):
         if messagelist:
             currentRow = messagelist.currentRow()
             if currentRow >= 0:
-                return messagelist.item(currentRow, 3).data()
+                return as_msgid(messagelist.item(currentRow, 3).data())
 
     def getCurrentMessageTextedit(self):
         currentIndex = self.ui.tabWidget.currentIndex()
@@ -3610,9 +3682,9 @@ class MyForm(settingsmixin.SMainWindow):
             self.ui.inboxSearchLineEditChans,
         )
         if currentIndex >= 0 and currentIndex < len(messagelistList):
-            return (
+            return ustr(
                 messagelistList[currentIndex] if retObj
-                else messagelistList[currentIndex].text().toUtf8().data())
+                else ustr(messagelistList[currentIndex].text()))
 
     def getCurrentSearchOption(self, currentIndex=None):
         if currentIndex is None:
@@ -3668,7 +3740,7 @@ class MyForm(settingsmixin.SMainWindow):
         if account.type == AccountMixin.NORMAL:
             return  # maybe in the future
         elif account.type == AccountMixin.CHAN:
-            if QtGui.QMessageBox.question(
+            if QtWidgets.QMessageBox.question(
                     self, "Delete channel?",
                     _translate(
                         "MainWindow",
@@ -3679,9 +3751,9 @@ class MyForm(settingsmixin.SMainWindow):
                         " messages, but you can still view messages you"
                         " already received.\n\nAre you sure you want to"
                         " delete the channel?"
-                    ), QtGui.QMessageBox.Yes | QtGui.QMessageBox.No
-            ) == QtGui.QMessageBox.Yes:
-                config.remove_section(str(account.address))
+                    ), QtWidgets.QMessageBox.Yes | QtWidgets.QMessageBox.No
+            ) == QtWidgets.QMessageBox.Yes:
+                config.remove_section(ustr(account.address))
             else:
                 return
         else:
@@ -3714,15 +3786,15 @@ class MyForm(settingsmixin.SMainWindow):
         account.setEnabled(False)
 
     def disableIdentity(self, address):
-        config.set(str(address), 'enabled', 'false')
+        config.set(ustr(address), 'enabled', 'false')
         config.save()
         shared.reloadMyAddressHashes()
         self.rerenderAddressBook()
 
     def on_action_Clipboard(self):
         address = self.getCurrentAccount()
-        clipboard = QtGui.QApplication.clipboard()
-        clipboard.setText(str(address))
+        clipboard = QtWidgets.QApplication.clipboard()
+        clipboard.setText(ustr(address))
 
     def on_action_ClipboardMessagelist(self):
         tableWidget = self.getCurrentMessagelist()
@@ -3739,14 +3811,14 @@ class MyForm(settingsmixin.SMainWindow):
             myAddress = tableWidget.item(currentRow, 0).data(QtCore.Qt.UserRole)
             otherAddress = tableWidget.item(currentRow, 1).data(QtCore.Qt.UserRole)
         account = accountClass(myAddress)
-        if isinstance(account, GatewayAccount) and otherAddress == account.relayAddress and (
-                (currentColumn in [0, 2] and self.getCurrentFolder() == "sent") or
-                (currentColumn in [1, 2] and self.getCurrentFolder() != "sent")):
-            text = str(tableWidget.item(currentRow, currentColumn).label)
+        if isinstance(account, GatewayAccount) \
+            and otherAddress == account.relayAddress and (
+                (currentColumn in (0, 2) and currentFolder == "sent") or
+                (currentColumn in (1, 2) and currentFolder != "sent")):
+            text = ustr(tableWidget.item(currentRow, currentColumn).label)
         else:
-            text = tableWidget.item(currentRow, currentColumn).data(QtCore.Qt.UserRole)
-
-        clipboard = QtGui.QApplication.clipboard()
+            text = ustr(tableWidget.item(currentRow, currentColumn).data(QtCore.Qt.UserRole))
+        clipboard = QtWidgets.QApplication.clipboard()
         clipboard.setText(text)
 
     # set avatar functions
@@ -3759,8 +3831,8 @@ class MyForm(settingsmixin.SMainWindow):
 
     def on_action_SetAvatar(self, thisTableWidget):
         currentRow = thisTableWidget.currentRow()
-        addressAtCurrentRow = thisTableWidget.item(
-            currentRow, 1).text()
+        addressAtCurrentRow = ustr(thisTableWidget.item(
+            currentRow, 1).text())
         setToIdenticon = not self.setAvatar(addressAtCurrentRow)
         if setToIdenticon:
             thisTableWidget.item(
@@ -3770,11 +3842,8 @@ class MyForm(settingsmixin.SMainWindow):
     def setAvatar(self, addressAtCurrentRow):
         if not os.path.exists(state.appdata + 'avatars/'):
             os.makedirs(state.appdata + 'avatars/')
-        hash = hashlib.md5(addBMIfNotPresent(addressAtCurrentRow)).hexdigest()
-        extensions = [
-            'PNG', 'GIF', 'JPG', 'JPEG', 'SVG', 'BMP', 'MNG', 'PBM',
-            'PGM', 'PPM', 'TIFF', 'XBM', 'XPM', 'TGA']
-
+        hash = hashlib.md5(addBMIfNotPresent(addressAtCurrentRow).encode("utf-8", "replace")).hexdigest()
+        # http://pyqt.sourceforge.net/Docs/PyQt4/qimagereader.html#supportedImageFormats
         names = {
             'BMP': 'Windows Bitmap',
             'GIF': 'Graphic Interchange Format',
@@ -3789,11 +3858,12 @@ class MyForm(settingsmixin.SMainWindow):
             'XBM': 'X11 Bitmap',
             'XPM': 'X11 Pixmap',
             'SVG': 'Scalable Vector Graphics',
-            'TGA': 'Targa Image Format'}
+            'TGA': 'Targa Image Format'
+        }
         filters = []
         all_images_filter = []
         current_files = []
-        for ext in extensions:
+        for ext in names:
             filters += [names[ext] + ' (*.' + ext.lower() + ')']
             all_images_filter += ['*.' + ext.lower()]
             upper = state.appdata + 'avatars/' + hash + '.' + ext.upper()
@@ -3804,10 +3874,9 @@ class MyForm(settingsmixin.SMainWindow):
                 current_files += [upper]
         filters[0:0] = ['Image files (' + ' '.join(all_images_filter) + ')']
         filters[1:1] = ['All files (*.*)']
-        sourcefile = QtGui.QFileDialog.getOpenFileName(
+        sourcefile = QtWidgets.QFileDialog.getOpenFileName(
             self, _translate("MainWindow", "Set avatar..."),
-            filter=';;'.join(filters)
-        )
+            filter=';;'.join(filters))[0]
         # determine the correct filename (note that avatars don't use the suffix)
         destination = state.appdata + 'avatars/' + hash + '.' + sourcefile.split('.')[-1]
         exists = QtCore.QFile.exists(destination)
@@ -3816,11 +3885,11 @@ class MyForm(settingsmixin.SMainWindow):
             if exists | (len(current_files) > 0):
                 displayMsg = _translate(
                     "MainWindow", "Do you really want to remove this avatar?")
-                overwrite = QtGui.QMessageBox.question(
+                overwrite = QtWidgets.QMessageBox.question(
                     self, 'Message', displayMsg,
-                    QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
+                    QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No)
             else:
-                overwrite = QtGui.QMessageBox.No
+                overwrite = QtWidgets.QMessageBox.No
         else:
             # ask whether to overwrite old avatar
             if exists | (len(current_files) > 0):
@@ -3828,15 +3897,15 @@ class MyForm(settingsmixin.SMainWindow):
                     "MainWindow",
                     "You have already set an avatar for this address."
                     " Do you really want to overwrite it?")
-                overwrite = QtGui.QMessageBox.question(
+                overwrite = QtWidgets.QMessageBox.question(
                     self, 'Message', displayMsg,
-                    QtGui.QMessageBox.Yes, QtGui.QMessageBox.No)
+                    QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No)
             else:
-                overwrite = QtGui.QMessageBox.No
+                overwrite = QtWidgets.QMessageBox.No
 
         # copy the image file to the appdata folder
-        if (not exists) | (overwrite == QtGui.QMessageBox.Yes):
-            if overwrite == QtGui.QMessageBox.Yes:
+        if (not exists) | (overwrite == QtWidgets.QMessageBox.Yes):
+            if overwrite == QtWidgets.QMessageBox.Yes:
                 for file in current_files:
                     QtCore.QFile.remove(file)
                 QtCore.QFile.remove(destination)
@@ -3861,23 +3930,23 @@ class MyForm(settingsmixin.SMainWindow):
 
     def on_action_AddressBookSetSound(self):
         widget = self.ui.tableWidgetAddressBook
-        self.setAddressSound(widget.item(widget.currentRow(), 0).text())
+        self.setAddressSound(ustr(widget.item(widget.currentRow(), 0).text()))
 
     def setAddressSound(self, addr):
-        filters = [unicode(_translate(
+        filters = [unic(_translate(
             "MainWindow", "Sound files (%s)" %
             ' '.join(['*%s%s' % (os.extsep, ext) for ext in sound.extensions])
         ))]
-        sourcefile = unicode(QtGui.QFileDialog.getOpenFileName(
+        sourcefile = unic(ustr(QtWidgets.QFileDialog.getOpenFileName(
             self, _translate("MainWindow", "Set notification sound..."),
             filter=';;'.join(filters)
-        ))
+        )))[0]
 
         if not sourcefile:
             return
 
         destdir = os.path.join(state.appdata, 'sounds')
-        destfile = unicode(addr) + os.path.splitext(sourcefile)[-1]
+        destfile = unic(ustr(addr) + os.path.splitext(sourcefile)[-1])
         destination = os.path.join(destdir, destfile)
 
         if sourcefile == destination:
@@ -3886,15 +3955,15 @@ class MyForm(settingsmixin.SMainWindow):
         pattern = destfile.lower()
         for item in os.listdir(destdir):
             if item.lower() == pattern:
-                overwrite = QtGui.QMessageBox.question(
+                overwrite = QtWidgets.QMessageBox.question(
                     self, _translate("MainWindow", "Message"),
                     _translate(
                         "MainWindow",
                         "You have already set a notification sound"
                         " for this address book entry."
                         " Do you really want to overwrite it?"),
-                    QtGui.QMessageBox.Yes, QtGui.QMessageBox.No
-                ) == QtGui.QMessageBox.Yes
+                    QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No
+                ) == QtWidgets.QMessageBox.Yes
                 if overwrite:
                     QtCore.QFile.remove(os.path.join(destdir, item))
                 break
@@ -3905,18 +3974,23 @@ class MyForm(settingsmixin.SMainWindow):
 
     def on_context_menuYourIdentities(self, point):
         currentItem = self.getCurrentItem()
-        self.popMenuYourIdentities = QtGui.QMenu(self)
+        self.popMenuYourIdentities = QtWidgets.QMenu(self)
         if isinstance(currentItem, Ui_AddressWidget):
             self.popMenuYourIdentities.addAction(self.actionNewYourIdentities)
             self.popMenuYourIdentities.addSeparator()
-            self.popMenuYourIdentities.addAction(self.actionClipboardYourIdentities)
+            self.popMenuYourIdentities.addAction(
+                self.actionClipboardYourIdentities)
             self.popMenuYourIdentities.addSeparator()
             if currentItem.isEnabled:
-                self.popMenuYourIdentities.addAction(self.actionDisableYourIdentities)
+                self.popMenuYourIdentities.addAction(
+                    self.actionDisableYourIdentities)
             else:
-                self.popMenuYourIdentities.addAction(self.actionEnableYourIdentities)
-            self.popMenuYourIdentities.addAction(self.actionSetAvatarYourIdentities)
-            self.popMenuYourIdentities.addAction(self.actionSpecialAddressBehaviorYourIdentities)
+                self.popMenuYourIdentities.addAction(
+                    self.actionEnableYourIdentities)
+            self.popMenuYourIdentities.addAction(
+                self.actionSetAvatarYourIdentities)
+            self.popMenuYourIdentities.addAction(
+                self.actionSpecialAddressBehaviorYourIdentities)
             self.popMenuYourIdentities.addAction(self.actionEmailGateway)
             self.popMenuYourIdentities.addSeparator()
             if currentItem.type != AccountMixin.ALL:
@@ -3935,7 +4009,7 @@ class MyForm(settingsmixin.SMainWindow):
     # TODO make one popMenu
     def on_context_menuChan(self, point):
         currentItem = self.getCurrentItem()
-        self.popMenu = QtGui.QMenu(self)
+        self.popMenu = QtWidgets.QMenu(self)
         if isinstance(currentItem, Ui_AddressWidget):
             self.popMenu.addAction(self.actionNew)
             self.popMenu.addAction(self.actionDelete)
@@ -3971,7 +4045,7 @@ class MyForm(settingsmixin.SMainWindow):
             self.on_context_menuSent(point)
             return
 
-        self.popMenuInbox = QtGui.QMenu(self)
+        self.popMenuInbox = QtWidgets.QMenu(self)
         self.popMenuInbox.addAction(self.actionForceHtml)
         self.popMenuInbox.addAction(self.actionMarkUnread)
         self.popMenuInbox.addSeparator()
@@ -4006,7 +4080,7 @@ class MyForm(settingsmixin.SMainWindow):
 
     def on_context_menuSent(self, point):
         currentRow = self.ui.tableWidgetInbox.currentRow()
-        self.popMenuSent = QtGui.QMenu(self)
+        self.popMenuSent = QtWidgets.QMenu(self)
         self.popMenuSent.addAction(self.actionSentClipboard)
         self._contact_selected = self.ui.tableWidgetInbox.item(currentRow, 0)
         # preloaded gui.menu plugins with prefix 'address'
@@ -4019,10 +4093,13 @@ class MyForm(settingsmixin.SMainWindow):
         # Check to see if this item is toodifficult and display an additional
         # menu option (Force Send) if it is.
         if currentRow >= 0:
-            ackData = self.ui.tableWidgetInbox.item(currentRow, 3).data()
-            queryreturn = sqlQuery('''SELECT status FROM sent where ackdata=?''', ackData)
+            ackData = as_msgid(self.ui.tableWidgetInbox.item(currentRow, 3).data())
+            queryreturn = sqlQuery('''SELECT status FROM sent where ackdata=?''', sqlite3.Binary(ackData))
+            if len(queryreturn) < 1:
+                queryreturn = sqlQuery('''SELECT status FROM sent where ackdata=CAST(? AS TEXT)''', ackData)
             for row in queryreturn:
                 status, = row
+            status = status.decode("utf-8", "replace")
             if status == 'toodifficult':
                 self.popMenuSent.addAction(self.actionForceSend)
 
@@ -4030,7 +4107,7 @@ class MyForm(settingsmixin.SMainWindow):
 
     def inboxSearchLineEditUpdated(self, text):
         # dynamic search for too short text is slow
-        text = text.toUtf8()
+        text = ustr(text)
         if 0 < len(text) < 3:
             return
         messagelist = self.getCurrentMessagelist()
@@ -4043,9 +4120,9 @@ class MyForm(settingsmixin.SMainWindow):
 
     def inboxSearchLineEditReturnPressed(self):
         logger.debug("Search return pressed")
-        searchLine = self.getCurrentSearchLine()
+        searchLine = self.getCurrentSearchLine().encode('utf-8')
         messagelist = self.getCurrentMessagelist()
-        if messagelist and len(str(searchLine)) < 3:
+        if messagelist and len(ustr(searchLine)) < 3:
             searchOption = self.getCurrentSearchOption()
             account = self.getCurrentAccount()
             folder = self.getCurrentFolder()
@@ -4087,7 +4164,7 @@ class MyForm(settingsmixin.SMainWindow):
         if item.type == AccountMixin.ALL:
             return
 
-        newLabel = unicode(item.text(0), 'utf-8', 'ignore')
+        newLabel = unic(ustr(item.text(0)))
         oldLabel = item.defaultLabel()
 
         # unchanged, do not do anything either
@@ -4106,7 +4183,9 @@ class MyForm(settingsmixin.SMainWindow):
         self.rerenderMessagelistFromLabels()
         if item.type != AccountMixin.SUBSCRIPTION:
             self.rerenderMessagelistToLabels()
-        if item.type in (AccountMixin.NORMAL, AccountMixin.CHAN, AccountMixin.SUBSCRIPTION):
+        if item.type in (
+            AccountMixin.NORMAL, AccountMixin.CHAN, AccountMixin.SUBSCRIPTION
+        ):
             self.rerenderAddressBook()
         self.recurDepth -= 1
 
@@ -4119,17 +4198,26 @@ class MyForm(settingsmixin.SMainWindow):
         folder = self.getCurrentFolder()
         if msgid:
             queryreturn = sqlQuery(
-                '''SELECT message FROM %s WHERE %s=?''' % (
+                'SELECT message FROM %s WHERE %s=?' % (
                     ('sent', 'ackdata') if folder == 'sent'
                     else ('inbox', 'msgid')
-                ), msgid
+                ), sqlite3.Binary(msgid)
             )
+            if len(queryreturn) < 1:
+                queryreturn = sqlQuery(
+                    'SELECT message FROM %s WHERE %s=CAST(? AS TEXT)' % (
+                        ('sent', 'ackdata') if folder == 'sent'
+                        else ('inbox', 'msgid')
+                    ), msgid
+                )
 
         try:
-            message = queryreturn[-1][0]
+            message = queryreturn[-1][0].decode("utf-8", "replace")
         except NameError:
-            message = ""
+            message = u''
         except IndexError:
+            # _translate() often returns unicode, no redefinition here!
+            # pylint: disable=redefined-variable-type
             message = _translate(
                 "MainWindow",
                 "Error occurred: could not load message from disk."
@@ -4141,10 +4229,16 @@ class MyForm(settingsmixin.SMainWindow):
             if tableWidget.item(currentRow, 0).unread is True:
                 self.updateUnreadStatus(tableWidget, currentRow, msgid)
             # propagate
-            if folder != 'sent' and sqlExecute(
-                '''UPDATE inbox SET read=1 WHERE msgid=? AND read=0''',
-                msgid
-            ) > 0:
+            rowcount = sqlExecute(
+                'UPDATE inbox SET read=1 WHERE msgid=? AND read=0',
+                sqlite3.Binary(msgid)
+            )
+            if rowcount < 1:
+                rowcount = sqlExecute(
+                    'UPDATE inbox SET read=1 WHERE msgid=CAST(? AS TEXT) AND read=0',
+                    msgid
+                )
+            if folder != 'sent' and rowcount > 0:
                 self.propagateUnreadCount()
 
         messageTextedit.setCurrentFont(QtGui.QFont())
@@ -4158,8 +4252,9 @@ class MyForm(settingsmixin.SMainWindow):
         self.rerenderMessagelistToLabels()
         completerList = self.ui.lineEditTo.completer().model().stringList()
         for i in range(len(completerList)):
-            if unicode(completerList[i]).endswith(" <" + item.address + ">"):
-                completerList[i] = item.label + " <" + item.address + ">"
+            address_block = " <" + ustr(item.address) + ">"
+            if unic(ustr(completerList[i])).endswith(unic(address_block)):
+                completerList[i] = ustr(item.label) + address_block
         self.ui.lineEditTo.completer().model().setStringList(completerList)
 
     def tabWidgetCurrentChanged(self, n):
@@ -4212,7 +4307,7 @@ class MyForm(settingsmixin.SMainWindow):
 
     def initSettings(self):
         self.loadSettings()
-        for attr, obj in self.ui.__dict__.iteritems():
+        for attr, obj in six.iteritems(self.ui.__dict__):
             if hasattr(obj, "__class__") and \
                     isinstance(obj, settingsmixin.SettingsMixin):
                 loadMethod = getattr(obj, "loadSettings", None)
@@ -4224,7 +4319,7 @@ app = None
 myapp = None
 
 
-class BitmessageQtApplication(QtGui.QApplication):
+class BitmessageQtApplication(QtWidgets.QApplication):
     """
     Listener to allow our Qt form to get focus when another instance of the
     application is open.
@@ -4263,15 +4358,15 @@ class BitmessageQtApplication(QtGui.QApplication):
         self.server = None
         self.is_running = False
 
-        socket = QLocalSocket()
+        socket = QtNetwork.QLocalSocket()
         socket.connectToServer(id)
         self.is_running = socket.waitForConnected()
 
         # Cleanup past crashed servers
         if not self.is_running:
-            if socket.error() == QLocalSocket.ConnectionRefusedError:
+            if socket.error() == QtNetwork.QLocalSocket.ConnectionRefusedError:
                 socket.disconnectFromServer()
-                QLocalServer.removeServer(id)
+                QtNetwork.QLocalServer.removeServer(id)
 
         socket.abort()
 
@@ -4282,16 +4377,12 @@ class BitmessageQtApplication(QtGui.QApplication):
         else:
             # Nope, create a local server with this id and assign on_new_connection
             # for whenever a second instance tries to run focus the application.
-            self.server = QLocalServer()
+            self.server = QtNetwork.QLocalServer()
             self.server.listen(id)
             self.server.newConnection.connect(self.on_new_connection)
 
         self.setStyleSheet("QStatusBar::item { border: 0px solid black }")
 
-    def __del__(self):
-        if self.server:
-            self.server.close()
-
     def on_new_connection(self):
         if myapp:
             myapp.appIndicatorShow()

src/bitmessageqt/account.py

@@ -1,20 +1,16 @@
-# pylint: disable=too-many-instance-attributes,attribute-defined-outside-init
 """
-account.py
-==========
-
 Account related functions.
 
 """
 
-from __future__ import absolute_import
-
 import inspect
 import re
 import sys
 import time
+import sqlite3
 
-from PyQt4 import QtGui
+from unqstr import ustr, unic
+from dbcompat import dbstr
 
 import queues
 from addresses import decodeAddress
@@ -23,6 +19,7 @@ from helper_ackPayload import genAckPayload
 from helper_sql import sqlQuery, sqlExecute
 from .foldertree import AccountMixin
 from .utils import str_broadcast_subscribers
+from tr import _translate
 
 
 def getSortedSubscriptions(count=False):
@@ -34,22 +31,25 @@ def getSortedSubscriptions(count=False):
     :retuns: dict keys are addresses, values are dicts containing settings
     :rtype: dict, default {}
     """
-    queryreturn = sqlQuery('SELECT label, address, enabled FROM subscriptions ORDER BY label COLLATE NOCASE ASC')
+    queryreturn = sqlQuery(
+        'SELECT label, address, enabled FROM subscriptions'
+        ' ORDER BY label COLLATE NOCASE ASC')
     ret = {}
-    for row in queryreturn:
-        label, address, enabled = row
-        ret[address] = {}
-        ret[address]["inbox"] = {}
-        ret[address]["inbox"]['label'] = label
-        ret[address]["inbox"]['enabled'] = enabled
-        ret[address]["inbox"]['count'] = 0
+    for label, address, enabled in queryreturn:
+        label = label.decode("utf-8", "replace")
+        address = address.decode("utf-8", "replace")
+        ret[address] = {'inbox': {}}
+        ret[address]['inbox'].update(label=label, enabled=enabled, count=0)
     if count:
-        queryreturn = sqlQuery('''SELECT fromaddress, folder, count(msgid) as cnt
-            FROM inbox, subscriptions ON subscriptions.address = inbox.fromaddress
-            WHERE read = 0 AND toaddress = ?
-            GROUP BY inbox.fromaddress, folder''', str_broadcast_subscribers)
-        for row in queryreturn:
-            address, folder, cnt = row
+        queryreturn = sqlQuery(
+            'SELECT fromaddress, folder, count(msgid) AS cnt'
+            ' FROM inbox, subscriptions'
+            ' ON subscriptions.address = inbox.fromaddress WHERE read = 0'
+            ' AND toaddress = ? GROUP BY inbox.fromaddress, folder',
+            dbstr(str_broadcast_subscribers))
+        for address, folder, cnt in queryreturn:
+            address = address.decode("utf-8", "replace")
+            folder = folder.decode("utf-8", "replace")
             if folder not in ret[address]:
                 ret[address][folder] = {
                     'label': ret[address]['inbox']['label'],
@@ -75,7 +75,8 @@ def accountClass(address):
         return subscription
     try:
         gateway = config.get(address, "gateway")
-        for _, cls in inspect.getmembers(sys.modules[__name__], inspect.isclass):
+        for _, cls in inspect.getmembers(
+                sys.modules[__name__], inspect.isclass):
             if issubclass(cls, GatewayAccount) and cls.gatewayName == gateway:
                 return cls(address)
         # general gateway
@@ -86,7 +87,7 @@ def accountClass(address):
     return BMAccount(address)
 
 
-class AccountColor(AccountMixin):  # pylint: disable=too-few-public-methods
+class AccountColor(AccountMixin):
     """Set the type of account"""
 
     def __init__(self, address, address_type=None):
@@ -100,7 +101,9 @@ class AccountColor(AccountMixin):  # pylint: disable=too-few-public-methods
             elif config.safeGetBoolean(self.address, 'chan'):
                 self.type = AccountMixin.CHAN
             elif sqlQuery(
-                    '''select label from subscriptions where address=?''', self.address):
+                'SELECT label FROM subscriptions WHERE address=?',
+                dbstr(self.address)
+            ):
                 self.type = AccountMixin.SUBSCRIPTION
             else:
                 self.type = AccountMixin.NORMAL
@@ -108,12 +111,35 @@ class AccountColor(AccountMixin):  # pylint: disable=too-few-public-methods
             self.type = address_type
 
 
-class BMAccount(object):
-    """Encapsulate a Bitmessage account"""
-
+class NoAccount(object):
+    """Minimal account like object (All accounts)"""
+    # pylint: disable=too-many-instance-attributes
     def __init__(self, address=None):
         self.address = address
         self.type = AccountMixin.NORMAL
+        self.toAddress = self.fromAddress = ''
+        self.subject = self.message = ''
+        self.fromLabel = self.toLabel = ''
+
+    def getLabel(self, address=None):
+        """Get a label for this bitmessage account"""
+        return address or self.address
+
+    def parseMessage(self, toAddress, fromAddress, subject, message):
+        """Set metadata and address labels on self"""
+        self.toAddress = ustr(toAddress)
+        self.fromAddress = ustr(fromAddress)
+        self.subject = ustr(subject)
+        self.message = ustr(message)
+        self.fromLabel = ustr(self.getLabel(fromAddress))
+        self.toLabel = ustr(self.getLabel(toAddress))
+
+
+class BMAccount(NoAccount):
+    """Encapsulate a Bitmessage account"""
+
+    def __init__(self, address=None):
+        super(BMAccount, self).__init__(address)
         if config.has_section(address):
             if config.safeGetBoolean(self.address, 'chan'):
                 self.type = AccountMixin.CHAN
@@ -121,55 +147,25 @@ class BMAccount(object):
                 self.type = AccountMixin.MAILINGLIST
         elif self.address == str_broadcast_subscribers:
             self.type = AccountMixin.BROADCAST
-        else:
-            queryreturn = sqlQuery(
-                '''select label from subscriptions where address=?''', self.address)
-            if queryreturn:
-                self.type = AccountMixin.SUBSCRIPTION
+        elif sqlQuery(
+            'SELECT label FROM subscriptions WHERE address=?', dbstr(self.address)
+        ):
+            self.type = AccountMixin.SUBSCRIPTION
 
     def getLabel(self, address=None):
         """Get a label for this bitmessage account"""
-        if address is None:
-            address = self.address
+        address = super(BMAccount, self).getLabel(address)
         label = config.safeGet(address, 'label', address)
         queryreturn = sqlQuery(
-            '''select label from addressbook where address=?''', address)
-        if queryreturn != []:
-            for row in queryreturn:
-                label, = row
+            'SELECT label FROM addressbook WHERE address=?', dbstr(address))
+        if queryreturn:
+            label = queryreturn[-1][0]
         else:
             queryreturn = sqlQuery(
-                '''select label from subscriptions where address=?''', address)
-            if queryreturn != []:
-                for row in queryreturn:
-                    label, = row
-        return label
-
-    def parseMessage(self, toAddress, fromAddress, subject, message):
-        """Set metadata and address labels on self"""
-
-        self.toAddress = toAddress
-        self.fromAddress = fromAddress
-        if isinstance(subject, unicode):
-            self.subject = str(subject)
-        else:
-            self.subject = subject
-        self.message = message
-        self.fromLabel = self.getLabel(fromAddress)
-        self.toLabel = self.getLabel(toAddress)
-
-
-class NoAccount(BMAccount):
-    """Override the __init__ method on a BMAccount"""
-
-    def __init__(self, address=None):  # pylint: disable=super-init-not-called
-        self.address = address
-        self.type = AccountMixin.NORMAL
-
-    def getLabel(self, address=None):
-        if address is None:
-            address = self.address
-        return address
+                'SELECT label FROM subscriptions WHERE address=?', dbstr(address))
+            if queryreturn:
+                label = queryreturn[-1][0]
+        return unic(ustr(label))
 
 
 class SubscriptionAccount(BMAccount):
@@ -189,31 +185,27 @@ class GatewayAccount(BMAccount):
     ALL_OK = 0
     REGISTRATION_DENIED = 1
 
-    def __init__(self, address):
-        super(GatewayAccount, self).__init__(address)
-
     def send(self):
-        """Override the send method for gateway accounts"""
-
-        # pylint: disable=unused-variable
-        status, addressVersionNumber, streamNumber, ripe = decodeAddress(self.toAddress)
-        stealthLevel = config.safeGetInt('bitmessagesettings', 'ackstealthlevel')
+        """The send method for gateway accounts"""
+        streamNumber, ripe = decodeAddress(self.toAddress)[2:]
+        stealthLevel = config.safeGetInt(
+            'bitmessagesettings', 'ackstealthlevel')
         ackdata = genAckPayload(streamNumber, stealthLevel)
         sqlExecute(
             '''INSERT INTO sent VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)''',
-            '',
-            self.toAddress,
-            ripe,
-            self.fromAddress,
-            self.subject,
-            self.message,
-            ackdata,
+            sqlite3.Binary(b''),
+            dbstr(self.toAddress),
+            sqlite3.Binary(ripe),
+            dbstr(self.fromAddress),
+            dbstr(self.subject),
+            dbstr(self.message),
+            sqlite3.Binary(ackdata),
             int(time.time()),  # sentTime (this will never change)
             int(time.time()),  # lastActionTime
             0,  # sleepTill time. This will get set when the POW gets done.
-            'msgqueued',
+            dbstr('msgqueued'),
             0,  # retryNumber
-            'sent',  # folder
+            dbstr('sent'),  # folder
             2,  # encodingtype
             # not necessary to have a TTL higher than 2 days
             min(config.getint('bitmessagesettings', 'ttl'), 86400 * 2)
@@ -270,10 +262,9 @@ class MailchuckAccount(GatewayAccount):
 
     def settings(self):
         """settings specific to a MailchuckAccount"""
-
         self.toAddress = self.registrationAddress
         self.subject = "config"
-        self.message = QtGui.QApplication.translate(
+        self.message = _translate(
             "Mailchuck",
             """# You can use this to configure your email gateway account
 # Uncomment the setting you want to use
@@ -319,8 +310,9 @@ class MailchuckAccount(GatewayAccount):
 
     def parseMessage(self, toAddress, fromAddress, subject, message):
         """parseMessage specific to a MailchuckAccount"""
-
-        super(MailchuckAccount, self).parseMessage(toAddress, fromAddress, subject, message)
+        super(MailchuckAccount, self).parseMessage(
+            toAddress, fromAddress, subject, message
+        )
         if fromAddress == self.relayAddress:
             matches = self.regExpIncoming.search(subject)
             if matches is not None:
@@ -341,6 +333,7 @@ class MailchuckAccount(GatewayAccount):
                     self.toLabel = matches.group(1)
                     self.toAddress = matches.group(1)
         self.feedback = self.ALL_OK
-        if fromAddress == self.registrationAddress and self.subject == "Registration Request Denied":
+        if fromAddress == self.registrationAddress \
+                and self.subject == "Registration Request Denied":
             self.feedback = self.REGISTRATION_DENIED
         return self.feedback

src/bitmessageqt/address_dialogs.py

@@ -1,40 +1,40 @@
 """
 Dialogs that work with BM address.
 """
-# pylint: disable=attribute-defined-outside-init,too-few-public-methods,relative-import
+# pylint: disable=too-few-public-methods
+# https://github.com/PyCQA/pylint/issues/471
 
 import hashlib
 
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr, unic
+from qtpy import QtGui, QtWidgets
 
 import queues
-import widgets
+from bitmessageqt import widgets
 import state
-from account import AccountMixin, GatewayAccount, MailchuckAccount, accountClass
+from .account import (
+    GatewayAccount, MailchuckAccount, AccountMixin, accountClass
+)
 from addresses import addBMIfNotPresent, decodeAddress, encodeVarint
 from bmconfigparser import config as global_config
 from tr import _translate
 
 
 class AddressCheckMixin(object):
-    """Base address validation class for QT UI"""
+    """Base address validation class for Qt UI"""
 
-    def __init__(self):
+    def _setup(self):
         self.valid = False
-        QtCore.QObject.connect(  # pylint: disable=no-member
-            self.lineEditAddress,
-            QtCore.SIGNAL("textChanged(QString)"),
-            self.addressChanged)
+        self.lineEditAddress.textChanged.connect(self.addressChanged)
 
     def _onSuccess(self, addressVersion, streamNumber, ripe):
         pass
 
-    def addressChanged(self, QString):
+    def addressChanged(self, address):
         """
         Address validation callback, performs validation and gives feedback
         """
-        status, addressVersion, streamNumber, ripe = decodeAddress(
-            str(QString))
+        status, addressVersion, streamNumber, ripe = decodeAddress(ustr(address))
         self.valid = status == 'success'
         if self.valid:
             self.labelAddressCheck.setText(
@@ -79,19 +79,27 @@ class AddressCheckMixin(object):
             ))
 
 
-class AddressDataDialog(QtGui.QDialog, AddressCheckMixin):
-    """QDialog with Bitmessage address validation"""
+class AddressDataDialog(QtWidgets.QDialog, AddressCheckMixin):
+    """
+    Base class for a dialog getting BM-address data.
+    Corresponding ui-file should define two fields:
+    lineEditAddress - for the address
+    lineEditLabel - for it's label
+    After address validation the values of that fields are put into
+    the data field of the dialog.
+    """
 
     def __init__(self, parent):
         super(AddressDataDialog, self).__init__(parent)
         self.parent = parent
+        self.data = None
 
     def accept(self):
-        """Callback for QDIalog accepting value"""
+        """Callback for QDialog accepting value"""
         if self.valid:
             self.data = (
-                addBMIfNotPresent(str(self.lineEditAddress.text())),
-                str(self.lineEditLabel.text().toUtf8())
+                addBMIfNotPresent(ustr(self.lineEditAddress.text())),
+                ustr(self.lineEditLabel.text())
             )
         else:
             queues.UISignalQueue.put(('updateStatusBar', _translate(
@@ -107,12 +115,12 @@ class AddAddressDialog(AddressDataDialog):
     def __init__(self, parent=None, address=None):
         super(AddAddressDialog, self).__init__(parent)
         widgets.load('addaddressdialog.ui', self)
-        AddressCheckMixin.__init__(self)
+        self._setup()
         if address:
             self.lineEditAddress.setText(address)
 
 
-class NewAddressDialog(QtGui.QDialog):
+class NewAddressDialog(QtWidgets.QDialog):
     """QDialog for generating a new address"""
 
     def __init__(self, parent=None):
@@ -125,7 +133,7 @@ class NewAddressDialog(QtGui.QDialog):
             self.radioButtonExisting.click()
             self.comboBoxExisting.addItem(address)
         self.groupBoxDeterministic.setHidden(True)
-        QtGui.QWidget.resize(self, QtGui.QWidget.sizeHint(self))
+        QtWidgets.QWidget.resize(self, QtWidgets.QWidget.sizeHint(self))
         self.show()
 
     def accept(self):
@@ -142,13 +150,13 @@ class NewAddressDialog(QtGui.QDialog):
                     self.comboBoxExisting.currentText())[2]
             queues.addressGeneratorQueue.put((
                 'createRandomAddress', 4, streamNumberForAddress,
-                str(self.newaddresslabel.text().toUtf8()), 1, "",
+                ustr(self.newaddresslabel.text()), 1, "",
                 self.checkBoxEighteenByteRipe.isChecked()
             ))
         else:
-            if self.lineEditPassphrase.text() != \
-                    self.lineEditPassphraseAgain.text():
-                QtGui.QMessageBox.about(
+            if ustr(self.lineEditPassphrase.text()) != \
+                    ustr(self.lineEditPassphraseAgain.text()):
+                QtWidgets.QMessageBox.about(
                     self, _translate("MainWindow", "Passphrase mismatch"),
                     _translate(
                         "MainWindow",
@@ -156,7 +164,7 @@ class NewAddressDialog(QtGui.QDialog):
                         " match. Try again.")
                 )
             elif self.lineEditPassphrase.text() == "":
-                QtGui.QMessageBox.about(
+                QtWidgets.QMessageBox.about(
                     self, _translate("MainWindow", "Choose a passphrase"),
                     _translate(
                         "MainWindow", "You really do need a passphrase.")
@@ -169,7 +177,7 @@ class NewAddressDialog(QtGui.QDialog):
                     'createDeterministicAddresses', 4, streamNumberForAddress,
                     "unused deterministic address",
                     self.spinBoxNumberOfAddressesToMake.value(),
-                    self.lineEditPassphrase.text().toUtf8(),
+                    ustr(self.lineEditPassphrase.text()),
                     self.checkBoxEighteenByteRipe.isChecked()
                 ))
 
@@ -180,7 +188,8 @@ class NewSubscriptionDialog(AddressDataDialog):
     def __init__(self, parent=None):
         super(NewSubscriptionDialog, self).__init__(parent)
         widgets.load('newsubscriptiondialog.ui', self)
-        AddressCheckMixin.__init__(self)
+        self.recent = []
+        self._setup()
 
     def _onSuccess(self, addressVersion, streamNumber, ripe):
         if addressVersion <= 3:
@@ -211,22 +220,21 @@ class NewSubscriptionDialog(AddressDataDialog):
                     _translate(
                         "MainWindow",
                         "Display the %n recent broadcast(s) from this address.",
-                        None,
-                        QtCore.QCoreApplication.CodecForTr,
-                        count
+                        None, count
                     ))
 
 
-class RegenerateAddressesDialog(QtGui.QDialog):
+class RegenerateAddressesDialog(QtWidgets.QDialog):
     """QDialog for regenerating deterministic addresses"""
+
     def __init__(self, parent=None):
         super(RegenerateAddressesDialog, self).__init__(parent)
         widgets.load('regenerateaddresses.ui', self)
         self.groupBox.setTitle('')
-        QtGui.QWidget.resize(self, QtGui.QWidget.sizeHint(self))
+        QtWidgets.QWidget.resize(self, QtWidgets.QWidget.sizeHint(self))
 
 
-class SpecialAddressBehaviorDialog(QtGui.QDialog):
+class SpecialAddressBehaviorDialog(QtWidgets.QDialog):
     """
     QDialog for special address behaviour (e.g. mailing list functionality)
     """
@@ -234,7 +242,7 @@ class SpecialAddressBehaviorDialog(QtGui.QDialog):
     def __init__(self, parent=None, config=global_config):
         super(SpecialAddressBehaviorDialog, self).__init__(parent)
         widgets.load('specialaddressbehavior.ui', self)
-        self.address = parent.getCurrentAccount()
+        self.address = ustr(parent.getCurrentAccount())
         self.parent = parent
         self.config = config
 
@@ -257,12 +265,12 @@ class SpecialAddressBehaviorDialog(QtGui.QDialog):
                     self.radioButtonBehaviorMailingList.click()
                 else:
                     self.radioButtonBehaveNormalAddress.click()
-                mailingListName = config.safeGet(self.address, 'mailinglistname', '')
+                mailingListName = config.safeGet(
+                    self.address, 'mailinglistname', '')
                 self.lineEditMailingListName.setText(
-                    unicode(mailingListName, 'utf-8')
-                )
+                    unic(ustr(mailingListName)))
 
-        QtGui.QWidget.resize(self, QtGui.QWidget.sizeHint(self))
+        QtWidgets.QWidget.resize(self, QtWidgets.QWidget.sizeHint(self))
         self.show()
 
     def accept(self):
@@ -271,18 +279,18 @@ class SpecialAddressBehaviorDialog(QtGui.QDialog):
         if self.address_is_chan:
             return
         if self.radioButtonBehaveNormalAddress.isChecked():
-            self.config.set(str(self.address), 'mailinglist', 'false')
+            self.config.set(self.address, 'mailinglist', 'false')
             # Set the color to either black or grey
             if self.config.getboolean(self.address, 'enabled'):
                 self.parent.setCurrentItemColor(
-                    QtGui.QApplication.palette().text().color()
+                    QtWidgets.QApplication.palette().text().color()
                 )
             else:
                 self.parent.setCurrentItemColor(QtGui.QColor(128, 128, 128))
         else:
-            self.config.set(str(self.address), 'mailinglist', 'true')
-            self.config.set(str(self.address), 'mailinglistname', str(
-                self.lineEditMailingListName.text().toUtf8()))
+            self.config.set(self.address, 'mailinglist', 'true')
+            self.config.set(self.address, 'mailinglistname', ustr(
+                self.lineEditMailingListName.text()))
             self.parent.setCurrentItemColor(
                 QtGui.QColor(137, 4, 177))  # magenta
         self.parent.rerenderComboBoxSendFrom()
@@ -291,13 +299,15 @@ class SpecialAddressBehaviorDialog(QtGui.QDialog):
         self.parent.rerenderMessagelistToLabels()
 
 
-class EmailGatewayDialog(QtGui.QDialog):
+class EmailGatewayDialog(QtWidgets.QDialog):
     """QDialog for email gateway control"""
+
     def __init__(self, parent, config=global_config, account=None):
         super(EmailGatewayDialog, self).__init__(parent)
         widgets.load('emailgateway.ui', self)
         self.parent = parent
         self.config = config
+        self.data = None
         if account:
             self.acct = account
             self.setWindowTitle(_translate(
@@ -330,7 +340,7 @@ class EmailGatewayDialog(QtGui.QDialog):
             else:
                 self.acct = MailchuckAccount(address)
         self.lineEditEmail.setFocus()
-        QtGui.QWidget.resize(self, QtGui.QWidget.sizeHint(self))
+        QtWidgets.QWidget.resize(self, QtWidgets.QWidget.sizeHint(self))
 
     def accept(self):
         """Accept callback"""
@@ -344,7 +354,7 @@ class EmailGatewayDialog(QtGui.QDialog):
 
         if self.radioButtonRegister.isChecked() \
                 or self.radioButtonRegister.isHidden():
-            email = str(self.lineEditEmail.text().toUtf8())
+            email = ustr(self.lineEditEmail.text())
             self.acct.register(email)
             self.config.set(self.acct.fromAddress, 'label', email)
             self.config.set(self.acct.fromAddress, 'gateway', 'mailchuck')

src/bitmessageqt/addressvalidator.py

@@ -1,38 +1,36 @@
 """
-Address validator module.
+The validator for address and passphrase QLineEdits
+used in `.dialogs.NewChanDialog`.
 """
-# pylint: disable=too-many-branches,too-many-arguments
+# pylint: disable=too-many-arguments
 
-from Queue import Empty
+from six.moves.queue import Empty
 
-from PyQt4 import QtGui
+from unqstr import ustr
+from qtpy import QtGui
 
 from addresses import decodeAddress, addBMIfNotPresent
 from bmconfigparser import config
 from queues import apiAddressGeneratorReturnQueue, addressGeneratorQueue
 from tr import _translate
-from utils import str_chan
+from .utils import str_chan
 
 
 class AddressPassPhraseValidatorMixin(object):
     """Bitmessage address or passphrase validator class for Qt UI"""
     def setParams(
-            self,
-            passPhraseObject=None,
-            addressObject=None,
-            feedBackObject=None,
-            buttonBox=None,
-            addressMandatory=True,
+        self, passPhraseObject=None, addressObject=None,
+        feedBackObject=None, button=None, addressMandatory=True
     ):
-        """Initialisation"""
+        """Initialization"""
         self.addressObject = addressObject
         self.passPhraseObject = passPhraseObject
         self.feedBackObject = feedBackObject
-        self.buttonBox = buttonBox
         self.addressMandatory = addressMandatory
         self.isValid = False
         # save default text
-        self.okButtonLabel = self.buttonBox.button(QtGui.QDialogButtonBox.Ok).text()
+        self.okButton = button
+        self.okButtonLabel = button.text()
 
     def setError(self, string):
         """Indicate that the validation is pending or failed"""
@@ -43,13 +41,13 @@ class AddressPassPhraseValidatorMixin(object):
             self.feedBackObject.setStyleSheet("QLabel { color : red; }")
             self.feedBackObject.setText(string)
         self.isValid = False
-        if self.buttonBox:
-            self.buttonBox.button(QtGui.QDialogButtonBox.Ok).setEnabled(False)
+        if self.okButton:
+            self.okButton.setEnabled(False)
             if string is not None and self.feedBackObject is not None:
-                self.buttonBox.button(QtGui.QDialogButtonBox.Ok).setText(
+                self.okButton.setText(
                     _translate("AddressValidator", "Invalid"))
             else:
-                self.buttonBox.button(QtGui.QDialogButtonBox.Ok).setText(
+                self.okButton.setText(
                     _translate("AddressValidator", "Validating..."))
 
     def setOK(self, string):
@@ -61,9 +59,9 @@ class AddressPassPhraseValidatorMixin(object):
             self.feedBackObject.setStyleSheet("QLabel { }")
             self.feedBackObject.setText(string)
         self.isValid = True
-        if self.buttonBox:
-            self.buttonBox.button(QtGui.QDialogButtonBox.Ok).setEnabled(True)
-            self.buttonBox.button(QtGui.QDialogButtonBox.Ok).setText(self.okButtonLabel)
+        if self.okButton:
+            self.okButton.setEnabled(True)
+            self.okButton.setText(self.okButtonLabel)
 
     def checkQueue(self):
         """Validator queue loop"""
@@ -76,7 +74,8 @@ class AddressPassPhraseValidatorMixin(object):
 
         while True:
             try:
-                addressGeneratorReturnValue = apiAddressGeneratorReturnQueue.get(False)
+                addressGeneratorReturnValue = \
+                    apiAddressGeneratorReturnQueue.get(False)
             except Empty:
                 if gotOne:
                     break
@@ -86,96 +85,120 @@ class AddressPassPhraseValidatorMixin(object):
                 gotOne = True
 
         if not addressGeneratorReturnValue:
-            self.setError(_translate("AddressValidator", "Address already present as one of your identities."))
-            return (QtGui.QValidator.Intermediate, 0)
-        if addressGeneratorReturnValue[0] == 'chan name does not match address':
-            self.setError(
-                _translate(
-                    "AddressValidator",
-                    "Although the Bitmessage address you "
-                    "entered was valid, it doesn't match the chan name."))
-            return (QtGui.QValidator.Intermediate, 0)
-        self.setOK(_translate("MainWindow", "Passphrase and address appear to be valid."))
+            self.setError(_translate(
+                "AddressValidator",
+                "Address already present as one of your identities."
+            ))
+            return
+        if addressGeneratorReturnValue[0] == \
+                'chan name does not match address':
+            self.setError(_translate(
+                "AddressValidator",
+                "Although the Bitmessage address you entered was valid,"
+                " it doesn\'t match the chan name."
+            ))
+            return
+        self.setOK(_translate(
+            "MainWindow", "Passphrase and address appear to be valid."))
 
     def returnValid(self):
         """Return the value of whether the validation was successful"""
-        if self.isValid:
-            return QtGui.QValidator.Acceptable
-        return QtGui.QValidator.Intermediate
+        return QtGui.QValidator.Acceptable if self.isValid \
+            else QtGui.QValidator.Intermediate
 
     def validate(self, s, pos):
         """Top level validator method"""
-        if self.addressObject is None:
+        try:
+            address = ustr(self.addressObject.text())
+        except AttributeError:
             address = None
-        else:
-            address = str(self.addressObject.text().toUtf8())
-            if address == "":
-                address = None
-        if self.passPhraseObject is None:
+        try:
+            passPhrase = ustr(self.passPhraseObject.text())
+        except AttributeError:
             passPhrase = ""
-        else:
-            passPhrase = str(self.passPhraseObject.text().toUtf8())
-            if passPhrase == "":
-                passPhrase = None
 
         # no chan name
-        if passPhrase is None:
-            self.setError(_translate("AddressValidator", "Chan name/passphrase needed. You didn't enter a chan name."))
-            return (QtGui.QValidator.Intermediate, pos)
+        if not passPhrase:
+            self.setError(_translate(
+                "AddressValidator",
+                "Chan name/passphrase needed. You didn't enter a chan name."
+            ))
+            return (QtGui.QValidator.Intermediate, s, pos)
 
-        if self.addressMandatory or address is not None:
+        if self.addressMandatory or address:
             # check if address already exists:
-            if address in config.addresses():
-                self.setError(_translate("AddressValidator", "Address already present as one of your identities."))
-                return (QtGui.QValidator.Intermediate, pos)
+            if address in config.addresses(True):
+                self.setError(_translate(
+                    "AddressValidator",
+                    "Address already present as one of your identities."
+                ))
+                return (QtGui.QValidator.Intermediate, s, pos)
 
+            status = decodeAddress(address)[0]
             # version too high
-            if decodeAddress(address)[0] == 'versiontoohigh':
-                self.setError(
-                    _translate(
-                        "AddressValidator",
-                        "Address too new. Although that Bitmessage"
-                        " address might be valid, its version number"
-                        " is too new for us to handle. Perhaps you need"
-                        " to upgrade Bitmessage."))
-                return (QtGui.QValidator.Intermediate, pos)
-
+            if status == 'versiontoohigh':
+                self.setError(_translate(
+                    "AddressValidator",
+                    "Address too new. Although that Bitmessage address"
+                    " might be valid, its version number is too new"
+                    " for us to handle. Perhaps you need to upgrade"
+                    " Bitmessage."
+                ))
+                return (QtGui.QValidator.Intermediate, s, pos)
             # invalid
-            if decodeAddress(address)[0] != 'success':
-                self.setError(_translate("AddressValidator", "The Bitmessage address is not valid."))
-                return (QtGui.QValidator.Intermediate, pos)
+            if status != 'success':
+                self.setError(_translate(
+                    "AddressValidator",
+                    "The Bitmessage address is not valid."
+                ))
+                return (QtGui.QValidator.Intermediate, s, pos)
 
         # this just disables the OK button without changing the feedback text
         # but only if triggered by textEdited, not by clicking the Ok button
-        if not self.buttonBox.button(QtGui.QDialogButtonBox.Ok).hasFocus():
+        if not self.okButton.hasFocus():
             self.setError(None)
 
         # check through generator
-        if address is None:
-            addressGeneratorQueue.put(('createChan', 4, 1, str_chan + ' ' + str(passPhrase), passPhrase, False))
+        if not address:
+            addressGeneratorQueue.put((
+                'createChan', 4, 1,
+                str_chan + ' ' + passPhrase, passPhrase.encode("utf-8", "replace"), False
+            ))
         else:
-            addressGeneratorQueue.put(
-                ('joinChan', addBMIfNotPresent(address),
-                 "{} {}".format(str_chan, passPhrase), passPhrase, False))
+            addressGeneratorQueue.put((
+                'joinChan', addBMIfNotPresent(address),
+                "{} {}".format(str_chan, passPhrase), passPhrase.encode("utf-8", "replace"), False
+            ))
 
-        if self.buttonBox.button(QtGui.QDialogButtonBox.Ok).hasFocus():
-            return (self.returnValid(), pos)
-        return (QtGui.QValidator.Intermediate, pos)
+        if self.okButton.hasFocus():
+            return (self.returnValid(), s, pos)
+        else:
+            return (QtGui.QValidator.Intermediate, s, pos)
 
     def checkData(self):
         """Validator Qt signal interface"""
-        return self.validate("", 0)
+        return self.validate(u"", 0)
 
 
 class AddressValidator(QtGui.QValidator, AddressPassPhraseValidatorMixin):
     """AddressValidator class for Qt UI"""
-    def __init__(self, parent=None, passPhraseObject=None, feedBackObject=None, buttonBox=None, addressMandatory=True):
+    def __init__(
+        self, parent=None, passPhraseObject=None, feedBackObject=None,
+        button=None, addressMandatory=True
+    ):
         super(AddressValidator, self).__init__(parent)
-        self.setParams(passPhraseObject, parent, feedBackObject, buttonBox, addressMandatory)
+        self.setParams(
+            passPhraseObject, parent, feedBackObject, button,
+            addressMandatory)
 
 
 class PassPhraseValidator(QtGui.QValidator, AddressPassPhraseValidatorMixin):
     """PassPhraseValidator class for Qt UI"""
-    def __init__(self, parent=None, addressObject=None, feedBackObject=None, buttonBox=None, addressMandatory=False):
+    def __init__(
+        self, parent=None, addressObject=None, feedBackObject=None,
+        button=None, addressMandatory=False
+    ):
         super(PassPhraseValidator, self).__init__(parent)
-        self.setParams(parent, addressObject, feedBackObject, buttonBox, addressMandatory)
+        self.setParams(
+            parent, addressObject, feedBackObject, button,
+            addressMandatory)

src/bitmessageqt/bitmessage_icons_rc.py

@@ -7,9 +7,9 @@
 #
 # WARNING! All changes made in this file will be lost!
 
-from PyQt4 import QtCore
+from qtpy import QtCore
 
-qt_resource_data = "\
+qt_resource_data = b"\
 \x00\x00\x03\x66\
 \x89\
 \x50\x4e\x47\x0d\x0a\x1a\x0a\x00\x00\x00\x0d\x49\x48\x44\x52\x00\
@@ -1534,7 +1534,7 @@ qt_resource_data = "\
 \x82\
 "
 
-qt_resource_name = "\
+qt_resource_name = b"\
 \x00\x09\
 \x0c\x78\x54\x88\
 \x00\x6e\
@@ -1639,7 +1639,7 @@ qt_resource_name = "\
 \x00\x70\x00\x6e\x00\x67\
 "
 
-qt_resource_struct = "\
+qt_resource_struct = b"\
 \x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x01\
 \x00\x00\x00\x00\x00\x02\x00\x00\x00\x01\x00\x00\x00\x02\
 \x00\x00\x00\x18\x00\x02\x00\x00\x00\x15\x00\x00\x00\x03\
@@ -1666,10 +1666,15 @@ qt_resource_struct = "\
 \x00\x00\x01\xe6\x00\x00\x00\x00\x00\x01\x00\x00\x34\xdf\
 "
 
+
 def qInitResources():
-    QtCore.qRegisterResourceData(0x01, qt_resource_struct, qt_resource_name, qt_resource_data)
+    QtCore.qRegisterResourceData(
+        0x01, qt_resource_struct, qt_resource_name, qt_resource_data)
+
 
 def qCleanupResources():
-    QtCore.qUnregisterResourceData(0x01, qt_resource_struct, qt_resource_name, qt_resource_data)
+    QtCore.qUnregisterResourceData(
+        0x01, qt_resource_struct, qt_resource_name, qt_resource_data)
+
 
 qInitResources()

src/bitmessageqt/bitmessageui.py

@@ -1,59 +1,32 @@
-# -*- coding: utf-8 -*-
+# pylint: skip-file
+# flake8: noqa
 
-# Form implementation generated from reading ui file 'bitmessageui.ui'
-#
-# Created: Mon Mar 23 22:18:07 2015
-#      by: PyQt4 UI code generator 4.10.4
-#
-# WARNING! All changes made in this file will be lost!
-
-from PyQt4 import QtCore, QtGui
+from qtpy import QtCore, QtGui, QtWidgets
+from tr import _translate
 from bmconfigparser import config
-from foldertree import AddressBookCompleter
-from messageview import MessageView
-from messagecompose import MessageCompose
-import settingsmixin
-from networkstatus import NetworkStatus
-from blacklist import Blacklist
-
-try:
-    _fromUtf8 = QtCore.QString.fromUtf8
-except AttributeError:
-    def _fromUtf8(s):
-        return s
-
-try:
-    _encoding = QtGui.QApplication.UnicodeUTF8
-
-    def _translate(context, text, disambig, encoding=QtCore.QCoreApplication.CodecForTr, n=None):
-        if n is None:
-            return QtGui.QApplication.translate(context, text, disambig, _encoding)
-        else:
-            return QtGui.QApplication.translate(context, text, disambig, _encoding, n)
-except AttributeError:
-    def _translate(context, text, disambig, encoding=QtCore.QCoreApplication.CodecForTr, n=None):
-        if n is None:
-            return QtGui.QApplication.translate(context, text, disambig)
-        else:
-            return QtGui.QApplication.translate(context, text, disambig, QtCore.QCoreApplication.CodecForTr, n)
+from .foldertree import AddressBookCompleter
+from .messageview import MessageView
+from .messagecompose import MessageCompose
+from bitmessageqt import settingsmixin
+from .networkstatus import NetworkStatus
+from .blacklist import Blacklist
+from bitmessageqt import bitmessage_icons_rc
 
 
 class Ui_MainWindow(object):
     def setupUi(self, MainWindow):
-        MainWindow.setObjectName(_fromUtf8("MainWindow"))
+        MainWindow.setObjectName("MainWindow")
         MainWindow.resize(885, 580)
         icon = QtGui.QIcon()
-        icon.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/can-icon-24px.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off
-        )
+        icon.addPixmap(QtGui.QPixmap(":/newPrefix/images/can-icon-24px.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
         MainWindow.setWindowIcon(icon)
-        MainWindow.setTabShape(QtGui.QTabWidget.Rounded)
-        self.centralwidget = QtGui.QWidget(MainWindow)
-        self.centralwidget.setObjectName(_fromUtf8("centralwidget"))
-        self.gridLayout_10 = QtGui.QGridLayout(self.centralwidget)
-        self.gridLayout_10.setObjectName(_fromUtf8("gridLayout_10"))
-        self.tabWidget = QtGui.QTabWidget(self.centralwidget)
-        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.Expanding, QtGui.QSizePolicy.Expanding)
+        MainWindow.setTabShape(QtWidgets.QTabWidget.Rounded)
+        self.centralwidget = QtWidgets.QWidget(MainWindow)
+        self.centralwidget.setObjectName("centralwidget")
+        self.gridLayout_10 = QtWidgets.QGridLayout(self.centralwidget)
+        self.gridLayout_10.setObjectName("gridLayout_10")
+        self.tabWidget = QtWidgets.QTabWidget(self.centralwidget)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Expanding)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.tabWidget.sizePolicy().hasHeightForWidth())
@@ -61,32 +34,30 @@ class Ui_MainWindow(object):
         self.tabWidget.setMinimumSize(QtCore.QSize(0, 0))
         self.tabWidget.setBaseSize(QtCore.QSize(0, 0))
         font = QtGui.QFont()
-        base_size = QtGui.QApplication.instance().font().pointSize()
+        base_size = QtWidgets.QApplication.instance().font().pointSize()
         font.setPointSize(int(base_size * 0.75))
         self.tabWidget.setFont(font)
-        self.tabWidget.setTabPosition(QtGui.QTabWidget.North)
-        self.tabWidget.setTabShape(QtGui.QTabWidget.Rounded)
-        self.tabWidget.setObjectName(_fromUtf8("tabWidget"))
-        self.inbox = QtGui.QWidget()
-        self.inbox.setObjectName(_fromUtf8("inbox"))
-        self.gridLayout = QtGui.QGridLayout(self.inbox)
-        self.gridLayout.setObjectName(_fromUtf8("gridLayout"))
+        self.tabWidget.setTabPosition(QtWidgets.QTabWidget.North)
+        self.tabWidget.setTabShape(QtWidgets.QTabWidget.Rounded)
+        self.tabWidget.setObjectName("tabWidget")
+        self.inbox = QtWidgets.QWidget()
+        self.inbox.setObjectName("inbox")
+        self.gridLayout = QtWidgets.QGridLayout(self.inbox)
+        self.gridLayout.setObjectName("gridLayout")
         self.horizontalSplitter_3 = settingsmixin.SSplitter()
-        self.horizontalSplitter_3.setObjectName(_fromUtf8("horizontalSplitter_3"))
+        self.horizontalSplitter_3.setObjectName("horizontalSplitter_3")
         self.verticalSplitter_12 = settingsmixin.SSplitter()
-        self.verticalSplitter_12.setObjectName(_fromUtf8("verticalSplitter_12"))
+        self.verticalSplitter_12.setObjectName("verticalSplitter_12")
         self.verticalSplitter_12.setOrientation(QtCore.Qt.Vertical)
         self.treeWidgetYourIdentities = settingsmixin.STreeWidget(self.inbox)
-        self.treeWidgetYourIdentities.setObjectName(_fromUtf8("treeWidgetYourIdentities"))
+        self.treeWidgetYourIdentities.setObjectName("treeWidgetYourIdentities")
         self.treeWidgetYourIdentities.resize(200, self.treeWidgetYourIdentities.height())
         icon1 = QtGui.QIcon()
-        icon1.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/identities.png")), QtGui.QIcon.Selected, QtGui.QIcon.Off
-        )
+        icon1.addPixmap(QtGui.QPixmap(":/newPrefix/images/identities.png"), QtGui.QIcon.Selected, QtGui.QIcon.Off)
         self.treeWidgetYourIdentities.headerItem().setIcon(0, icon1)
         self.verticalSplitter_12.addWidget(self.treeWidgetYourIdentities)
-        self.pushButtonNewAddress = QtGui.QPushButton(self.inbox)
-        self.pushButtonNewAddress.setObjectName(_fromUtf8("pushButtonNewAddress"))
+        self.pushButtonNewAddress = QtWidgets.QPushButton(self.inbox)
+        self.pushButtonNewAddress.setObjectName("pushButtonNewAddress")
         self.pushButtonNewAddress.resize(200, self.pushButtonNewAddress.height())
         self.verticalSplitter_12.addWidget(self.pushButtonNewAddress)
         self.verticalSplitter_12.setStretchFactor(0, 1)
@@ -96,21 +67,21 @@ class Ui_MainWindow(object):
         self.verticalSplitter_12.handle(1).setEnabled(False)
         self.horizontalSplitter_3.addWidget(self.verticalSplitter_12)
         self.verticalSplitter_7 = settingsmixin.SSplitter()
-        self.verticalSplitter_7.setObjectName(_fromUtf8("verticalSplitter_7"))
+        self.verticalSplitter_7.setObjectName("verticalSplitter_7")
         self.verticalSplitter_7.setOrientation(QtCore.Qt.Vertical)
-        self.horizontalSplitterSearch = QtGui.QSplitter()
-        self.horizontalSplitterSearch.setObjectName(_fromUtf8("horizontalSplitterSearch"))
-        self.inboxSearchLineEdit = QtGui.QLineEdit(self.inbox)
-        self.inboxSearchLineEdit.setObjectName(_fromUtf8("inboxSearchLineEdit"))
+        self.horizontalSplitterSearch = QtWidgets.QSplitter()
+        self.horizontalSplitterSearch.setObjectName("horizontalSplitterSearch")
+        self.inboxSearchLineEdit = QtWidgets.QLineEdit(self.inbox)
+        self.inboxSearchLineEdit.setObjectName("inboxSearchLineEdit")
         self.horizontalSplitterSearch.addWidget(self.inboxSearchLineEdit)
-        self.inboxSearchOption = QtGui.QComboBox(self.inbox)
-        self.inboxSearchOption.setObjectName(_fromUtf8("inboxSearchOption"))
-        self.inboxSearchOption.addItem(_fromUtf8(""))
-        self.inboxSearchOption.addItem(_fromUtf8(""))
-        self.inboxSearchOption.addItem(_fromUtf8(""))
-        self.inboxSearchOption.addItem(_fromUtf8(""))
-        self.inboxSearchOption.addItem(_fromUtf8(""))
-        self.inboxSearchOption.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
+        self.inboxSearchOption = QtWidgets.QComboBox(self.inbox)
+        self.inboxSearchOption.setObjectName("inboxSearchOption")
+        self.inboxSearchOption.addItem("")
+        self.inboxSearchOption.addItem("")
+        self.inboxSearchOption.addItem("")
+        self.inboxSearchOption.addItem("")
+        self.inboxSearchOption.addItem("")
+        self.inboxSearchOption.setSizeAdjustPolicy(QtWidgets.QComboBox.AdjustToContents)
         self.inboxSearchOption.setCurrentIndex(3)
         self.horizontalSplitterSearch.addWidget(self.inboxSearchOption)
         self.horizontalSplitterSearch.handle(1).setEnabled(False)
@@ -118,21 +89,21 @@ class Ui_MainWindow(object):
         self.horizontalSplitterSearch.setStretchFactor(1, 0)
         self.verticalSplitter_7.addWidget(self.horizontalSplitterSearch)
         self.tableWidgetInbox = settingsmixin.STableWidget(self.inbox)
-        self.tableWidgetInbox.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
+        self.tableWidgetInbox.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
         self.tableWidgetInbox.setAlternatingRowColors(True)
-        self.tableWidgetInbox.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
-        self.tableWidgetInbox.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
+        self.tableWidgetInbox.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
+        self.tableWidgetInbox.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
         self.tableWidgetInbox.setWordWrap(False)
-        self.tableWidgetInbox.setObjectName(_fromUtf8("tableWidgetInbox"))
+        self.tableWidgetInbox.setObjectName("tableWidgetInbox")
         self.tableWidgetInbox.setColumnCount(4)
         self.tableWidgetInbox.setRowCount(0)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInbox.setHorizontalHeaderItem(0, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInbox.setHorizontalHeaderItem(1, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInbox.setHorizontalHeaderItem(2, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInbox.setHorizontalHeaderItem(3, item)
         self.tableWidgetInbox.horizontalHeader().setCascadingSectionResizes(True)
         self.tableWidgetInbox.horizontalHeader().setDefaultSectionSize(200)
@@ -146,7 +117,7 @@ class Ui_MainWindow(object):
         self.textEditInboxMessage = MessageView(self.inbox)
         self.textEditInboxMessage.setBaseSize(QtCore.QSize(0, 500))
         self.textEditInboxMessage.setReadOnly(True)
-        self.textEditInboxMessage.setObjectName(_fromUtf8("textEditInboxMessage"))
+        self.textEditInboxMessage.setObjectName("textEditInboxMessage")
         self.verticalSplitter_7.addWidget(self.textEditInboxMessage)
         self.verticalSplitter_7.setStretchFactor(0, 0)
         self.verticalSplitter_7.setStretchFactor(1, 1)
@@ -162,52 +133,51 @@ class Ui_MainWindow(object):
         self.horizontalSplitter_3.setCollapsible(1, False)
         self.gridLayout.addWidget(self.horizontalSplitter_3)
         icon2 = QtGui.QIcon()
-        icon2.addPixmap(QtGui.QPixmap(_fromUtf8(":/newPrefix/images/inbox.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
-        self.tabWidget.addTab(self.inbox, icon2, _fromUtf8(""))
-        self.send = QtGui.QWidget()
-        self.send.setObjectName(_fromUtf8("send"))
-        self.gridLayout_7 = QtGui.QGridLayout(self.send)
-        self.gridLayout_7.setObjectName(_fromUtf8("gridLayout_7"))
+        icon2.addPixmap(QtGui.QPixmap(":/newPrefix/images/inbox.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.tabWidget.addTab(self.inbox, icon2, "")
+        self.send = QtWidgets.QWidget()
+        self.send.setObjectName("send")
+        self.gridLayout_7 = QtWidgets.QGridLayout(self.send)
+        self.gridLayout_7.setObjectName("gridLayout_7")
         self.horizontalSplitter = settingsmixin.SSplitter()
-        self.horizontalSplitter.setObjectName(_fromUtf8("horizontalSplitter"))
+        self.horizontalSplitter.setObjectName("horizontalSplitter")
         self.verticalSplitter_2 = settingsmixin.SSplitter()
-        self.verticalSplitter_2.setObjectName(_fromUtf8("verticalSplitter_2"))
+        self.verticalSplitter_2.setObjectName("verticalSplitter_2")
         self.verticalSplitter_2.setOrientation(QtCore.Qt.Vertical)
         self.tableWidgetAddressBook = settingsmixin.STableWidget(self.send)
         self.tableWidgetAddressBook.setAlternatingRowColors(True)
-        self.tableWidgetAddressBook.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
-        self.tableWidgetAddressBook.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
-        self.tableWidgetAddressBook.setObjectName(_fromUtf8("tableWidgetAddressBook"))
+        self.tableWidgetAddressBook.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
+        self.tableWidgetAddressBook.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
+        self.tableWidgetAddressBook.setObjectName("tableWidgetAddressBook")
         self.tableWidgetAddressBook.setColumnCount(2)
         self.tableWidgetAddressBook.setRowCount(0)
         self.tableWidgetAddressBook.resize(200, self.tableWidgetAddressBook.height())
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         icon3 = QtGui.QIcon()
-        icon3.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/addressbook.png")), QtGui.QIcon.Selected, QtGui.QIcon.Off
-        )
+        icon3.addPixmap(QtGui.QPixmap(":/newPrefix/images/addressbook.png"), QtGui.QIcon.Selected, QtGui.QIcon.Off)
         item.setIcon(icon3)
         self.tableWidgetAddressBook.setHorizontalHeaderItem(0, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetAddressBook.setHorizontalHeaderItem(1, item)
         self.tableWidgetAddressBook.horizontalHeader().setCascadingSectionResizes(True)
         self.tableWidgetAddressBook.horizontalHeader().setDefaultSectionSize(200)
         self.tableWidgetAddressBook.horizontalHeader().setHighlightSections(False)
         self.tableWidgetAddressBook.horizontalHeader().setStretchLastSection(True)
         self.tableWidgetAddressBook.verticalHeader().setVisible(False)
+        self.tableWidgetAddressBook.setWordWrap(False)
         self.verticalSplitter_2.addWidget(self.tableWidgetAddressBook)
         self.addressBookCompleter = AddressBookCompleter()
-        self.addressBookCompleter.setCompletionMode(QtGui.QCompleter.PopupCompletion)
+        self.addressBookCompleter.setCompletionMode(QtWidgets.QCompleter.PopupCompletion)
         self.addressBookCompleter.setCaseSensitivity(QtCore.Qt.CaseInsensitive)
-        self.addressBookCompleterModel = QtGui.QStringListModel()
+        self.addressBookCompleterModel = QtCore.QStringListModel()
         self.addressBookCompleter.setModel(self.addressBookCompleterModel)
-        self.pushButtonAddAddressBook = QtGui.QPushButton(self.send)
-        self.pushButtonAddAddressBook.setObjectName(_fromUtf8("pushButtonAddAddressBook"))
+        self.pushButtonAddAddressBook = QtWidgets.QPushButton(self.send)
+        self.pushButtonAddAddressBook.setObjectName("pushButtonAddAddressBook")
         self.pushButtonAddAddressBook.resize(200, self.pushButtonAddAddressBook.height())
         self.verticalSplitter_2.addWidget(self.pushButtonAddAddressBook)
-        self.pushButtonFetchNamecoinID = QtGui.QPushButton(self.send)
+        self.pushButtonFetchNamecoinID = QtWidgets.QPushButton(self.send)
         self.pushButtonFetchNamecoinID.resize(200, self.pushButtonFetchNamecoinID.height())
-        self.pushButtonFetchNamecoinID.setObjectName(_fromUtf8("pushButtonFetchNamecoinID"))
+        self.pushButtonFetchNamecoinID.setObjectName("pushButtonFetchNamecoinID")
         self.verticalSplitter_2.addWidget(self.pushButtonFetchNamecoinID)
         self.verticalSplitter_2.setStretchFactor(0, 1)
         self.verticalSplitter_2.setStretchFactor(1, 0)
@@ -219,45 +189,45 @@ class Ui_MainWindow(object):
         self.verticalSplitter_2.handle(2).setEnabled(False)
         self.horizontalSplitter.addWidget(self.verticalSplitter_2)
         self.verticalSplitter = settingsmixin.SSplitter()
-        self.verticalSplitter.setObjectName(_fromUtf8("verticalSplitter"))
+        self.verticalSplitter.setObjectName("verticalSplitter")
         self.verticalSplitter.setOrientation(QtCore.Qt.Vertical)
-        self.tabWidgetSend = QtGui.QTabWidget(self.send)
-        self.tabWidgetSend.setObjectName(_fromUtf8("tabWidgetSend"))
-        self.sendDirect = QtGui.QWidget()
-        self.sendDirect.setObjectName(_fromUtf8("sendDirect"))
-        self.gridLayout_8 = QtGui.QGridLayout(self.sendDirect)
-        self.gridLayout_8.setObjectName(_fromUtf8("gridLayout_8"))
+        self.tabWidgetSend = QtWidgets.QTabWidget(self.send)
+        self.tabWidgetSend.setObjectName("tabWidgetSend")
+        self.sendDirect = QtWidgets.QWidget()
+        self.sendDirect.setObjectName("sendDirect")
+        self.gridLayout_8 = QtWidgets.QGridLayout(self.sendDirect)
+        self.gridLayout_8.setObjectName("gridLayout_8")
         self.verticalSplitter_5 = settingsmixin.SSplitter()
-        self.verticalSplitter_5.setObjectName(_fromUtf8("verticalSplitter_5"))
+        self.verticalSplitter_5.setObjectName("verticalSplitter_5")
         self.verticalSplitter_5.setOrientation(QtCore.Qt.Vertical)
-        self.gridLayout_2 = QtGui.QGridLayout()
-        self.gridLayout_2.setObjectName(_fromUtf8("gridLayout_2"))
-        self.label_3 = QtGui.QLabel(self.sendDirect)
-        self.label_3.setObjectName(_fromUtf8("label_3"))
+        self.gridLayout_2 = QtWidgets.QGridLayout()
+        self.gridLayout_2.setObjectName("gridLayout_2")
+        self.label_3 = QtWidgets.QLabel(self.sendDirect)
+        self.label_3.setObjectName("label_3")
         self.gridLayout_2.addWidget(self.label_3, 2, 0, 1, 1)
-        self.label_2 = QtGui.QLabel(self.sendDirect)
-        self.label_2.setObjectName(_fromUtf8("label_2"))
+        self.label_2 = QtWidgets.QLabel(self.sendDirect)
+        self.label_2.setObjectName("label_2")
         self.gridLayout_2.addWidget(self.label_2, 0, 0, 1, 1)
-        self.lineEditSubject = QtGui.QLineEdit(self.sendDirect)
-        self.lineEditSubject.setText(_fromUtf8(""))
-        self.lineEditSubject.setObjectName(_fromUtf8("lineEditSubject"))
+        self.lineEditSubject = QtWidgets.QLineEdit(self.sendDirect)
+        self.lineEditSubject.setText("")
+        self.lineEditSubject.setObjectName("lineEditSubject")
         self.gridLayout_2.addWidget(self.lineEditSubject, 2, 1, 1, 1)
-        self.label = QtGui.QLabel(self.sendDirect)
-        self.label.setObjectName(_fromUtf8("label"))
+        self.label = QtWidgets.QLabel(self.sendDirect)
+        self.label.setObjectName("label")
         self.gridLayout_2.addWidget(self.label, 1, 0, 1, 1)
-        self.comboBoxSendFrom = QtGui.QComboBox(self.sendDirect)
+        self.comboBoxSendFrom = QtWidgets.QComboBox(self.sendDirect)
         self.comboBoxSendFrom.setMinimumSize(QtCore.QSize(300, 0))
-        self.comboBoxSendFrom.setObjectName(_fromUtf8("comboBoxSendFrom"))
+        self.comboBoxSendFrom.setObjectName("comboBoxSendFrom")
         self.gridLayout_2.addWidget(self.comboBoxSendFrom, 0, 1, 1, 1)
-        self.lineEditTo = QtGui.QLineEdit(self.sendDirect)
-        self.lineEditTo.setObjectName(_fromUtf8("lineEditTo"))
+        self.lineEditTo = QtWidgets.QLineEdit(self.sendDirect)
+        self.lineEditTo.setObjectName("lineEditTo")
         self.gridLayout_2.addWidget(self.lineEditTo, 1, 1, 1, 1)
         self.lineEditTo.setCompleter(self.addressBookCompleter)
-        self.gridLayout_2_Widget = QtGui.QWidget()
+        self.gridLayout_2_Widget = QtWidgets.QWidget()
         self.gridLayout_2_Widget.setLayout(self.gridLayout_2)
         self.verticalSplitter_5.addWidget(self.gridLayout_2_Widget)
         self.textEditMessage = MessageCompose(self.sendDirect)
-        self.textEditMessage.setObjectName(_fromUtf8("textEditMessage"))
+        self.textEditMessage.setObjectName("textEditMessage")
         self.verticalSplitter_5.addWidget(self.textEditMessage)
         self.verticalSplitter_5.setStretchFactor(0, 0)
         self.verticalSplitter_5.setStretchFactor(1, 1)
@@ -265,35 +235,35 @@ class Ui_MainWindow(object):
         self.verticalSplitter_5.setCollapsible(1, False)
         self.verticalSplitter_5.handle(1).setEnabled(False)
         self.gridLayout_8.addWidget(self.verticalSplitter_5, 0, 0, 1, 1)
-        self.tabWidgetSend.addTab(self.sendDirect, _fromUtf8(""))
-        self.sendBroadcast = QtGui.QWidget()
-        self.sendBroadcast.setObjectName(_fromUtf8("sendBroadcast"))
-        self.gridLayout_9 = QtGui.QGridLayout(self.sendBroadcast)
-        self.gridLayout_9.setObjectName(_fromUtf8("gridLayout_9"))
+        self.tabWidgetSend.addTab(self.sendDirect, "")
+        self.sendBroadcast = QtWidgets.QWidget()
+        self.sendBroadcast.setObjectName("sendBroadcast")
+        self.gridLayout_9 = QtWidgets.QGridLayout(self.sendBroadcast)
+        self.gridLayout_9.setObjectName("gridLayout_9")
         self.verticalSplitter_6 = settingsmixin.SSplitter()
-        self.verticalSplitter_6.setObjectName(_fromUtf8("verticalSplitter_6"))
+        self.verticalSplitter_6.setObjectName("verticalSplitter_6")
         self.verticalSplitter_6.setOrientation(QtCore.Qt.Vertical)
-        self.gridLayout_5 = QtGui.QGridLayout()
-        self.gridLayout_5.setObjectName(_fromUtf8("gridLayout_5"))
-        self.label_8 = QtGui.QLabel(self.sendBroadcast)
-        self.label_8.setObjectName(_fromUtf8("label_8"))
+        self.gridLayout_5 = QtWidgets.QGridLayout()
+        self.gridLayout_5.setObjectName("gridLayout_5")
+        self.label_8 = QtWidgets.QLabel(self.sendBroadcast)
+        self.label_8.setObjectName("label_8")
         self.gridLayout_5.addWidget(self.label_8, 0, 0, 1, 1)
-        self.lineEditSubjectBroadcast = QtGui.QLineEdit(self.sendBroadcast)
-        self.lineEditSubjectBroadcast.setText(_fromUtf8(""))
-        self.lineEditSubjectBroadcast.setObjectName(_fromUtf8("lineEditSubjectBroadcast"))
+        self.lineEditSubjectBroadcast = QtWidgets.QLineEdit(self.sendBroadcast)
+        self.lineEditSubjectBroadcast.setText("")
+        self.lineEditSubjectBroadcast.setObjectName("lineEditSubjectBroadcast")
         self.gridLayout_5.addWidget(self.lineEditSubjectBroadcast, 1, 1, 1, 1)
-        self.label_7 = QtGui.QLabel(self.sendBroadcast)
-        self.label_7.setObjectName(_fromUtf8("label_7"))
+        self.label_7 = QtWidgets.QLabel(self.sendBroadcast)
+        self.label_7.setObjectName("label_7")
         self.gridLayout_5.addWidget(self.label_7, 1, 0, 1, 1)
-        self.comboBoxSendFromBroadcast = QtGui.QComboBox(self.sendBroadcast)
+        self.comboBoxSendFromBroadcast = QtWidgets.QComboBox(self.sendBroadcast)
         self.comboBoxSendFromBroadcast.setMinimumSize(QtCore.QSize(300, 0))
-        self.comboBoxSendFromBroadcast.setObjectName(_fromUtf8("comboBoxSendFromBroadcast"))
+        self.comboBoxSendFromBroadcast.setObjectName("comboBoxSendFromBroadcast")
         self.gridLayout_5.addWidget(self.comboBoxSendFromBroadcast, 0, 1, 1, 1)
-        self.gridLayout_5_Widget = QtGui.QWidget()
+        self.gridLayout_5_Widget = QtWidgets.QWidget()
         self.gridLayout_5_Widget.setLayout(self.gridLayout_5)
         self.verticalSplitter_6.addWidget(self.gridLayout_5_Widget)
         self.textEditMessageBroadcast = MessageCompose(self.sendBroadcast)
-        self.textEditMessageBroadcast.setObjectName(_fromUtf8("textEditMessageBroadcast"))
+        self.textEditMessageBroadcast.setObjectName("textEditMessageBroadcast")
         self.verticalSplitter_6.addWidget(self.textEditMessageBroadcast)
         self.verticalSplitter_6.setStretchFactor(0, 0)
         self.verticalSplitter_6.setStretchFactor(1, 1)
@@ -301,15 +271,15 @@ class Ui_MainWindow(object):
         self.verticalSplitter_6.setCollapsible(1, False)
         self.verticalSplitter_6.handle(1).setEnabled(False)
         self.gridLayout_9.addWidget(self.verticalSplitter_6, 0, 0, 1, 1)
-        self.tabWidgetSend.addTab(self.sendBroadcast, _fromUtf8(""))
+        self.tabWidgetSend.addTab(self.sendBroadcast, "")
         self.verticalSplitter.addWidget(self.tabWidgetSend)
-        self.tTLContainer = QtGui.QWidget()
-        self.tTLContainer.setSizePolicy(QtGui.QSizePolicy.MinimumExpanding, QtGui.QSizePolicy.Fixed)
-        self.horizontalLayout_5 = QtGui.QHBoxLayout()
+        self.tTLContainer = QtWidgets.QWidget()
+        self.tTLContainer.setSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed)
+        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
         self.tTLContainer.setLayout(self.horizontalLayout_5)
-        self.horizontalLayout_5.setObjectName(_fromUtf8("horizontalLayout_5"))
-        self.pushButtonTTL = QtGui.QPushButton(self.send)
-        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.MinimumExpanding, QtGui.QSizePolicy.Fixed)
+        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
+        self.pushButtonTTL = QtWidgets.QPushButton(self.send)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.pushButtonTTL.sizePolicy().hasHeightForWidth())
@@ -329,29 +299,29 @@ class Ui_MainWindow(object):
         font.setUnderline(True)
         self.pushButtonTTL.setFont(font)
         self.pushButtonTTL.setFlat(True)
-        self.pushButtonTTL.setObjectName(_fromUtf8("pushButtonTTL"))
+        self.pushButtonTTL.setObjectName("pushButtonTTL")
         self.horizontalLayout_5.addWidget(self.pushButtonTTL, 0, QtCore.Qt.AlignRight)
-        self.horizontalSliderTTL = QtGui.QSlider(self.send)
+        self.horizontalSliderTTL = QtWidgets.QSlider(self.send)
         self.horizontalSliderTTL.setMinimumSize(QtCore.QSize(70, 0))
         self.horizontalSliderTTL.setOrientation(QtCore.Qt.Horizontal)
         self.horizontalSliderTTL.setInvertedAppearance(False)
         self.horizontalSliderTTL.setInvertedControls(False)
-        self.horizontalSliderTTL.setObjectName(_fromUtf8("horizontalSliderTTL"))
+        self.horizontalSliderTTL.setObjectName("horizontalSliderTTL")
         self.horizontalLayout_5.addWidget(self.horizontalSliderTTL, 0, QtCore.Qt.AlignLeft)
-        self.labelHumanFriendlyTTLDescription = QtGui.QLabel(self.send)
-        sizePolicy = QtGui.QSizePolicy(QtGui.QSizePolicy.MinimumExpanding, QtGui.QSizePolicy.Fixed)
+        self.labelHumanFriendlyTTLDescription = QtWidgets.QLabel(self.send)
+        sizePolicy = QtWidgets.QSizePolicy(QtWidgets.QSizePolicy.MinimumExpanding, QtWidgets.QSizePolicy.Fixed)
         sizePolicy.setHorizontalStretch(0)
         sizePolicy.setVerticalStretch(0)
         sizePolicy.setHeightForWidth(self.labelHumanFriendlyTTLDescription.sizePolicy().hasHeightForWidth())
         self.labelHumanFriendlyTTLDescription.setSizePolicy(sizePolicy)
         self.labelHumanFriendlyTTLDescription.setMinimumSize(QtCore.QSize(45, 0))
-        self.labelHumanFriendlyTTLDescription.setObjectName(_fromUtf8("labelHumanFriendlyTTLDescription"))
+        self.labelHumanFriendlyTTLDescription.setObjectName("labelHumanFriendlyTTLDescription")
         self.horizontalLayout_5.addWidget(self.labelHumanFriendlyTTLDescription, 1, QtCore.Qt.AlignLeft)
-        self.pushButtonClear = QtGui.QPushButton(self.send)
-        self.pushButtonClear.setObjectName(_fromUtf8("pushButtonClear"))
+        self.pushButtonClear = QtWidgets.QPushButton(self.send)
+        self.pushButtonClear.setObjectName("pushButtonClear")
         self.horizontalLayout_5.addWidget(self.pushButtonClear, 0, QtCore.Qt.AlignRight)
-        self.pushButtonSend = QtGui.QPushButton(self.send)
-        self.pushButtonSend.setObjectName(_fromUtf8("pushButtonSend"))
+        self.pushButtonSend = QtWidgets.QPushButton(self.send)
+        self.pushButtonSend.setObjectName("pushButtonSend")
         self.horizontalLayout_5.addWidget(self.pushButtonSend, 0, QtCore.Qt.AlignRight)
         self.horizontalSliderTTL.setMaximumSize(QtCore.QSize(105, self.pushButtonSend.height()))
         self.verticalSplitter.addWidget(self.tTLContainer)
@@ -368,31 +338,29 @@ class Ui_MainWindow(object):
         self.horizontalSplitter.setCollapsible(1, False)
         self.gridLayout_7.addWidget(self.horizontalSplitter, 0, 0, 1, 1)
         icon4 = QtGui.QIcon()
-        icon4.addPixmap(QtGui.QPixmap(_fromUtf8(":/newPrefix/images/send.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off)
-        self.tabWidget.addTab(self.send, icon4, _fromUtf8(""))
-        self.subscriptions = QtGui.QWidget()
-        self.subscriptions.setObjectName(_fromUtf8("subscriptions"))
-        self.gridLayout_3 = QtGui.QGridLayout(self.subscriptions)
-        self.gridLayout_3.setObjectName(_fromUtf8("gridLayout_3"))
+        icon4.addPixmap(QtGui.QPixmap(":/newPrefix/images/send.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.tabWidget.addTab(self.send, icon4, "")
+        self.subscriptions = QtWidgets.QWidget()
+        self.subscriptions.setObjectName("subscriptions")
+        self.gridLayout_3 = QtWidgets.QGridLayout(self.subscriptions)
+        self.gridLayout_3.setObjectName("gridLayout_3")
         self.horizontalSplitter_4 = settingsmixin.SSplitter()
-        self.horizontalSplitter_4.setObjectName(_fromUtf8("horizontalSplitter_4"))
+        self.horizontalSplitter_4.setObjectName("horizontalSplitter_4")
         self.verticalSplitter_3 = settingsmixin.SSplitter()
-        self.verticalSplitter_3.setObjectName(_fromUtf8("verticalSplitter_3"))
+        self.verticalSplitter_3.setObjectName("verticalSplitter_3")
         self.verticalSplitter_3.setOrientation(QtCore.Qt.Vertical)
         self.treeWidgetSubscriptions = settingsmixin.STreeWidget(self.subscriptions)
         self.treeWidgetSubscriptions.setAlternatingRowColors(True)
-        self.treeWidgetSubscriptions.setSelectionMode(QtGui.QAbstractItemView.SingleSelection)
-        self.treeWidgetSubscriptions.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
-        self.treeWidgetSubscriptions.setObjectName(_fromUtf8("treeWidgetSubscriptions"))
+        self.treeWidgetSubscriptions.setSelectionMode(QtWidgets.QAbstractItemView.SingleSelection)
+        self.treeWidgetSubscriptions.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
+        self.treeWidgetSubscriptions.setObjectName("treeWidgetSubscriptions")
         self.treeWidgetSubscriptions.resize(200, self.treeWidgetSubscriptions.height())
         icon5 = QtGui.QIcon()
-        icon5.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/subscriptions.png")), QtGui.QIcon.Selected, QtGui.QIcon.Off
-        )
+        icon5.addPixmap(QtGui.QPixmap(":/newPrefix/images/subscriptions.png"), QtGui.QIcon.Selected, QtGui.QIcon.Off)
         self.treeWidgetSubscriptions.headerItem().setIcon(0, icon5)
         self.verticalSplitter_3.addWidget(self.treeWidgetSubscriptions)
-        self.pushButtonAddSubscription = QtGui.QPushButton(self.subscriptions)
-        self.pushButtonAddSubscription.setObjectName(_fromUtf8("pushButtonAddSubscription"))
+        self.pushButtonAddSubscription = QtWidgets.QPushButton(self.subscriptions)
+        self.pushButtonAddSubscription.setObjectName("pushButtonAddSubscription")
         self.pushButtonAddSubscription.resize(200, self.pushButtonAddSubscription.height())
         self.verticalSplitter_3.addWidget(self.pushButtonAddSubscription)
         self.verticalSplitter_3.setStretchFactor(0, 1)
@@ -402,20 +370,20 @@ class Ui_MainWindow(object):
         self.verticalSplitter_3.handle(1).setEnabled(False)
         self.horizontalSplitter_4.addWidget(self.verticalSplitter_3)
         self.verticalSplitter_4 = settingsmixin.SSplitter()
-        self.verticalSplitter_4.setObjectName(_fromUtf8("verticalSplitter_4"))
+        self.verticalSplitter_4.setObjectName("verticalSplitter_4")
         self.verticalSplitter_4.setOrientation(QtCore.Qt.Vertical)
-        self.horizontalSplitter_2 = QtGui.QSplitter()
-        self.horizontalSplitter_2.setObjectName(_fromUtf8("horizontalSplitter_2"))
-        self.inboxSearchLineEditSubscriptions = QtGui.QLineEdit(self.subscriptions)
-        self.inboxSearchLineEditSubscriptions.setObjectName(_fromUtf8("inboxSearchLineEditSubscriptions"))
+        self.horizontalSplitter_2 = QtWidgets.QSplitter()
+        self.horizontalSplitter_2.setObjectName("horizontalSplitter_2")
+        self.inboxSearchLineEditSubscriptions = QtWidgets.QLineEdit(self.subscriptions)
+        self.inboxSearchLineEditSubscriptions.setObjectName("inboxSearchLineEditSubscriptions")
         self.horizontalSplitter_2.addWidget(self.inboxSearchLineEditSubscriptions)
-        self.inboxSearchOptionSubscriptions = QtGui.QComboBox(self.subscriptions)
-        self.inboxSearchOptionSubscriptions.setObjectName(_fromUtf8("inboxSearchOptionSubscriptions"))
-        self.inboxSearchOptionSubscriptions.addItem(_fromUtf8(""))
-        self.inboxSearchOptionSubscriptions.addItem(_fromUtf8(""))
-        self.inboxSearchOptionSubscriptions.addItem(_fromUtf8(""))
-        self.inboxSearchOptionSubscriptions.addItem(_fromUtf8(""))
-        self.inboxSearchOptionSubscriptions.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
+        self.inboxSearchOptionSubscriptions = QtWidgets.QComboBox(self.subscriptions)
+        self.inboxSearchOptionSubscriptions.setObjectName("inboxSearchOptionSubscriptions")
+        self.inboxSearchOptionSubscriptions.addItem("")
+        self.inboxSearchOptionSubscriptions.addItem("")
+        self.inboxSearchOptionSubscriptions.addItem("")
+        self.inboxSearchOptionSubscriptions.addItem("")
+        self.inboxSearchOptionSubscriptions.setSizeAdjustPolicy(QtWidgets.QComboBox.AdjustToContents)
         self.inboxSearchOptionSubscriptions.setCurrentIndex(2)
         self.horizontalSplitter_2.addWidget(self.inboxSearchOptionSubscriptions)
         self.horizontalSplitter_2.handle(1).setEnabled(False)
@@ -423,21 +391,21 @@ class Ui_MainWindow(object):
         self.horizontalSplitter_2.setStretchFactor(1, 0)
         self.verticalSplitter_4.addWidget(self.horizontalSplitter_2)
         self.tableWidgetInboxSubscriptions = settingsmixin.STableWidget(self.subscriptions)
-        self.tableWidgetInboxSubscriptions.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
+        self.tableWidgetInboxSubscriptions.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
         self.tableWidgetInboxSubscriptions.setAlternatingRowColors(True)
-        self.tableWidgetInboxSubscriptions.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
-        self.tableWidgetInboxSubscriptions.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
+        self.tableWidgetInboxSubscriptions.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
+        self.tableWidgetInboxSubscriptions.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
         self.tableWidgetInboxSubscriptions.setWordWrap(False)
-        self.tableWidgetInboxSubscriptions.setObjectName(_fromUtf8("tableWidgetInboxSubscriptions"))
+        self.tableWidgetInboxSubscriptions.setObjectName("tableWidgetInboxSubscriptions")
         self.tableWidgetInboxSubscriptions.setColumnCount(4)
         self.tableWidgetInboxSubscriptions.setRowCount(0)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxSubscriptions.setHorizontalHeaderItem(0, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxSubscriptions.setHorizontalHeaderItem(1, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxSubscriptions.setHorizontalHeaderItem(2, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxSubscriptions.setHorizontalHeaderItem(3, item)
         self.tableWidgetInboxSubscriptions.horizontalHeader().setCascadingSectionResizes(True)
         self.tableWidgetInboxSubscriptions.horizontalHeader().setDefaultSectionSize(200)
@@ -451,7 +419,7 @@ class Ui_MainWindow(object):
         self.textEditInboxMessageSubscriptions = MessageView(self.subscriptions)
         self.textEditInboxMessageSubscriptions.setBaseSize(QtCore.QSize(0, 500))
         self.textEditInboxMessageSubscriptions.setReadOnly(True)
-        self.textEditInboxMessageSubscriptions.setObjectName(_fromUtf8("textEditInboxMessageSubscriptions"))
+        self.textEditInboxMessageSubscriptions.setObjectName("textEditInboxMessageSubscriptions")
         self.verticalSplitter_4.addWidget(self.textEditInboxMessageSubscriptions)
         self.verticalSplitter_4.setStretchFactor(0, 0)
         self.verticalSplitter_4.setStretchFactor(1, 1)
@@ -467,35 +435,31 @@ class Ui_MainWindow(object):
         self.horizontalSplitter_4.setCollapsible(1, False)
         self.gridLayout_3.addWidget(self.horizontalSplitter_4, 0, 0, 1, 1)
         icon6 = QtGui.QIcon()
-        icon6.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/subscriptions.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off
-        )
-        self.tabWidget.addTab(self.subscriptions, icon6, _fromUtf8(""))
-        self.chans = QtGui.QWidget()
-        self.chans.setObjectName(_fromUtf8("chans"))
-        self.gridLayout_4 = QtGui.QGridLayout(self.chans)
-        self.gridLayout_4.setObjectName(_fromUtf8("gridLayout_4"))
+        icon6.addPixmap(QtGui.QPixmap(":/newPrefix/images/subscriptions.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.tabWidget.addTab(self.subscriptions, icon6, "")
+        self.chans = QtWidgets.QWidget()
+        self.chans.setObjectName("chans")
+        self.gridLayout_4 = QtWidgets.QGridLayout(self.chans)
+        self.gridLayout_4.setObjectName("gridLayout_4")
         self.horizontalSplitter_7 = settingsmixin.SSplitter()
-        self.horizontalSplitter_7.setObjectName(_fromUtf8("horizontalSplitter_7"))
+        self.horizontalSplitter_7.setObjectName("horizontalSplitter_7")
         self.verticalSplitter_17 = settingsmixin.SSplitter()
-        self.verticalSplitter_17.setObjectName(_fromUtf8("verticalSplitter_17"))
+        self.verticalSplitter_17.setObjectName("verticalSplitter_17")
         self.verticalSplitter_17.setOrientation(QtCore.Qt.Vertical)
         self.treeWidgetChans = settingsmixin.STreeWidget(self.chans)
-        self.treeWidgetChans.setFrameShadow(QtGui.QFrame.Sunken)
+        self.treeWidgetChans.setFrameShadow(QtWidgets.QFrame.Sunken)
         self.treeWidgetChans.setLineWidth(1)
         self.treeWidgetChans.setAlternatingRowColors(True)
-        self.treeWidgetChans.setSelectionMode(QtGui.QAbstractItemView.SingleSelection)
-        self.treeWidgetChans.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
-        self.treeWidgetChans.setObjectName(_fromUtf8("treeWidgetChans"))
+        self.treeWidgetChans.setSelectionMode(QtWidgets.QAbstractItemView.SingleSelection)
+        self.treeWidgetChans.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
+        self.treeWidgetChans.setObjectName("treeWidgetChans")
         self.treeWidgetChans.resize(200, self.treeWidgetChans.height())
         icon7 = QtGui.QIcon()
-        icon7.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/can-icon-16px.png")), QtGui.QIcon.Selected, QtGui.QIcon.Off
-        )
+        icon7.addPixmap(QtGui.QPixmap(":/newPrefix/images/can-icon-16px.png"), QtGui.QIcon.Selected, QtGui.QIcon.Off)
         self.treeWidgetChans.headerItem().setIcon(0, icon7)
         self.verticalSplitter_17.addWidget(self.treeWidgetChans)
-        self.pushButtonAddChan = QtGui.QPushButton(self.chans)
-        self.pushButtonAddChan.setObjectName(_fromUtf8("pushButtonAddChan"))
+        self.pushButtonAddChan = QtWidgets.QPushButton(self.chans)
+        self.pushButtonAddChan.setObjectName("pushButtonAddChan")
         self.pushButtonAddChan.resize(200, self.pushButtonAddChan.height())
         self.verticalSplitter_17.addWidget(self.pushButtonAddChan)
         self.verticalSplitter_17.setStretchFactor(0, 1)
@@ -505,21 +469,21 @@ class Ui_MainWindow(object):
         self.verticalSplitter_17.handle(1).setEnabled(False)
         self.horizontalSplitter_7.addWidget(self.verticalSplitter_17)
         self.verticalSplitter_8 = settingsmixin.SSplitter()
-        self.verticalSplitter_8.setObjectName(_fromUtf8("verticalSplitter_8"))
+        self.verticalSplitter_8.setObjectName("verticalSplitter_8")
         self.verticalSplitter_8.setOrientation(QtCore.Qt.Vertical)
-        self.horizontalSplitter_6 = QtGui.QSplitter()
-        self.horizontalSplitter_6.setObjectName(_fromUtf8("horizontalSplitter_6"))
-        self.inboxSearchLineEditChans = QtGui.QLineEdit(self.chans)
-        self.inboxSearchLineEditChans.setObjectName(_fromUtf8("inboxSearchLineEditChans"))
+        self.horizontalSplitter_6 = QtWidgets.QSplitter()
+        self.horizontalSplitter_6.setObjectName("horizontalSplitter_6")
+        self.inboxSearchLineEditChans = QtWidgets.QLineEdit(self.chans)
+        self.inboxSearchLineEditChans.setObjectName("inboxSearchLineEditChans")
         self.horizontalSplitter_6.addWidget(self.inboxSearchLineEditChans)
-        self.inboxSearchOptionChans = QtGui.QComboBox(self.chans)
-        self.inboxSearchOptionChans.setObjectName(_fromUtf8("inboxSearchOptionChans"))
-        self.inboxSearchOptionChans.addItem(_fromUtf8(""))
-        self.inboxSearchOptionChans.addItem(_fromUtf8(""))
-        self.inboxSearchOptionChans.addItem(_fromUtf8(""))
-        self.inboxSearchOptionChans.addItem(_fromUtf8(""))
-        self.inboxSearchOptionChans.addItem(_fromUtf8(""))
-        self.inboxSearchOptionChans.setSizeAdjustPolicy(QtGui.QComboBox.AdjustToContents)
+        self.inboxSearchOptionChans = QtWidgets.QComboBox(self.chans)
+        self.inboxSearchOptionChans.setObjectName("inboxSearchOptionChans")
+        self.inboxSearchOptionChans.addItem("")
+        self.inboxSearchOptionChans.addItem("")
+        self.inboxSearchOptionChans.addItem("")
+        self.inboxSearchOptionChans.addItem("")
+        self.inboxSearchOptionChans.addItem("")
+        self.inboxSearchOptionChans.setSizeAdjustPolicy(QtWidgets.QComboBox.AdjustToContents)
         self.inboxSearchOptionChans.setCurrentIndex(3)
         self.horizontalSplitter_6.addWidget(self.inboxSearchOptionChans)
         self.horizontalSplitter_6.handle(1).setEnabled(False)
@@ -527,21 +491,21 @@ class Ui_MainWindow(object):
         self.horizontalSplitter_6.setStretchFactor(1, 0)
         self.verticalSplitter_8.addWidget(self.horizontalSplitter_6)
         self.tableWidgetInboxChans = settingsmixin.STableWidget(self.chans)
-        self.tableWidgetInboxChans.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
+        self.tableWidgetInboxChans.setEditTriggers(QtWidgets.QAbstractItemView.NoEditTriggers)
         self.tableWidgetInboxChans.setAlternatingRowColors(True)
-        self.tableWidgetInboxChans.setSelectionMode(QtGui.QAbstractItemView.ExtendedSelection)
-        self.tableWidgetInboxChans.setSelectionBehavior(QtGui.QAbstractItemView.SelectRows)
+        self.tableWidgetInboxChans.setSelectionMode(QtWidgets.QAbstractItemView.ExtendedSelection)
+        self.tableWidgetInboxChans.setSelectionBehavior(QtWidgets.QAbstractItemView.SelectRows)
         self.tableWidgetInboxChans.setWordWrap(False)
-        self.tableWidgetInboxChans.setObjectName(_fromUtf8("tableWidgetInboxChans"))
+        self.tableWidgetInboxChans.setObjectName("tableWidgetInboxChans")
         self.tableWidgetInboxChans.setColumnCount(4)
         self.tableWidgetInboxChans.setRowCount(0)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxChans.setHorizontalHeaderItem(0, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxChans.setHorizontalHeaderItem(1, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxChans.setHorizontalHeaderItem(2, item)
-        item = QtGui.QTableWidgetItem()
+        item = QtWidgets.QTableWidgetItem()
         self.tableWidgetInboxChans.setHorizontalHeaderItem(3, item)
         self.tableWidgetInboxChans.horizontalHeader().setCascadingSectionResizes(True)
         self.tableWidgetInboxChans.horizontalHeader().setDefaultSectionSize(200)
@@ -555,7 +519,7 @@ class Ui_MainWindow(object):
         self.textEditInboxMessageChans = MessageView(self.chans)
         self.textEditInboxMessageChans.setBaseSize(QtCore.QSize(0, 500))
         self.textEditInboxMessageChans.setReadOnly(True)
-        self.textEditInboxMessageChans.setObjectName(_fromUtf8("textEditInboxMessageChans"))
+        self.textEditInboxMessageChans.setObjectName("textEditInboxMessageChans")
         self.verticalSplitter_8.addWidget(self.textEditInboxMessageChans)
         self.verticalSplitter_8.setStretchFactor(0, 0)
         self.verticalSplitter_8.setStretchFactor(1, 1)
@@ -571,10 +535,8 @@ class Ui_MainWindow(object):
         self.horizontalSplitter_7.setCollapsible(1, False)
         self.gridLayout_4.addWidget(self.horizontalSplitter_7, 0, 0, 1, 1)
         icon8 = QtGui.QIcon()
-        icon8.addPixmap(
-            QtGui.QPixmap(_fromUtf8(":/newPrefix/images/can-icon-16px.png")), QtGui.QIcon.Normal, QtGui.QIcon.Off
-        )
-        self.tabWidget.addTab(self.chans, icon8, _fromUtf8(""))
+        icon8.addPixmap(QtGui.QPixmap(":/newPrefix/images/can-icon-16px.png"), QtGui.QIcon.Normal, QtGui.QIcon.Off)
+        self.tabWidget.addTab(self.chans, icon8, "")
         self.blackwhitelist = Blacklist()
         self.tabWidget.addTab(self.blackwhitelist, QtGui.QIcon(":/newPrefix/images/blacklist.png"), "")
         # Initialize the Blacklist or Whitelist
@@ -586,62 +548,62 @@ class Ui_MainWindow(object):
         self.tabWidget.addTab(self.networkstatus, QtGui.QIcon(":/newPrefix/images/networkstatus.png"), "")
         self.gridLayout_10.addWidget(self.tabWidget, 0, 0, 1, 1)
         MainWindow.setCentralWidget(self.centralwidget)
-        self.menubar = QtGui.QMenuBar(MainWindow)
+        self.menubar = QtWidgets.QMenuBar(MainWindow)
         self.menubar.setGeometry(QtCore.QRect(0, 0, 885, 27))
-        self.menubar.setObjectName(_fromUtf8("menubar"))
-        self.menuFile = QtGui.QMenu(self.menubar)
-        self.menuFile.setObjectName(_fromUtf8("menuFile"))
-        self.menuSettings = QtGui.QMenu(self.menubar)
-        self.menuSettings.setObjectName(_fromUtf8("menuSettings"))
-        self.menuHelp = QtGui.QMenu(self.menubar)
-        self.menuHelp.setObjectName(_fromUtf8("menuHelp"))
+        self.menubar.setObjectName("menubar")
+        self.menuFile = QtWidgets.QMenu(self.menubar)
+        self.menuFile.setObjectName("menuFile")
+        self.menuSettings = QtWidgets.QMenu(self.menubar)
+        self.menuSettings.setObjectName("menuSettings")
+        self.menuHelp = QtWidgets.QMenu(self.menubar)
+        self.menuHelp.setObjectName("menuHelp")
         MainWindow.setMenuBar(self.menubar)
-        self.statusbar = QtGui.QStatusBar(MainWindow)
+        self.statusbar = QtWidgets.QStatusBar(MainWindow)
         self.statusbar.setMaximumSize(QtCore.QSize(16777215, 22))
-        self.statusbar.setObjectName(_fromUtf8("statusbar"))
+        self.statusbar.setObjectName("statusbar")
         MainWindow.setStatusBar(self.statusbar)
-        self.actionImport_keys = QtGui.QAction(MainWindow)
-        self.actionImport_keys.setObjectName(_fromUtf8("actionImport_keys"))
-        self.actionManageKeys = QtGui.QAction(MainWindow)
+        self.actionImport_keys = QtWidgets.QAction(MainWindow)
+        self.actionImport_keys.setObjectName("actionImport_keys")
+        self.actionManageKeys = QtWidgets.QAction(MainWindow)
         self.actionManageKeys.setCheckable(False)
         self.actionManageKeys.setEnabled(True)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("dialog-password"))
+        icon = QtGui.QIcon.fromTheme("dialog-password")
         self.actionManageKeys.setIcon(icon)
-        self.actionManageKeys.setObjectName(_fromUtf8("actionManageKeys"))
-        self.actionNetworkSwitch = QtGui.QAction(MainWindow)
-        self.actionNetworkSwitch.setObjectName(_fromUtf8("actionNetworkSwitch"))
-        self.actionExit = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("application-exit"))
+        self.actionManageKeys.setObjectName("actionManageKeys")
+        self.actionNetworkSwitch = QtWidgets.QAction(MainWindow)
+        self.actionNetworkSwitch.setObjectName("actionNetworkSwitch")
+        self.actionExit = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("application-exit")
         self.actionExit.setIcon(icon)
-        self.actionExit.setObjectName(_fromUtf8("actionExit"))
-        self.actionHelp = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("help-contents"))
+        self.actionExit.setObjectName("actionExit")
+        self.actionHelp = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("help-contents")
         self.actionHelp.setIcon(icon)
-        self.actionHelp.setObjectName(_fromUtf8("actionHelp"))
-        self.actionSupport = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("help-support"))
+        self.actionHelp.setObjectName("actionHelp")
+        self.actionSupport = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("help-support")
         self.actionSupport.setIcon(icon)
-        self.actionSupport.setObjectName(_fromUtf8("actionSupport"))
-        self.actionAbout = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("help-about"))
+        self.actionSupport.setObjectName("actionSupport")
+        self.actionAbout = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("help-about")
         self.actionAbout.setIcon(icon)
-        self.actionAbout.setObjectName(_fromUtf8("actionAbout"))
-        self.actionSettings = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("document-properties"))
+        self.actionAbout.setObjectName("actionAbout")
+        self.actionSettings = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("document-properties")
         self.actionSettings.setIcon(icon)
-        self.actionSettings.setObjectName(_fromUtf8("actionSettings"))
-        self.actionRegenerateDeterministicAddresses = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("view-refresh"))
+        self.actionSettings.setObjectName("actionSettings")
+        self.actionRegenerateDeterministicAddresses = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("view-refresh")
         self.actionRegenerateDeterministicAddresses.setIcon(icon)
-        self.actionRegenerateDeterministicAddresses.setObjectName(_fromUtf8("actionRegenerateDeterministicAddresses"))
-        self.actionDeleteAllTrashedMessages = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("user-trash"))
+        self.actionRegenerateDeterministicAddresses.setObjectName("actionRegenerateDeterministicAddresses")
+        self.actionDeleteAllTrashedMessages = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("user-trash")
         self.actionDeleteAllTrashedMessages.setIcon(icon)
-        self.actionDeleteAllTrashedMessages.setObjectName(_fromUtf8("actionDeleteAllTrashedMessages"))
-        self.actionJoinChan = QtGui.QAction(MainWindow)
-        icon = QtGui.QIcon.fromTheme(_fromUtf8("contact-new"))
+        self.actionDeleteAllTrashedMessages.setObjectName("actionDeleteAllTrashedMessages")
+        self.actionJoinChan = QtWidgets.QAction(MainWindow)
+        icon = QtGui.QIcon.fromTheme("contact-new")
         self.actionJoinChan.setIcon(icon)
-        self.actionJoinChan.setObjectName(_fromUtf8("actionJoinChan"))
+        self.actionJoinChan.setObjectName("actionJoinChan")
         self.menuFile.addAction(self.actionManageKeys)
         self.menuFile.addAction(self.actionDeleteAllTrashedMessages)
         self.menuFile.addAction(self.actionRegenerateDeterministicAddresses)
@@ -672,11 +634,11 @@ class Ui_MainWindow(object):
 
         # Popup menu actions container for the Sent page
         # pylint: disable=attribute-defined-outside-init
-        self.sentContextMenuToolbar = QtGui.QToolBar()
+        self.sentContextMenuToolbar = QtWidgets.QToolBar()
         # Popup menu actions container for chans tree
-        self.addressContextMenuToolbar = QtGui.QToolBar()
+        self.addressContextMenuToolbar = QtWidgets.QToolBar()
         # Popup menu actions container for subscriptions tree
-        self.subscriptionsContextMenuToolbar = QtGui.QToolBar()
+        self.subscriptionsContextMenuToolbar = QtWidgets.QToolBar()
 
     def updateNetworkSwitchMenuLabel(self, dontconnect=None):
         if dontconnect is None:
@@ -733,9 +695,7 @@ class Ui_MainWindow(object):
             hours = int(config.getint('bitmessagesettings', 'ttl') / 60 / 60)
         except:
             pass
-        self.labelHumanFriendlyTTLDescription.setText(
-            _translate("MainWindow", "%n hour(s)", None, QtCore.QCoreApplication.CodecForTr, hours)
-        )
+        self.labelHumanFriendlyTTLDescription.setText(_translate("MainWindow", "%n hour(s)", None, hours))
         self.pushButtonClear.setText(_translate("MainWindow", "Clear", None))
         self.pushButtonSend.setText(_translate("MainWindow", "Send", None))
         self.tabWidget.setTabText(self.tabWidget.indexOf(self.send), _translate("MainWindow", "Send", None))
@@ -810,7 +770,7 @@ class Ui_MainWindow(object):
 if __name__ == "__main__":
     import sys
 
-    app = QtGui.QApplication(sys.argv)
+    app = QtWidgets.QApplication(sys.argv)
     MainWindow = settingsmixin.SMainWindow()
     ui = Ui_MainWindow()
     ui.setupUi(MainWindow)

src/bitmessageqt/blacklist.py

@@ -1,42 +1,44 @@
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr, unic
+from dbcompat import dbstr
+from qtpy import QtCore, QtGui, QtWidgets
 
-import widgets
+from bitmessageqt import widgets
 from addresses import addBMIfNotPresent
 from bmconfigparser import config
-from dialogs import AddAddressDialog
+from .dialogs import AddAddressDialog
 from helper_sql import sqlExecute, sqlQuery
 from queues import UISignalQueue
-from retranslateui import RetranslateMixin
+from .retranslateui import RetranslateMixin
 from tr import _translate
-from uisignaler import UISignaler
-from utils import avatarize
+from .uisignaler import UISignaler
+from .utils import avatarize
 
 
-class Blacklist(QtGui.QWidget, RetranslateMixin):
+class Blacklist(QtWidgets.QWidget, RetranslateMixin):
     def __init__(self, parent=None):
         super(Blacklist, self).__init__(parent)
         widgets.load('blacklist.ui', self)
 
-        QtCore.QObject.connect(self.radioButtonBlacklist, QtCore.SIGNAL(
-            "clicked()"), self.click_radioButtonBlacklist)
-        QtCore.QObject.connect(self.radioButtonWhitelist, QtCore.SIGNAL(
-            "clicked()"), self.click_radioButtonWhitelist)
-        QtCore.QObject.connect(self.pushButtonAddBlacklist, QtCore.SIGNAL(
-        "clicked()"), self.click_pushButtonAddBlacklist)
+        self.radioButtonBlacklist.clicked.connect(
+            self.click_radioButtonBlacklist)
+        self.radioButtonWhitelist.clicked.connect(
+            self.click_radioButtonWhitelist)
+        self.pushButtonAddBlacklist.clicked.connect(
+            self.click_pushButtonAddBlacklist)
 
         self.init_blacklist_popup_menu()
 
-        # Initialize blacklist
-        QtCore.QObject.connect(self.tableWidgetBlacklist, QtCore.SIGNAL(
-            "itemChanged(QTableWidgetItem *)"), self.tableWidgetBlacklistItemChanged)
+        self.tableWidgetBlacklist.itemChanged.connect(
+            self.tableWidgetBlacklistItemChanged)
 
         # Set the icon sizes for the identicons
-        identicon_size = 3*7
-        self.tableWidgetBlacklist.setIconSize(QtCore.QSize(identicon_size, identicon_size))
+        identicon_size = 3 * 7
+        self.tableWidgetBlacklist.setIconSize(
+            QtCore.QSize(identicon_size, identicon_size))
 
         self.UISignalThread = UISignaler.get()
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "rerenderBlackWhiteList()"), self.rerenderBlackWhiteList)
+        self.UISignalThread.rerenderBlackWhiteList.connect(
+            self.rerenderBlackWhiteList)
 
     def click_radioButtonBlacklist(self):
         if config.get('bitmessagesettings', 'blackwhitelist') == 'white':
@@ -59,30 +61,30 @@ class Blacklist(QtGui.QWidget, RetranslateMixin):
         if self.NewBlacklistDialogInstance.exec_():
             if self.NewBlacklistDialogInstance.labelAddressCheck.text() == \
                     _translate("MainWindow", "Address is valid."):
-                address = addBMIfNotPresent(str(
+                address = addBMIfNotPresent(ustr(
                     self.NewBlacklistDialogInstance.lineEditAddress.text()))
                 # First we must check to see if the address is already in the
                 # address book. The user cannot add it again or else it will
                 # cause problems when updating and deleting the entry.
-                t = (address,)
+                t = (dbstr(address),)
                 if config.get('bitmessagesettings', 'blackwhitelist') == 'black':
                     sql = '''select * from blacklist where address=?'''
                 else:
                     sql = '''select * from whitelist where address=?'''
-                queryreturn = sqlQuery(sql,*t)
+                queryreturn = sqlQuery(sql, *t)
                 if queryreturn == []:
                     self.tableWidgetBlacklist.setSortingEnabled(False)
                     self.tableWidgetBlacklist.insertRow(0)
-                    newItem = QtGui.QTableWidgetItem(unicode(
-                        self.NewBlacklistDialogInstance.lineEditLabel.text().toUtf8(), 'utf-8'))
+                    newItem = QtGui.QTableWidgetItem(unic(ustr(
+                        self.NewBlacklistDialogInstance.lineEditLabel.text())))
                     newItem.setIcon(avatarize(address))
                     self.tableWidgetBlacklist.setItem(0, 0, newItem)
-                    newItem = QtGui.QTableWidgetItem(address)
+                    newItem = QtWidgets.QTableWidgetItem(address)
                     newItem.setFlags(
                         QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled)
                     self.tableWidgetBlacklist.setItem(0, 1, newItem)
                     self.tableWidgetBlacklist.setSortingEnabled(True)
-                    t = (str(self.NewBlacklistDialogInstance.lineEditLabel.text().toUtf8()), address, True)
+                    t = (dbstr(self.NewBlacklistDialogInstance.lineEditLabel.text()), dbstr(address), True)
                     if config.get('bitmessagesettings', 'blackwhitelist') == 'black':
                         sql = '''INSERT INTO blacklist VALUES (?,?,?)'''
                     else:
@@ -108,17 +110,17 @@ class Blacklist(QtGui.QWidget, RetranslateMixin):
     def tableWidgetBlacklistItemChanged(self, item):
         if item.column() == 0:
             addressitem = self.tableWidgetBlacklist.item(item.row(), 1)
-            if isinstance(addressitem, QtGui.QTableWidgetItem):
+            if isinstance(addressitem, QtWidgets.QTableWidgetItem):
                 if self.radioButtonBlacklist.isChecked():
                     sqlExecute('''UPDATE blacklist SET label=? WHERE address=?''',
-                            str(item.text()), str(addressitem.text()))
+                            dbstr(item.text()), dbstr(addressitem.text()))
                 else:
                     sqlExecute('''UPDATE whitelist SET label=? WHERE address=?''',
-                            str(item.text()), str(addressitem.text()))
+                            dbstr(item.text()), dbstr(addressitem.text()))
 
     def init_blacklist_popup_menu(self, connectSignal=True):
         # Popup menu for the Blacklist page
-        self.blacklistContextMenuToolbar = QtGui.QToolBar()
+        self.blacklistContextMenuToolbar = QtWidgets.QToolBar()
         # Actions
         self.actionBlacklistNew = self.blacklistContextMenuToolbar.addAction(
             _translate(
@@ -143,10 +145,9 @@ class Blacklist(QtGui.QWidget, RetranslateMixin):
         self.tableWidgetBlacklist.setContextMenuPolicy(
             QtCore.Qt.CustomContextMenu)
         if connectSignal:
-            self.connect(self.tableWidgetBlacklist, QtCore.SIGNAL(
-                'customContextMenuRequested(const QPoint&)'),
-                        self.on_context_menuBlacklist)
-        self.popMenuBlacklist = QtGui.QMenu(self)
+            self.tableWidgetBlacklist.customContextMenuRequested.connect(
+                self.on_context_menuBlacklist)
+        self.popMenuBlacklist = QtWidgets.QMenu(self)
         # self.popMenuBlacklist.addAction( self.actionBlacklistNew )
         self.popMenuBlacklist.addAction(self.actionBlacklistDelete)
         self.popMenuBlacklist.addSeparator()
@@ -171,17 +172,19 @@ class Blacklist(QtGui.QWidget, RetranslateMixin):
         self.tableWidgetBlacklist.setSortingEnabled(False)
         for row in queryreturn:
             label, address, enabled = row
+            label = label.decode("utf-8", "replace")
+            address = address.decode("utf-8", "replace")
             self.tableWidgetBlacklist.insertRow(0)
-            newItem = QtGui.QTableWidgetItem(unicode(label, 'utf-8'))
+            newItem = QtWidgets.QTableWidgetItem(unic(ustr(label)))
             if not enabled:
-                newItem.setTextColor(QtGui.QColor(128, 128, 128))
+                newItem.setForeground(QtGui.QColor(128, 128, 128))
             newItem.setIcon(avatarize(address))
             self.tableWidgetBlacklist.setItem(0, 0, newItem)
-            newItem = QtGui.QTableWidgetItem(address)
+            newItem = QtWidgets.QTableWidgetItem(address)
             newItem.setFlags(
                 QtCore.Qt.ItemIsSelectable | QtCore.Qt.ItemIsEnabled)
             if not enabled:
-                newItem.setTextColor(QtGui.QColor(128, 128, 128))
+                newItem.setForeground(QtGui.QColor(128, 128, 128))
             self.tableWidgetBlacklist.setItem(0, 1, newItem)
         self.tableWidgetBlacklist.setSortingEnabled(True)
 
@@ -191,26 +194,26 @@ class Blacklist(QtGui.QWidget, RetranslateMixin):
 
     def on_action_BlacklistDelete(self):
         currentRow = self.tableWidgetBlacklist.currentRow()
-        labelAtCurrentRow = self.tableWidgetBlacklist.item(
-            currentRow, 0).text().toUtf8()
+        labelAtCurrentRow = ustr(self.tableWidgetBlacklist.item(
+            currentRow, 0).text())
         addressAtCurrentRow = self.tableWidgetBlacklist.item(
             currentRow, 1).text()
         if config.get('bitmessagesettings', 'blackwhitelist') == 'black':
             sqlExecute(
                 '''DELETE FROM blacklist WHERE label=? AND address=?''',
-                str(labelAtCurrentRow), str(addressAtCurrentRow))
+                dbstr(labelAtCurrentRow), dbstr(addressAtCurrentRow))
         else:
             sqlExecute(
                 '''DELETE FROM whitelist WHERE label=? AND address=?''',
-                str(labelAtCurrentRow), str(addressAtCurrentRow))
+                dbstr(labelAtCurrentRow), dbstr(addressAtCurrentRow))
         self.tableWidgetBlacklist.removeRow(currentRow)
 
     def on_action_BlacklistClipboard(self):
         currentRow = self.tableWidgetBlacklist.currentRow()
         addressAtCurrentRow = self.tableWidgetBlacklist.item(
             currentRow, 1).text()
-        clipboard = QtGui.QApplication.clipboard()
-        clipboard.setText(str(addressAtCurrentRow))
+        clipboard = QtWidgets.QApplication.clipboard()
+        clipboard.setText(ustr(addressAtCurrentRow))
 
     def on_context_menuBlacklist(self, point):
         self.popMenuBlacklist.exec_(
@@ -220,33 +223,33 @@ class Blacklist(QtGui.QWidget, RetranslateMixin):
         currentRow = self.tableWidgetBlacklist.currentRow()
         addressAtCurrentRow = self.tableWidgetBlacklist.item(
             currentRow, 1).text()
-        self.tableWidgetBlacklist.item(
-            currentRow, 0).setTextColor(QtGui.QApplication.palette().text().color())
-        self.tableWidgetBlacklist.item(
-            currentRow, 1).setTextColor(QtGui.QApplication.palette().text().color())
+        self.tableWidgetBlacklist.item(currentRow, 0).setForeground(
+            QtWidgets.QApplication.palette().text().color())
+        self.tableWidgetBlacklist.item(currentRow, 1).setForeground(
+            QtWidgets.QApplication.palette().text().color())
         if config.get('bitmessagesettings', 'blackwhitelist') == 'black':
             sqlExecute(
                 '''UPDATE blacklist SET enabled=1 WHERE address=?''',
-                str(addressAtCurrentRow))
+                dbstr(addressAtCurrentRow))
         else:
             sqlExecute(
                 '''UPDATE whitelist SET enabled=1 WHERE address=?''',
-                str(addressAtCurrentRow))
+                dbstr(addressAtCurrentRow))
 
     def on_action_BlacklistDisable(self):
         currentRow = self.tableWidgetBlacklist.currentRow()
         addressAtCurrentRow = self.tableWidgetBlacklist.item(
             currentRow, 1).text()
-        self.tableWidgetBlacklist.item(
-            currentRow, 0).setTextColor(QtGui.QColor(128, 128, 128))
-        self.tableWidgetBlacklist.item(
-            currentRow, 1).setTextColor(QtGui.QColor(128, 128, 128))
+        self.tableWidgetBlacklist.item(currentRow, 0).setForeground(
+            QtGui.QColor(128, 128, 128))
+        self.tableWidgetBlacklist.item(currentRow, 1).setForeground(
+            QtGui.QColor(128, 128, 128))
         if config.get('bitmessagesettings', 'blackwhitelist') == 'black':
             sqlExecute(
-                '''UPDATE blacklist SET enabled=0 WHERE address=?''', str(addressAtCurrentRow))
+                '''UPDATE blacklist SET enabled=0 WHERE address=?''', dbstr(addressAtCurrentRow))
         else:
             sqlExecute(
-                '''UPDATE whitelist SET enabled=0 WHERE address=?''', str(addressAtCurrentRow))
+                '''UPDATE whitelist SET enabled=0 WHERE address=?''', dbstr(addressAtCurrentRow))
 
     def on_action_BlacklistSetAvatar(self):
         self.window().on_action_SetAvatar(self.tableWidgetBlacklist)

src/bitmessageqt/blacklist.ui

@@ -62,6 +62,9 @@
      <property name="sortingEnabled">
       <bool>true</bool>
      </property>
+     <property name="wordWrap">
+      <bool>false</bool>
+     </property>
      <attribute name="horizontalHeaderCascadingSectionResizes">
       <bool>true</bool>
      </attribute>
@@ -98,11 +101,8 @@
   <customwidget>
    <class>STableWidget</class>
    <extends>QTableWidget</extends>
-   <header>bitmessageqt/settingsmixin.h</header>
+   <header>bitmessageqt.settingsmixin</header>
   </customwidget>
  </customwidgets>
- <resources>
-  <include location="bitmessage_icons.qrc"/>
- </resources>
  <connections/>
 </ui>

src/bitmessageqt/dialogs.py

@@ -1,22 +1,23 @@
 """
-Custom dialog classes
+All dialogs are available in this module.
 """
 # pylint: disable=too-few-public-methods
-from PyQt4 import QtGui
+from unqstr import ustr
+
+from qtpy import QtWidgets
 
 import paths
-import widgets
-from address_dialogs import (
+from bitmessageqt import widgets
+from .address_dialogs import (
     AddAddressDialog, EmailGatewayDialog, NewAddressDialog,
     NewSubscriptionDialog, RegenerateAddressesDialog,
     SpecialAddressBehaviorDialog
 )
-from newchandialog import NewChanDialog
-from settings import SettingsDialog
+from .newchandialog import NewChanDialog
+from .settings import SettingsDialog
 from tr import _translate
 from version import softwareVersion
 
-
 __all__ = [
     "NewChanDialog", "AddAddressDialog", "NewAddressDialog",
     "NewSubscriptionDialog", "RegenerateAddressesDialog",
@@ -25,8 +26,8 @@ __all__ = [
 ]
 
 
-class AboutDialog(QtGui.QDialog):
-    """The `About` dialog"""
+class AboutDialog(QtWidgets.QDialog):
+    """The "About" dialog"""
     def __init__(self, parent=None):
         super(AboutDialog, self).__init__(parent)
         widgets.load('about.ui', self)
@@ -36,7 +37,7 @@ class AboutDialog(QtGui.QDialog):
         if commit:
             version += '-' + commit[:7]
         self.labelVersion.setText(
-            self.labelVersion.text().replace(
+            ustr(self.labelVersion.text()).replace(
                 ':version:', version
             ).replace(':branch:', commit or 'v%s' % version)
         )
@@ -44,17 +45,17 @@ class AboutDialog(QtGui.QDialog):
 
         try:
             self.label_2.setText(
-                self.label_2.text().replace(
-                    '2022', str(last_commit.get('time').year)
+                ustr(self.label_2.text()).replace(
+                    '2022', ustr(last_commit.get('time').year)
                 ))
         except AttributeError:
             pass
 
-        self.setFixedSize(QtGui.QWidget.sizeHint(self))
+        self.setFixedSize(QtWidgets.QWidget.sizeHint(self))
 
 
-class IconGlossaryDialog(QtGui.QDialog):
-    """The `Icon Glossary` dialog, explaining the status icon colors"""
+class IconGlossaryDialog(QtWidgets.QDialog):
+    """The "Icon Glossary" dialog, explaining the status icon colors"""
     def __init__(self, parent=None, config=None):
         super(IconGlossaryDialog, self).__init__(parent)
         widgets.load('iconglossary.ui', self)
@@ -64,22 +65,23 @@ class IconGlossaryDialog(QtGui.QDialog):
 
         self.labelPortNumber.setText(_translate(
             "iconGlossaryDialog",
-            "You are using TCP port %1. (This can be changed in the settings)."
-        ).arg(config.getint('bitmessagesettings', 'port')))
-        self.setFixedSize(QtGui.QWidget.sizeHint(self))
+            "You are using TCP port {0}."
+            " (This can be changed in the settings)."
+        ).format(config.getint('bitmessagesettings', 'port')))
+        self.setFixedSize(QtWidgets.QWidget.sizeHint(self))
 
 
-class HelpDialog(QtGui.QDialog):
-    """The `Help` dialog"""
+class HelpDialog(QtWidgets.QDialog):
+    """The "Help" dialog"""
     def __init__(self, parent=None):
         super(HelpDialog, self).__init__(parent)
         widgets.load('help.ui', self)
-        self.setFixedSize(QtGui.QWidget.sizeHint(self))
+        self.setFixedSize(QtWidgets.QWidget.sizeHint(self))
 
 
-class ConnectDialog(QtGui.QDialog):
-    """The `Connect` dialog"""
+class ConnectDialog(QtWidgets.QDialog):
+    """The "Connect" dialog"""
     def __init__(self, parent=None):
         super(ConnectDialog, self).__init__(parent)
         widgets.load('connect.ui', self)
-        self.setFixedSize(QtGui.QWidget.sizeHint(self))
+        self.setFixedSize(QtWidgets.QWidget.sizeHint(self))

src/bitmessageqt/foldertree.py

@@ -1,18 +1,23 @@
 """
 Folder tree and messagelist widgets definitions.
 """
-# pylint: disable=too-many-arguments,bad-super-call
+# pylint: disable=too-many-arguments
 # pylint: disable=attribute-defined-outside-init
 
-from cgi import escape
+try:
+    from cgi import escape
+except ImportError:
+    from html import escape
 
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr, unic
+from dbcompat import dbstr
+from qtpy import QtCore, QtGui, QtWidgets
 
 from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
-from settingsmixin import SettingsMixin
+from .settingsmixin import SettingsMixin
 from tr import _translate
-from utils import avatarize
+from .utils import avatarize
 
 # for pylupdate
 _translate("MainWindow", "inbox")
@@ -38,15 +43,16 @@ class AccountMixin(object):
             return QtGui.QColor(128, 128, 128)
         elif self.type == self.CHAN:
             return QtGui.QColor(216, 119, 0)
-        elif self.type in [self.MAILINGLIST, self.SUBSCRIPTION]:
+        elif self.type in (self.MAILINGLIST, self.SUBSCRIPTION):
             return QtGui.QColor(137, 4, 177)
-        return QtGui.QApplication.palette().text().color()
+
+        return QtWidgets.QApplication.palette().text().color()
 
     def folderColor(self):
         """QT UI color for a folder"""
         if not self.parent().isEnabled:
             return QtGui.QColor(128, 128, 128)
-        return QtGui.QApplication.palette().text().color()
+        return QtWidgets.QApplication.palette().text().color()
 
     def accountBrush(self):
         """Account brush (for QT UI)"""
@@ -62,7 +68,7 @@ class AccountMixin(object):
 
     def accountString(self):
         """Account string suitable for use in To: field: label <address>"""
-        label = self._getLabel()
+        label = ustr(self._getLabel())
         return (
             self.address if label == self.address
             else '%s <%s>' % (label, self.address)
@@ -73,7 +79,7 @@ class AccountMixin(object):
         if address is None:
             self.address = None
         else:
-            self.address = str(address)
+            self.address = ustr(address)
 
     def setUnreadCount(self, cnt):
         """Set number of unread messages"""
@@ -83,7 +89,7 @@ class AccountMixin(object):
         except AttributeError:
             pass
         self.unreadCount = int(cnt)
-        if isinstance(self, QtGui.QTreeWidgetItem):
+        if isinstance(self, QtWidgets.QTreeWidgetItem):
             self.emitDataChanged()
 
     def setEnabled(self, enabled):
@@ -97,7 +103,7 @@ class AccountMixin(object):
             for i in range(self.childCount()):
                 if isinstance(self.child(i), Ui_FolderWidget):
                     self.child(i).setEnabled(enabled)
-        if isinstance(self, QtGui.QTreeWidgetItem):
+        if isinstance(self, QtWidgets.QTreeWidgetItem):
             self.emitDataChanged()
 
     def setType(self):
@@ -111,53 +117,53 @@ class AccountMixin(object):
         elif config.safeGetBoolean(self.address, 'mailinglist'):
             self.type = self.MAILINGLIST
         elif sqlQuery(
-                '''select label from subscriptions where address=?''', self.address):
+            'SELECT label FROM subscriptions WHERE address=?',
+            dbstr(self.address)
+        ):
             self.type = AccountMixin.SUBSCRIPTION
         else:
             self.type = self.NORMAL
 
     def defaultLabel(self):
         """Default label (in case no label is set manually)"""
-        queryreturn = None
-        retval = None
+        queryreturn = retval = None
         if self.type in (
                 AccountMixin.NORMAL,
                 AccountMixin.CHAN, AccountMixin.MAILINGLIST):
             try:
-                retval = unicode(
-                    config.get(self.address, 'label'), 'utf-8')
+                retval = unic(ustr(config.get(self.address, 'label')))
             except Exception:
                 queryreturn = sqlQuery(
-                    '''select label from addressbook where address=?''', self.address)
+                    'SELECT label FROM addressbook WHERE address=?',
+                    dbstr(self.address)
+                )
         elif self.type == AccountMixin.SUBSCRIPTION:
             queryreturn = sqlQuery(
-                '''select label from subscriptions where address=?''', self.address)
-        if queryreturn is not None:
-            if queryreturn != []:
-                for row in queryreturn:
-                    retval, = row
-                    retval = unicode(retval, 'utf-8')
+                'SELECT label FROM subscriptions WHERE address=?',
+                dbstr(self.address)
+            )
+        if queryreturn:
+            retval = unic(ustr(queryreturn[-1][0]))
         elif self.address is None or self.type == AccountMixin.ALL:
-            return unicode(
-                str(_translate("MainWindow", "All accounts")), 'utf-8')
+            return unic(_translate("MainWindow", "All accounts"))
 
-        return retval or unicode(self.address, 'utf-8')
+        return retval or unic(self.address)
 
 
-class BMTreeWidgetItem(QtGui.QTreeWidgetItem, AccountMixin):
+class BMTreeWidgetItem(QtWidgets.QTreeWidgetItem, AccountMixin):
     """A common abstract class for Tree widget item"""
 
     def __init__(self, parent, pos, address, unreadCount):
-        super(QtGui.QTreeWidgetItem, self).__init__()
+        super(QtWidgets.QTreeWidgetItem, self).__init__()
         self.setAddress(address)
         self.setUnreadCount(unreadCount)
         self._setup(parent, pos)
 
     def _getAddressBracket(self, unreadCount=False):
-        return " (" + str(self.unreadCount) + ")" if unreadCount else ""
+        return " (" + ustr(self.unreadCount) + ")" if unreadCount else ""
 
     def data(self, column, role):
-        """Override internal QT method for returning object data"""
+        """Override internal Qt method for returning object data"""
         if column == 0:
             if role == QtCore.Qt.DisplayRole:
                 return self._getLabel() + self._getAddressBracket(
@@ -190,11 +196,11 @@ class Ui_FolderWidget(BMTreeWidgetItem):
         return _translate("MainWindow", self.folderName)
 
     def setFolderName(self, fname):
-        """Set folder name (for QT UI)"""
-        self.folderName = str(fname)
+        """Set folder name (for Qt UI)"""
+        self.folderName = ustr(fname)
 
     def data(self, column, role):
-        """Override internal QT method for returning object data"""
+        """Override internal Qt method for returning object data"""
         if column == 0 and role == QtCore.Qt.ForegroundRole:
             return self.folderBrush()
         return super(Ui_FolderWidget, self).data(column, role)
@@ -216,12 +222,14 @@ class Ui_FolderWidget(BMTreeWidgetItem):
                 return self.folderName < other.folderName
             return x >= y if reverse else x < y
 
-        return super(QtGui.QTreeWidgetItem, self).__lt__(other)
+        return super(QtWidgets.QTreeWidgetItem, self).__lt__(other)
 
 
 class Ui_AddressWidget(BMTreeWidgetItem, SettingsMixin):
     """Item in the account/folder tree representing an account"""
-    def __init__(self, parent, pos=0, address=None, unreadCount=0, enabled=True):
+    def __init__(
+        self, parent, pos=0, address=None, unreadCount=0, enabled=True
+    ):
         super(Ui_AddressWidget, self).__init__(
             parent, pos, address, unreadCount)
         self.setEnabled(enabled)
@@ -232,15 +240,13 @@ class Ui_AddressWidget(BMTreeWidgetItem, SettingsMixin):
 
     def _getLabel(self):
         if self.address is None:
-            return unicode(_translate(
-                "MainWindow", "All accounts").toUtf8(), 'utf-8', 'ignore')
+            return unic(_translate("MainWindow", "All accounts"))
         else:
             try:
-                return unicode(
-                    config.get(self.address, 'label'),
-                    'utf-8', 'ignore')
+                return unic(ustr(
+                    config.get(self.address, 'label')))
             except:
-                return unicode(self.address, 'utf-8')
+                return unic(self.address)
 
     def _getAddressBracket(self, unreadCount=False):
         ret = "" if self.isExpanded() \
@@ -260,15 +266,13 @@ class Ui_AddressWidget(BMTreeWidgetItem, SettingsMixin):
         return super(Ui_AddressWidget, self).data(column, role)
 
     def setData(self, column, role, value):
-        """Save account label (if you edit in the the UI, this will be triggered and will save it to keys.dat)"""
+        """
+        Save account label (if you edit in the the UI, this will be
+        triggered and will save it to keys.dat)
+        """
         if role == QtCore.Qt.EditRole \
                 and self.type != AccountMixin.SUBSCRIPTION:
-            config.set(
-                str(self.address), 'label',
-                str(value.toString().toUtf8())
-                if isinstance(value, QtCore.QVariant)
-                else value.encode('utf-8')
-            )
+            config.set(self.address, 'label', ustr(value))
             config.save()
         return super(Ui_AddressWidget, self).setData(column, role, value)
 
@@ -295,24 +299,26 @@ class Ui_AddressWidget(BMTreeWidgetItem, SettingsMixin):
                 if self._getSortRank() < other._getSortRank() else reverse
             )
 
-        return super(QtGui.QTreeWidgetItem, self).__lt__(other)
+        return super(Ui_AddressWidget, self).__lt__(other)
 
 
 class Ui_SubscriptionWidget(Ui_AddressWidget):
     """Special treating of subscription addresses"""
     # pylint: disable=unused-argument
-    def __init__(self, parent, pos=0, address="", unreadCount=0, label="", enabled=True):
+    def __init__(
+        self, parent, pos=0, address="", unreadCount=0, label="",
+        enabled=True
+    ):
         super(Ui_SubscriptionWidget, self).__init__(
             parent, pos, address, unreadCount, enabled)
 
     def _getLabel(self):
         queryreturn = sqlQuery(
-            '''select label from subscriptions where address=?''', self.address)
-        if queryreturn != []:
-            for row in queryreturn:
-                retval, = row
-            return unicode(retval, 'utf-8', 'ignore')
-        return unicode(self.address, 'utf-8')
+            'SELECT label FROM subscriptions WHERE address=?',
+            dbstr(self.address))
+        if queryreturn:
+            return unic(ustr(queryreturn[-1][0]))
+        return unic(self.address)
 
     def setType(self):
         """Set account type"""
@@ -322,22 +328,17 @@ class Ui_SubscriptionWidget(Ui_AddressWidget):
     def setData(self, column, role, value):
         """Save subscription label to database"""
         if role == QtCore.Qt.EditRole:
-            if isinstance(value, QtCore.QVariant):
-                label = str(
-                    value.toString().toUtf8()).decode('utf-8', 'ignore')
-            else:
-                label = unicode(value, 'utf-8', 'ignore')
             sqlExecute(
-                '''UPDATE subscriptions SET label=? WHERE address=?''',
-                label, self.address)
+                'UPDATE subscriptions SET label=? WHERE address=?',
+                dbstr(unic(ustr(value))), dbstr(self.address))
         return super(Ui_SubscriptionWidget, self).setData(column, role, value)
 
 
-class BMTableWidgetItem(QtGui.QTableWidgetItem, SettingsMixin):
+class BMTableWidgetItem(QtWidgets.QTableWidgetItem, SettingsMixin):
     """A common abstract class for Table widget item"""
 
     def __init__(self, label=None, unread=False):
-        super(QtGui.QTableWidgetItem, self).__init__()
+        super(QtWidgets.QTableWidgetItem, self).__init__()
         self.setLabel(label)
         self.setUnread(unread)
         self._setup()
@@ -407,18 +408,17 @@ class MessageList_AddressWidget(BMAddressWidget):
                 AccountMixin.NORMAL,
                 AccountMixin.CHAN, AccountMixin.MAILINGLIST):
             try:
-                newLabel = unicode(
-                    config.get(self.address, 'label'),
-                    'utf-8', 'ignore')
+                newLabel = unic(ustr(config.get(self.address, 'label')))
             except:
                 queryreturn = sqlQuery(
-                    '''select label from addressbook where address=?''', self.address)
+                    'SELECT label FROM addressbook WHERE address=?',
+                    dbstr(self.address))
         elif self.type == AccountMixin.SUBSCRIPTION:
             queryreturn = sqlQuery(
-                '''select label from subscriptions where address=?''', self.address)
+                'SELECT label FROM subscriptions WHERE address=?',
+                dbstr(self.address))
         if queryreturn:
-            for row in queryreturn:
-                newLabel = unicode(row[0], 'utf-8', 'ignore')
+            newLabel = unic(ustr(queryreturn[-1][0]))
 
         self.label = newLabel
 
@@ -438,7 +438,7 @@ class MessageList_AddressWidget(BMAddressWidget):
     def __lt__(self, other):
         if isinstance(other, MessageList_AddressWidget):
             return self.label.lower() < other.label.lower()
-        return super(QtGui.QTableWidgetItem, self).__lt__(other)
+        return super(MessageList_AddressWidget, self).__lt__(other)
 
 
 class MessageList_SubjectWidget(BMTableWidgetItem):
@@ -454,16 +454,16 @@ class MessageList_SubjectWidget(BMTableWidgetItem):
     def data(self, role):
         """Return object data (QT UI)"""
         if role == QtCore.Qt.UserRole:
-            return self.subject
+            return ustr(self.subject)
         if role == QtCore.Qt.ToolTipRole:
-            return escape(unicode(self.subject, 'utf-8'))
+            return escape(unic(ustr(self.subject)))
         return super(MessageList_SubjectWidget, self).data(role)
 
     # label (or address) alphabetically, disabled at the end
     def __lt__(self, other):
         if isinstance(other, MessageList_SubjectWidget):
             return self.label.lower() < other.label.lower()
-        return super(QtGui.QTableWidgetItem, self).__lt__(other)
+        return super(MessageList_SubjectWidget, self).__lt__(other)
 
 
 # In order for the time columns on the Inbox and Sent tabs to be sorted
@@ -476,9 +476,9 @@ class MessageList_TimeWidget(BMTableWidgetItem):
     msgid is available by QtCore.Qt.UserRole
     """
 
-    def __init__(self, label=None, unread=False, timestamp=None, msgid=''):
+    def __init__(self, label=None, unread=False, timestamp=None, msgid=b''):
         super(MessageList_TimeWidget, self).__init__(label, unread)
-        self.setData(QtCore.Qt.UserRole, QtCore.QByteArray(msgid))
+        self.setData(QtCore.Qt.UserRole, QtCore.QByteArray(bytes(msgid)))
         self.setData(TimestampRole, int(timestamp))
 
     def __lt__(self, other):
@@ -491,15 +491,14 @@ class MessageList_TimeWidget(BMTableWidgetItem):
         """
         data = super(MessageList_TimeWidget, self).data(role)
         if role == TimestampRole:
-            return int(data.toPyObject())
+            return int(data)
         if role == QtCore.Qt.UserRole:
-            return str(data.toPyObject())
+            return ustr(data)
         return data
 
 
 class Ui_AddressBookWidgetItem(BMAddressWidget):
     """Addressbook item"""
-    # pylint: disable=unused-argument
     def __init__(self, label=None, acc_type=AccountMixin.NORMAL):
         self.type = acc_type
         super(Ui_AddressBookWidgetItem, self).__init__(label=label)
@@ -513,10 +512,7 @@ class Ui_AddressBookWidgetItem(BMAddressWidget):
     def setData(self, role, value):
         """Set data"""
         if role == QtCore.Qt.EditRole:
-            self.label = str(
-                value.toString().toUtf8()
-                if isinstance(value, QtCore.QVariant) else value
-            )
+            self.label = ustr(value)
             if self.type in (
                     AccountMixin.NORMAL,
                     AccountMixin.MAILINGLIST, AccountMixin.CHAN):
@@ -525,28 +521,33 @@ class Ui_AddressBookWidgetItem(BMAddressWidget):
                     config.set(self.address, 'label', self.label)
                     config.save()
                 except:
-                    sqlExecute('''UPDATE addressbook set label=? WHERE address=?''', self.label, self.address)
+                    sqlExecute(
+                        'UPDATE addressbook SET label=? WHERE address=?',
+                        dbstr(self.label), dbstr(self.address)
+                    )
             elif self.type == AccountMixin.SUBSCRIPTION:
-                sqlExecute('''UPDATE subscriptions set label=? WHERE address=?''', self.label, self.address)
-            else:
-                pass
+                sqlExecute(
+                    'UPDATE subscriptions SET label=? WHERE address=?',
+                    dbstr(self.label), dbstr(self.address))
         return super(Ui_AddressBookWidgetItem, self).setData(role, value)
 
     def __lt__(self, other):
-        if isinstance(other, Ui_AddressBookWidgetItem):
-            reverse = QtCore.Qt.DescendingOrder == \
-                self.tableWidget().horizontalHeader().sortIndicatorOrder()
+        if not isinstance(other, Ui_AddressBookWidgetItem):
+            return super(Ui_AddressBookWidgetItem, self).__lt__(other)
 
-            if self.type == other.type:
-                return self.label.lower() < other.label.lower()
-            return not reverse if self.type < other.type else reverse
-        return super(QtGui.QTableWidgetItem, self).__lt__(other)
+        reverse = QtCore.Qt.DescendingOrder == \
+            self.tableWidget().horizontalHeader().sortIndicatorOrder()
+
+        if self.type == other.type:
+            return self.label.lower() < other.label.lower()
+
+        return not reverse if self.type < other.type else reverse
 
 
 class Ui_AddressBookWidgetItemLabel(Ui_AddressBookWidgetItem):
     """Addressbook label item"""
     def __init__(self, address, label, acc_type):
-        self.address = address
+        self.address = ustr(address)
         super(Ui_AddressBookWidgetItemLabel, self).__init__(label, acc_type)
 
     def data(self, role):
@@ -558,7 +559,7 @@ class Ui_AddressBookWidgetItemLabel(Ui_AddressBookWidgetItem):
 class Ui_AddressBookWidgetItemAddress(Ui_AddressBookWidgetItem):
     """Addressbook address item"""
     def __init__(self, address, label, acc_type):
-        self.address = address
+        self.address = ustr(address)
         super(Ui_AddressBookWidgetItemAddress, self).__init__(address, acc_type)
 
     def data(self, role):
@@ -570,28 +571,27 @@ class Ui_AddressBookWidgetItemAddress(Ui_AddressBookWidgetItem):
         return super(Ui_AddressBookWidgetItemAddress, self).data(role)
 
 
-class AddressBookCompleter(QtGui.QCompleter):
+class AddressBookCompleter(QtWidgets.QCompleter):
     """Addressbook completer"""
-
     def __init__(self):
         super(AddressBookCompleter, self).__init__()
         self.cursorPos = -1
 
-    def onCursorPositionChanged(self, oldPos, newPos):  # pylint: disable=unused-argument
+    def onCursorPositionChanged(self, oldPos, newPos):
         """Callback for cursor position change"""
+        # pylint: disable=unused-argument
         if oldPos != self.cursorPos:
             self.cursorPos = -1
 
     def splitPath(self, path):
         """Split on semicolon"""
-        text = unicode(path.toUtf8(), 'utf-8')
+        text = unic(ustr(path))
         return [text[:self.widget().cursorPosition()].split(';')[-1].strip()]
 
     def pathFromIndex(self, index):
         """Perform autocompletion (reimplemented QCompleter method)"""
-        autoString = unicode(
-            index.data(QtCore.Qt.EditRole).toString().toUtf8(), 'utf-8')
-        text = unicode(self.widget().text().toUtf8(), 'utf-8')
+        autoString = unic(ustr(index.data(QtCore.Qt.EditRole).toString()))
+        text = unic(ustr(self.widget().text()))
 
         # If cursor position was saved, restore it, else save it
         if self.cursorPos != -1:
@@ -620,7 +620,6 @@ class AddressBookCompleter(QtGui.QCompleter):
 
         # Get string value from before auto finished string is selected
         # pre = text[prevDelimiterIndex + 1:curIndex - 1]
-
         # Get part of string that occurs AFTER cursor
         part2 = text[nextDelimiterIndex:]
 

src/bitmessageqt/languagebox.py

@@ -1,48 +1,56 @@
-"""Language Box Module for Locale Settings"""
-# pylint: disable=too-few-public-methods,bad-continuation
+"""LanguageBox widget is for selecting UI language"""
+
 import glob
 import os
 
-from PyQt4 import QtCore, QtGui
+from qtpy import QtCore, QtWidgets
 
 import paths
 from bmconfigparser import config
+from tr import _translate
 
 
-class LanguageBox(QtGui.QComboBox):
-    """LanguageBox class for Qt UI"""
+# pylint: disable=too-few-public-methods
+class LanguageBox(QtWidgets.QComboBox):
+    """A subclass of `QtWidgets.QComboBox` for selecting language"""
     languageName = {
-        "system": "System Settings", "eo": "Esperanto",
+        "system": "System Settings",
+        "eo": "Esperanto",
         "en_pirate": "Pirate English"
     }
 
     def __init__(self, parent=None):
-        super(QtGui.QComboBox, self).__init__(parent)
+        super(LanguageBox, self).__init__(parent)
         self.populate()
 
     def populate(self):
         """Populates drop down list with all available languages."""
         self.clear()
         localesPath = os.path.join(paths.codePath(), 'translations')
-        self.addItem(QtGui.QApplication.translate(
-            "settingsDialog", "System Settings", "system"), "system")
+        self.addItem(
+            _translate("settingsDialog", "System Settings", "system"),
+            "system"
+        )
         self.setCurrentIndex(0)
-        self.setInsertPolicy(QtGui.QComboBox.InsertAlphabetically)
+        self.setInsertPolicy(QtWidgets.QComboBox.InsertAlphabetically)
         for translationFile in sorted(
             glob.glob(os.path.join(localesPath, "bitmessage_*.qm"))
         ):
             localeShort = \
                 os.path.split(translationFile)[1].split("_", 1)[1][:-3]
+            locale = QtCore.QLocale(localeShort)
             if localeShort in LanguageBox.languageName:
                 self.addItem(
                     LanguageBox.languageName[localeShort], localeShort)
+            elif locale.nativeLanguageName() == "":
+                self.addItem(localeShort, localeShort)
             else:
                 locale = QtCore.QLocale(localeShort)
                 self.addItem(
                     locale.nativeLanguageName() or localeShort, localeShort)
 
         configuredLocale = config.safeGet(
-            'bitmessagesettings', 'userlocale', "system")
+            'bitmessagesettings', 'userlocale', 'system')
         for i in range(self.count()):
             if self.itemData(i) == configuredLocale:
                 self.setCurrentIndex(i)

src/bitmessageqt/messagecompose.py

@@ -1,33 +1,34 @@
-"""
-Message editor with a wheel zoom functionality
-"""
-# pylint: disable=bad-continuation
+"""The MessageCompose class definition"""
 
-from PyQt4 import QtCore, QtGui
+from qtpy import QtCore, QtWidgets
+from tr import _translate
 
 
-class MessageCompose(QtGui.QTextEdit):
+class MessageCompose(QtWidgets.QTextEdit):
     """Editor class with wheel zoom functionality"""
-    def __init__(self, parent=0):
+    def __init__(self, parent=None):
         super(MessageCompose, self).__init__(parent)
+        # we'll deal with this later when we have a new message format
         self.setAcceptRichText(False)
         self.defaultFontPointSize = self.currentFont().pointSize()
 
     def wheelEvent(self, event):
         """Mouse wheel scroll event handler"""
         if (
-            QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ControlModifier
-        ) == QtCore.Qt.ControlModifier and event.orientation() == QtCore.Qt.Vertical:
+            (QtWidgets.QApplication.queryKeyboardModifiers()
+             & QtCore.Qt.ControlModifier) == QtCore.Qt.ControlModifier
+            and event.angleDelta().y() != 0
+        ):
             if event.delta() > 0:
                 self.zoomIn(1)
             else:
                 self.zoomOut(1)
-            zoom = self.currentFont().pointSize() * 100 / self.defaultFontPointSize
-            QtGui.QApplication.activeWindow().statusBar().showMessage(
-                QtGui.QApplication.translate("MainWindow", "Zoom level %1%").arg(
-                    str(zoom)
-                )
-            )
+            QtWidgets.QApplication.activeWindow().statusbar.showMessage(
+                _translate("MainWindow", "Zoom level {0}%").format(
+                    # zoom percentage
+                    self.currentFont().pointSize() * 100
+                    / self.defaultFontPointSize
+                ))
         else:
             # in QTextEdit, super does not zoom, only scroll
             super(MessageCompose, self).wheelEvent(event)

src/bitmessageqt/messageview.py

@@ -1,22 +1,22 @@
 """
 Custom message viewer with support for switching between HTML and plain
 text rendering, HTML sanitization, lazy rendering (as you scroll down),
-zoom and URL click warning popup
-
+zoom and URL click warning popup.
 """
 
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr, unic
+from qtpy import QtCore, QtGui, QtWidgets
 
-from safehtmlparser import SafeHTMLParser
+from .safehtmlparser import SafeHTMLParser
 from tr import _translate
 
 
-class MessageView(QtGui.QTextBrowser):
+class MessageView(QtWidgets.QTextBrowser):
     """Message content viewer class, can switch between plaintext and HTML"""
     MODE_PLAIN = 0
     MODE_HTML = 1
 
-    def __init__(self, parent=0):
+    def __init__(self, parent=None):
         super(MessageView, self).__init__(parent)
         self.mode = MessageView.MODE_PLAIN
         self.html = None
@@ -38,8 +38,11 @@ class MessageView(QtGui.QTextBrowser):
 
     def mousePressEvent(self, event):
         """Mouse press button event handler"""
-        if event.button() == QtCore.Qt.LeftButton and self.html and self.html.has_html and self.cursorForPosition(
-                event.pos()).block().blockNumber() == 0:
+        if (
+            event.button() == QtCore.Qt.LeftButton
+            and self.html and self.html.has_html
+            and self.cursorForPosition(event.pos()).block().blockNumber() == 0
+        ):
             if self.mode == MessageView.MODE_PLAIN:
                 self.showHTML()
             else:
@@ -52,23 +55,23 @@ class MessageView(QtGui.QTextBrowser):
         # super will actually automatically take care of zooming
         super(MessageView, self).wheelEvent(event)
         if (
-            QtGui.QApplication.queryKeyboardModifiers() & QtCore.Qt.ControlModifier
-        ) == QtCore.Qt.ControlModifier and event.orientation() == QtCore.Qt.Vertical:
+            (QtWidgets.QApplication.queryKeyboardModifiers()
+             & QtCore.Qt.ControlModifier) == QtCore.Qt.ControlModifier
+            and event.angleDelta().y() != 0
+        ):
             zoom = self.currentFont().pointSize() * 100 / self.defaultFontPointSize
-            QtGui.QApplication.activeWindow().statusBar().showMessage(_translate(
-                "MainWindow", "Zoom level %1%").arg(str(zoom)))
+            QtWidgets.QApplication.activeWindow().statusbar.showMessage(
+                _translate("MainWindow", "Zoom level {0}%").format(zoom))
 
     def setWrappingWidth(self, width=None):
         """Set word-wrapping width"""
-        self.setLineWrapMode(QtGui.QTextEdit.FixedPixelWidth)
-        if width is None:
-            width = self.width()
-        self.setLineWrapColumnOrWidth(width)
+        self.setLineWrapMode(QtWidgets.QTextEdit.FixedPixelWidth)
+        self.setLineWrapColumnOrWidth(width or self.width())
 
     def confirmURL(self, link):
         """Show a dialog requesting URL opening confirmation"""
         if link.scheme() == "mailto":
-            window = QtGui.QApplication.activeWindow()
+            window = QtWidgets.QApplication.activeWindow()
             window.ui.lineEditTo.setText(link.path())
             if link.hasQueryItem("subject"):
                 window.ui.lineEditSubject.setText(
@@ -83,39 +86,40 @@ class MessageView(QtGui.QTextBrowser):
             )
             window.ui.textEditMessage.setFocus()
             return
-        reply = QtGui.QMessageBox.warning(
-            self,
-            QtGui.QApplication.translate(
+        reply = QtWidgets.QMessageBox.warning(
+            self, _translate("MessageView", "Follow external link"),
+            _translate(
                 "MessageView",
-                "Follow external link"),
-            QtGui.QApplication.translate(
-                "MessageView",
-                "The link \"%1\" will open in a browser. It may be a security risk, it could de-anonymise you"
-                " or download malicious data. Are you sure?").arg(unicode(link.toString())),
-            QtGui.QMessageBox.Yes,
-            QtGui.QMessageBox.No)
-        if reply == QtGui.QMessageBox.Yes:
+                "The link \"{0}\" will open in a browser. It may be"
+                " a security risk, it could de-anonymise you or download"
+                " malicious data. Are you sure?"
+            ).format(unic(ustr(link.toString()))),
+            QtWidgets.QMessageBox.Yes, QtWidgets.QMessageBox.No)
+        if reply == QtWidgets.QMessageBox.Yes:
             QtGui.QDesktopServices.openUrl(link)
 
     def loadResource(self, restype, name):
         """
-        Callback for loading referenced objects, such as an image. For security reasons at the moment doesn't do
-        anything)
+        Callback for loading referenced objects, such as an image.
+        For security reasons at the moment doesn't do anything
         """
         pass
 
     def lazyRender(self):
         """
-        Partially render a message. This is to avoid UI freezing when loading huge messages. It continues loading as
-        you scroll down.
+        Partially render a message. This is to avoid UI freezing when
+        loading huge messages. It continues loading as you scroll down.
         """
         if self.rendering:
             return
         self.rendering = True
         position = self.verticalScrollBar().value()
         cursor = QtGui.QTextCursor(self.document())
-        while self.outpos < len(self.out) and self.verticalScrollBar().value(
-        ) >= self.document().size().height() - 2 * self.size().height():
+        while (
+            self.outpos < len(self.out)
+            and self.verticalScrollBar().value()
+            >= self.document().size().height() - 2 * self.size().height()
+        ):
             startpos = self.outpos
             self.outpos += 10240
             # find next end of tag
@@ -123,8 +127,9 @@ class MessageView(QtGui.QTextBrowser):
                 pos = self.out.find(">", self.outpos)
                 if pos > self.outpos:
                     self.outpos = pos + 1
-            cursor.movePosition(QtGui.QTextCursor.End, QtGui.QTextCursor.MoveAnchor)
-            cursor.insertHtml(QtCore.QString(self.out[startpos:self.outpos]))
+            cursor.movePosition(
+                QtGui.QTextCursor.End, QtGui.QTextCursor.MoveAnchor)
+            cursor.insertHtml(unic(self.out[startpos:self.outpos]))
         self.verticalScrollBar().setValue(position)
         self.rendering = False
 
@@ -133,9 +138,11 @@ class MessageView(QtGui.QTextBrowser):
         self.mode = MessageView.MODE_PLAIN
         out = self.html.raw
         if self.html.has_html:
-            out = "<div align=\"center\" style=\"text-decoration: underline;\"><b>" + unicode(
-                QtGui.QApplication.translate(
-                    "MessageView", "HTML detected, click here to display")) + "</b></div><br/>" + out
+            out = (
+                '<div align="center" style="text-decoration: underline;"><b>'
+                + unic(ustr(_translate(
+                    "MessageView", "HTML detected, click here to display"
+                ))) + '</b></div><br/>' + out)
         self.out = out
         self.outpos = 0
         self.setHtml("")
@@ -144,10 +151,10 @@ class MessageView(QtGui.QTextBrowser):
     def showHTML(self):
         """Render message as HTML"""
         self.mode = MessageView.MODE_HTML
-        out = self.html.sanitised
-        out = "<div align=\"center\" style=\"text-decoration: underline;\"><b>" + unicode(
-            QtGui.QApplication.translate("MessageView", "Click here to disable HTML")) + "</b></div><br/>" + out
-        self.out = out
+        self.out = (
+            '<div align="center" style="text-decoration: underline;"><b>'
+            + _translate("MessageView", "Click here to disable HTML")
+            + '</b></div><br/>' + self.html.sanitised)
         self.outpos = 0
         self.setHtml("")
         self.lazyRender()
@@ -155,8 +162,6 @@ class MessageView(QtGui.QTextBrowser):
     def setContent(self, data):
         """Set message content from argument"""
         self.html = SafeHTMLParser()
-        self.html.reset()
-        self.html.reset_safe()
         self.html.allow_picture = True
         self.html.feed(data)
         self.html.close()

src/bitmessageqt/migrationwizard.py

@@ -1,16 +1,15 @@
-#!/usr/bin/env python2.7
-from PyQt4 import QtCore, QtGui
+from qtpy import QtCore, QtWidgets
 
-class MigrationWizardIntroPage(QtGui.QWizardPage):
+class MigrationWizardIntroPage(QtWidgets.QWizardPage):
     def __init__(self):
-        super(QtGui.QWizardPage, self).__init__()
+        super(QtWidgets.QWizardPage, self).__init__()
         self.setTitle("Migrating configuration")
 
-        label = QtGui.QLabel("This wizard will help you to migrate your configuration. "
+        label = QtWidgets.QLabel("This wizard will help you to migrate your configuration. "
             "You can still keep using PyBitMessage once you migrate, the changes are backwards compatible.")
         label.setWordWrap(True)
 
-        layout = QtGui.QVBoxLayout()
+        layout = QtWidgets.QVBoxLayout()
         layout.addWidget(label)
         self.setLayout(layout)
         
@@ -18,15 +17,15 @@ class MigrationWizardIntroPage(QtGui.QWizardPage):
         return 1
     
 
-class MigrationWizardAddressesPage(QtGui.QWizardPage):
+class MigrationWizardAddressesPage(QtWidgets.QWizardPage):
     def __init__(self, addresses):
-        super(QtGui.QWizardPage, self).__init__()
+        super(QtWidgets.QWizardPage, self).__init__()
         self.setTitle("Addresses")
 
-        label = QtGui.QLabel("Please select addresses that you are already using with mailchuck. ")
+        label = QtWidgets.QLabel("Please select addresses that you are already using with mailchuck. ")
         label.setWordWrap(True)
 
-        layout = QtGui.QVBoxLayout()
+        layout = QtWidgets.QVBoxLayout()
         layout.addWidget(label)
         self.setLayout(layout)
         
@@ -34,15 +33,15 @@ class MigrationWizardAddressesPage(QtGui.QWizardPage):
         return 10
     
 
-class MigrationWizardGPUPage(QtGui.QWizardPage):
+class MigrationWizardGPUPage(QtWidgets.QWizardPage):
     def __init__(self):
-        super(QtGui.QWizardPage, self).__init__()
+        super(QtWidgets.QWizardPage, self).__init__()
         self.setTitle("GPU")
 
-        label = QtGui.QLabel("Are you using a GPU? ")
+        label = QtWidgets.QLabel("Are you using a GPU? ")
         label.setWordWrap(True)
 
-        layout = QtGui.QVBoxLayout()
+        layout = QtWidgets.QVBoxLayout()
         layout.addWidget(label)
         self.setLayout(layout)
         
@@ -50,22 +49,22 @@ class MigrationWizardGPUPage(QtGui.QWizardPage):
         return 10
     
 
-class MigrationWizardConclusionPage(QtGui.QWizardPage):
+class MigrationWizardConclusionPage(QtWidgets.QWizardPage):
     def __init__(self):
-        super(QtGui.QWizardPage, self).__init__()
+        super(QtWidgets.QWizardPage, self).__init__()
         self.setTitle("All done!")
 
-        label = QtGui.QLabel("You successfully migrated.")
+        label = QtWidgets.QLabel("You successfully migrated.")
         label.setWordWrap(True)
 
-        layout = QtGui.QVBoxLayout()
+        layout = QtWidgets.QVBoxLayout()
         layout.addWidget(label)
         self.setLayout(layout)
 
 
-class Ui_MigrationWizard(QtGui.QWizard):
+class Ui_MigrationWizard(QtWidgets.QWizard):
     def __init__(self, addresses):
-        super(QtGui.QWizard, self).__init__()
+        super(QtWidgets.QWizard, self).__init__()
 
         self.pages = {}
         

src/bitmessageqt/networkstatus.py

@@ -4,26 +4,28 @@ Network status tab widget definition.
 
 import time
 
-from PyQt4 import QtCore, QtGui
+from qtpy import QtCore, QtGui, QtWidgets
 
 import l10n
 import network.stats
 import state
-import widgets
+from bitmessageqt import widgets
 from network import connectionpool, knownnodes
-from retranslateui import RetranslateMixin
+from .retranslateui import RetranslateMixin
 from tr import _translate
-from uisignaler import UISignaler
+from .uisignaler import UISignaler
 
 
-class NetworkStatus(QtGui.QWidget, RetranslateMixin):
+class NetworkStatus(QtWidgets.QWidget, RetranslateMixin):
     """Network status tab"""
     def __init__(self, parent=None):
         super(NetworkStatus, self).__init__(parent)
         widgets.load('networkstatus.ui', self)
 
         header = self.tableWidgetConnectionCount.horizontalHeader()
-        header.setResizeMode(QtGui.QHeaderView.ResizeToContents)
+        header.setSectionResizeMode(QtWidgets.QHeaderView.ResizeToContents)
+        header.setSectionResizeMode(0, QtWidgets.QHeaderView.Stretch)
+        header.setSectionResizeMode(2, QtWidgets.QHeaderView.Stretch)
 
         # Somehow this value was 5 when I tested
         if header.sortIndicatorSection() > 4:
@@ -32,20 +34,17 @@ class NetworkStatus(QtGui.QWidget, RetranslateMixin):
         self.startup = time.localtime()
 
         self.UISignalThread = UISignaler.get()
-        # pylint: disable=no-member
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateNumberOfMessagesProcessed()"), self.updateNumberOfMessagesProcessed)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateNumberOfPubkeysProcessed()"), self.updateNumberOfPubkeysProcessed)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateNumberOfBroadcastsProcessed()"), self.updateNumberOfBroadcastsProcessed)
-        QtCore.QObject.connect(self.UISignalThread, QtCore.SIGNAL(
-            "updateNetworkStatusTab(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"), self.updateNetworkStatusTab)
+        self.UISignalThread.updateNumberOfMessagesProcessed.connect(
+            self.updateNumberOfMessagesProcessed)
+        self.UISignalThread.updateNumberOfPubkeysProcessed.connect(
+            self.updateNumberOfPubkeysProcessed)
+        self.UISignalThread.updateNumberOfBroadcastsProcessed.connect(
+            self.updateNumberOfBroadcastsProcessed)
+        self.UISignalThread.updateNetworkStatusTab.connect(
+            self.updateNetworkStatusTab)
 
         self.timer = QtCore.QTimer()
-
-        QtCore.QObject.connect(self.timer, QtCore.SIGNAL("timeout()"), self.runEveryTwoSeconds)
-        # pylint: enable=no-member
+        self.timer.timeout.connect(self.runEveryTwoSeconds)
 
     def startUpdate(self):
         """Start a timer to update counters every 2 seconds"""
@@ -57,91 +56,66 @@ class NetworkStatus(QtGui.QWidget, RetranslateMixin):
         """Stop counter update timer"""
         self.timer.stop()
 
-    def formatBytes(self, num):
+    @staticmethod
+    def formatBytes(num):
         """Format bytes nicely (SI prefixes)"""
-        # pylint: disable=no-self-use
-        for x in [
-                _translate(
-                    "networkstatus",
-                    "byte(s)",
-                    None,
-                    QtCore.QCoreApplication.CodecForTr,
-                    num),
-                "kB",
-                "MB",
-                "GB",
-        ]:
+        for x in (
+            _translate("networkstatus", "byte(s)", None, num),
+            "kB", "MB", "GB"
+        ):
             if num < 1000.0:
                 return "%3.0f %s" % (num, x)
             num /= 1000.0
-        return "%3.0f %s" % (num, 'TB')
+        return "%3.0f %s" % (num, "TB")
 
-    def formatByteRate(self, num):
+    @staticmethod
+    def formatByteRate(num):
         """Format transfer speed in kB/s"""
-        # pylint: disable=no-self-use
         num /= 1000
         return "%4.0f kB" % num
 
     def updateNumberOfObjectsToBeSynced(self):
         """Update the counter for number of objects to be synced"""
-        self.labelSyncStatus.setText(
-            _translate(
-                "networkstatus",
-                "Object(s) to be synced: %n",
-                None,
-                QtCore.QCoreApplication.CodecForTr,
-                network.stats.pendingDownload()
-                + network.stats.pendingUpload()))
+        self.labelSyncStatus.setText(_translate(
+            "networkstatus", "Object(s) to be synced: %n", None,
+            network.stats.pendingDownload() + network.stats.pendingUpload()))
 
     def updateNumberOfMessagesProcessed(self):
         """Update the counter for number of processed messages"""
         self.updateNumberOfObjectsToBeSynced()
-        self.labelMessageCount.setText(
-            _translate(
-                "networkstatus",
-                "Processed %n person-to-person message(s).",
-                None,
-                QtCore.QCoreApplication.CodecForTr,
-                state.numberOfMessagesProcessed))
+        self.labelMessageCount.setText(_translate(
+            "networkstatus", "Processed %n person-to-person message(s).",
+            None, state.numberOfMessagesProcessed))
 
     def updateNumberOfBroadcastsProcessed(self):
         """Update the counter for the number of processed broadcasts"""
         self.updateNumberOfObjectsToBeSynced()
-        self.labelBroadcastCount.setText(
-            _translate(
-                "networkstatus",
-                "Processed %n broadcast message(s).",
-                None,
-                QtCore.QCoreApplication.CodecForTr,
-                state.numberOfBroadcastsProcessed))
+        self.labelBroadcastCount.setText(_translate(
+            "networkstatus", "Processed %n broadcast message(s).", None,
+            state.numberOfBroadcastsProcessed))
 
     def updateNumberOfPubkeysProcessed(self):
         """Update the counter for the number of processed pubkeys"""
         self.updateNumberOfObjectsToBeSynced()
-        self.labelPubkeyCount.setText(
-            _translate(
-                "networkstatus",
-                "Processed %n public key(s).",
-                None,
-                QtCore.QCoreApplication.CodecForTr,
-                state.numberOfPubkeysProcessed))
+        self.labelPubkeyCount.setText(_translate(
+            "networkstatus", "Processed %n public key(s).", None,
+            state.numberOfPubkeysProcessed))
 
     def updateNumberOfBytes(self):
         """
-        This function is run every two seconds, so we divide the rate of bytes
-        sent and received by 2.
+        This function is run every two seconds, so we divide the rate
+        of bytes sent and received by 2.
         """
-        self.labelBytesRecvCount.setText(
-            _translate(
-                "networkstatus",
-                "Down: %1/s  Total: %2").arg(
-                    self.formatByteRate(network.stats.downloadSpeed()),
-                    self.formatBytes(network.stats.receivedBytes())))
-        self.labelBytesSentCount.setText(
-            _translate(
-                "networkstatus", "Up: %1/s  Total: %2").arg(
-                    self.formatByteRate(network.stats.uploadSpeed()),
-                    self.formatBytes(network.stats.sentBytes())))
+        self.labelBytesRecvCount.setText(_translate(
+            "networkstatus", "Down: {0}/s  Total: {1}").format(
+                self.formatByteRate(network.stats.downloadSpeed()),
+                self.formatBytes(network.stats.receivedBytes())
+        ))
+        self.labelBytesSentCount.setText(_translate(
+            "networkstatus", "Up: {0}/s  Total: {1}").format(
+                self.formatByteRate(network.stats.uploadSpeed()),
+                self.formatBytes(network.stats.sentBytes())
+        ))
 
     def updateNetworkStatusTab(self, outbound, add, destination):
         """Add or remove an entry to the list of connected peers"""
@@ -168,67 +142,67 @@ class NetworkStatus(QtGui.QWidget, RetranslateMixin):
         if add:
             self.tableWidgetConnectionCount.insertRow(0)
             self.tableWidgetConnectionCount.setItem(
-                0, 0,
-                QtGui.QTableWidgetItem("%s:%i" % (destination.host, destination.port))
-            )
+                0, 0, QtWidgets.QTableWidgetItem(
+                    "%s:%i" % (destination.host, destination.port)))
             self.tableWidgetConnectionCount.setItem(
-                0, 2,
-                QtGui.QTableWidgetItem("%s" % (c.userAgent))
-            )
+                0, 2, QtWidgets.QTableWidgetItem("%s" % (c.userAgent.decode("utf-8", "replace"))))
             self.tableWidgetConnectionCount.setItem(
-                0, 3,
-                QtGui.QTableWidgetItem("%s" % (c.tlsVersion))
-            )
+                0, 3, QtWidgets.QTableWidgetItem("%s" % (c.tlsVersion)))
             self.tableWidgetConnectionCount.setItem(
-                0, 4,
-                QtGui.QTableWidgetItem("%s" % (",".join(map(str, c.streams))))
-            )
+                0, 4, QtWidgets.QTableWidgetItem(
+                    "%s" % ",".join(map(str, c.streams))))
             try:
                 # .. todo:: FIXME: hard coded stream no
-                rating = "%.1f" % (knownnodes.knownNodes[1][destination]['rating'])
+                rating = "%.1f" % knownnodes.knownNodes[1][destination]['rating']
             except KeyError:
                 rating = "-"
             self.tableWidgetConnectionCount.setItem(
-                0, 1,
-                QtGui.QTableWidgetItem("%s" % (rating))
-            )
+                0, 1, QtWidgets.QTableWidgetItem("%s" % (rating)))
             if outbound:
-                brush = QtGui.QBrush(QtGui.QColor("yellow"), QtCore.Qt.SolidPattern)
+                brush = QtGui.QBrush(
+                    QtGui.QColor("yellow"), QtCore.Qt.SolidPattern)
             else:
-                brush = QtGui.QBrush(QtGui.QColor("green"), QtCore.Qt.SolidPattern)
+                brush = QtGui.QBrush(
+                    QtGui.QColor("green"), QtCore.Qt.SolidPattern)
             for j in range(1):
                 self.tableWidgetConnectionCount.item(0, j).setBackground(brush)
-            self.tableWidgetConnectionCount.item(0, 0).setData(QtCore.Qt.UserRole, destination)
-            self.tableWidgetConnectionCount.item(0, 1).setData(QtCore.Qt.UserRole, outbound)
+            self.tableWidgetConnectionCount.item(0, 0).setData(
+                QtCore.Qt.UserRole, destination)
+            self.tableWidgetConnectionCount.item(0, 1).setData(
+                QtCore.Qt.UserRole, outbound)
         else:
             if not connectionpool.pool.inboundConnections:
                 self.window().setStatusIcon('yellow')
             for i in range(self.tableWidgetConnectionCount.rowCount()):
-                if self.tableWidgetConnectionCount.item(i, 0).data(QtCore.Qt.UserRole).toPyObject() != destination:
+                if self.tableWidgetConnectionCount.item(i, 0).data(
+                        QtCore.Qt.UserRole) != destination:
                     continue
-                if self.tableWidgetConnectionCount.item(i, 1).data(QtCore.Qt.UserRole).toPyObject() == outbound:
+                if self.tableWidgetConnectionCount.item(i, 1).data(
+                        QtCore.Qt.UserRole) == outbound:
                     self.tableWidgetConnectionCount.removeRow(i)
                     break
 
         self.tableWidgetConnectionCount.setUpdatesEnabled(True)
         self.tableWidgetConnectionCount.setSortingEnabled(True)
-        self.labelTotalConnections.setText(
-            _translate(
-                "networkstatus", "Total Connections: %1").arg(
-                    str(self.tableWidgetConnectionCount.rowCount())))
-        # FYI: The 'singlelistener' thread sets the icon color to green when it
-        # receives an incoming connection, meaning that the user's firewall is
-        # configured correctly.
-        if self.tableWidgetConnectionCount.rowCount() and state.statusIconColor == 'red':
-            self.window().setStatusIcon('yellow')
-        elif self.tableWidgetConnectionCount.rowCount() == 0 and state.statusIconColor != "red":
+        self.labelTotalConnections.setText(_translate(
+            "networkstatus", "Total Connections: {0}").format(
+                self.tableWidgetConnectionCount.rowCount()
+        ))
+        # FYI: The 'singlelistener' thread sets the icon color to green
+        # when it receives an incoming connection, meaning that the user's
+        # firewall is configured correctly.
+        if self.tableWidgetConnectionCount.rowCount():
+            if state.statusIconColor == 'red':
+                self.window().setStatusIcon('yellow')
+        elif state.statusIconColor != 'red':
             self.window().setStatusIcon('red')
 
     # timer driven
     def runEveryTwoSeconds(self):
         """Updates counters, runs every 2 seconds if the timer is running"""
-        self.labelLookupsPerSecond.setText(_translate("networkstatus", "Inventory lookups per second: %1").arg(
-            str(state.Inventory.numberOfInventoryLookupsPerformed / 2)))
+        self.labelLookupsPerSecond.setText(_translate(
+            "networkstatus", "Inventory lookups per second: {0}"
+        ).format(state.Inventory.numberOfInventoryLookupsPerformed / 2))
         state.Inventory.numberOfInventoryLookupsPerformed = 0
         self.updateNumberOfBytes()
         self.updateNumberOfObjectsToBeSynced()
@@ -236,13 +210,12 @@ class NetworkStatus(QtGui.QWidget, RetranslateMixin):
     def retranslateUi(self):
         """Conventional Qt Designer method for dynamic l10n"""
         super(NetworkStatus, self).retranslateUi()
-        self.labelTotalConnections.setText(
-            _translate(
-                "networkstatus", "Total Connections: %1").arg(
-                    str(self.tableWidgetConnectionCount.rowCount())))
+        self.labelTotalConnections.setText(_translate(
+            "networkstatus", "Total Connections: {0}"
+        ).format(self.tableWidgetConnectionCount.rowCount()))
         self.labelStartupTime.setText(_translate(
-            "networkstatus", "Since startup on %1"
-        ).arg(l10n.formatTimestamp(self.startup)))
+            "networkstatus", "Since startup on {0}"
+        ).format(l10n.formatTimestamp(self.startup)))
         self.updateNumberOfMessagesProcessed()
         self.updateNumberOfBroadcastsProcessed()
         self.updateNumberOfPubkeysProcessed()

src/bitmessageqt/networkstatus.ui

@@ -100,6 +100,9 @@
          <property name="sortingEnabled">
           <bool>true</bool>
          </property>
+         <property name="wordWrap">
+          <bool>false</bool>
+         </property>
          <attribute name="horizontalHeaderCascadingSectionResizes">
           <bool>true</bool>
          </attribute>
@@ -109,9 +112,6 @@
          <attribute name="horizontalHeaderHighlightSections">
           <bool>false</bool>
          </attribute>
-         <attribute name="horizontalHeaderStretchLastSection">
-          <bool>true</bool>
-         </attribute>
          <attribute name="verticalHeaderVisible">
           <bool>false</bool>
          </attribute>
@@ -296,11 +296,8 @@
   <customwidget>
    <class>STableWidget</class>
    <extends>QTableWidget</extends>
-   <header>bitmessageqt/settingsmixin.h</header>
+   <header>bitmessageqt.settingsmixin</header>
   </customwidget>
  </customwidgets>
- <resources>
-  <include location="bitmessage_icons.qrc"/>
- </resources>
  <connections/>
 </ui>

src/bitmessageqt/newaddressdialog.ui

@@ -375,7 +375,7 @@ The 'Random Number' option is selected by default but deterministic addresses ha
    <sender>radioButtonDeterministicAddress</sender>
    <signal>toggled(bool)</signal>
    <receiver>groupBoxDeterministic</receiver>
-   <slot>setShown(bool)</slot>
+   <slot>setVisible(bool)</slot>
    <hints>
     <hint type="sourcelabel">
      <x>92</x>
@@ -391,7 +391,7 @@ The 'Random Number' option is selected by default but deterministic addresses ha
    <sender>radioButtonRandomAddress</sender>
    <signal>toggled(bool)</signal>
    <receiver>groupBox</receiver>
-   <slot>setShown(bool)</slot>
+   <slot>setVisible(bool)</slot>
    <hints>
     <hint type="sourcelabel">
      <x>72</x>

src/bitmessageqt/newchandialog.py

@@ -1,44 +1,34 @@
 """
-src/bitmessageqt/newchandialog.py
-=================================
-
+NewChanDialog class definition
 """
 
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr, unic
+from qtpy import QtCore, QtWidgets
 
-import widgets
+from bitmessageqt import widgets
 from addresses import addBMIfNotPresent
-from addressvalidator import AddressValidator, PassPhraseValidator
+from .addressvalidator import AddressValidator, PassPhraseValidator
 from queues import (
     addressGeneratorQueue, apiAddressGeneratorReturnQueue, UISignalQueue)
 from tr import _translate
-from utils import str_chan
+from .utils import str_chan
 
 
-class NewChanDialog(QtGui.QDialog):
-    """The `New Chan` dialog"""
+class NewChanDialog(QtWidgets.QDialog):
+    """The "New Chan" dialog"""
     def __init__(self, parent=None):
         super(NewChanDialog, self).__init__(parent)
         widgets.load('newchandialog.ui', self)
         self.parent = parent
-        self.chanAddress.setValidator(
-            AddressValidator(
-                self.chanAddress,
-                self.chanPassPhrase,
-                self.validatorFeedback,
-                self.buttonBox,
-                False))
-        self.chanPassPhrase.setValidator(
-            PassPhraseValidator(
-                self.chanPassPhrase,
-                self.chanAddress,
-                self.validatorFeedback,
-                self.buttonBox,
-                False))
+        self.chanAddress.setValidator(AddressValidator(
+            self.chanAddress, self.chanPassPhrase, self.validatorFeedback,
+            self.buttonBox.button(QtWidgets.QDialogButtonBox.Ok), False))
+        self.chanPassPhrase.setValidator(PassPhraseValidator(
+            self.chanPassPhrase, self.chanAddress, self.validatorFeedback,
+            self.buttonBox.button(QtWidgets.QDialogButtonBox.Ok), False))
 
         self.timer = QtCore.QTimer()
-        QtCore.QObject.connect(  # pylint: disable=no-member
-            self.timer, QtCore.SIGNAL("timeout()"), self.delayedUpdateStatus)
+        self.timer.timeout.connect(self.delayedUpdateStatus)
         self.timer.start(500)  # milliseconds
         self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
         self.show()
@@ -52,32 +42,38 @@ class NewChanDialog(QtGui.QDialog):
         self.timer.stop()
         self.hide()
         apiAddressGeneratorReturnQueue.queue.clear()
-        if self.chanAddress.text().toUtf8() == "":
+        if ustr(self.chanAddress.text()) == "":
             addressGeneratorQueue.put(
-                ('createChan', 4, 1, str_chan + ' ' + str(self.chanPassPhrase.text().toUtf8()),
-                 self.chanPassPhrase.text().toUtf8(),
+                ('createChan', 4, 1, str_chan + ' ' + ustr(self.chanPassPhrase.text()),
+                 ustr(self.chanPassPhrase.text()).encode("utf-8", "replace"),
                  True))
         else:
             addressGeneratorQueue.put(
-                ('joinChan', addBMIfNotPresent(self.chanAddress.text().toUtf8()),
-                 str_chan + ' ' + str(self.chanPassPhrase.text().toUtf8()),
-                 self.chanPassPhrase.text().toUtf8(),
+                ('joinChan', addBMIfNotPresent(ustr(self.chanAddress.text())),
+                 str_chan + ' ' + ustr(self.chanPassPhrase.text()),
+                 ustr(self.chanPassPhrase.text()).encode("utf-8", "replace"),
                  True))
         addressGeneratorReturnValue = apiAddressGeneratorReturnQueue.get(True)
-        if addressGeneratorReturnValue and addressGeneratorReturnValue[0] != 'chan name does not match address':
+        if len(addressGeneratorReturnValue) > 0 and addressGeneratorReturnValue[0] != 'chan name does not match address':
             UISignalQueue.put(('updateStatusBar', _translate(
-                "newchandialog", "Successfully created / joined chan %1").arg(unicode(self.chanPassPhrase.text()))))
+                "newchandialog", "Successfully created / joined chan {0}").format(unic(ustr(self.chanPassPhrase.text())))))
             self.parent.ui.tabWidget.setCurrentIndex(
                 self.parent.ui.tabWidget.indexOf(self.parent.ui.chans)
             )
-            self.done(QtGui.QDialog.Accepted)
+            self.done(QtWidgets.QDialog.Accepted)
         else:
-            UISignalQueue.put(('updateStatusBar', _translate("newchandialog", "Chan creation / joining failed")))
-            self.done(QtGui.QDialog.Rejected)
+            UISignalQueue.put((
+                'updateStatusBar',
+                _translate("newchandialog", "Chan creation / joining failed")
+            ))
+            self.done(QtWidgets.QDialog.Rejected)
 
     def reject(self):
         """Cancel joining the chan"""
         self.timer.stop()
         self.hide()
-        UISignalQueue.put(('updateStatusBar', _translate("newchandialog", "Chan creation / joining cancelled")))
-        self.done(QtGui.QDialog.Rejected)
+        UISignalQueue.put((
+            'updateStatusBar',
+            _translate("newchandialog", "Chan creation / joining cancelled")
+        ))
+        self.done(QtWidgets.QDialog.Rejected)

src/bitmessageqt/retranslateui.py

@@ -1,20 +1,21 @@
-from os import path
-from PyQt4 import QtGui
-from debug import logger
-import widgets
+from unqstr import ustr
+import six
+from bitmessageqt import widgets
+from qtpy import QtWidgets
+
 
 class RetranslateMixin(object):
     def retranslateUi(self):
-        defaults = QtGui.QWidget()
+        defaults = QtWidgets.QWidget()
         widgets.load(self.__class__.__name__.lower() + '.ui', defaults)
-        for attr, value in defaults.__dict__.iteritems():
+        for attr, value in six.iteritems(defaults.__dict__):
             setTextMethod = getattr(value, "setText", None)
             if callable(setTextMethod):
-                getattr(self, attr).setText(getattr(defaults, attr).text())
-            elif isinstance(value, QtGui.QTableWidget):
-                for i in range (value.columnCount()):
+                getattr(self, attr).setText(ustr(getattr(defaults, attr).text()))
+            elif isinstance(value, QtWidgets.QTableWidget):
+                for i in range(value.columnCount()):
                     getattr(self, attr).horizontalHeaderItem(i).setText(
-                        getattr(defaults, attr).horizontalHeaderItem(i).text())
-                for i in range (value.rowCount()):
+                        ustr(getattr(defaults, attr).horizontalHeaderItem(i).text()))
+                for i in range(value.rowCount()):
                     getattr(self, attr).verticalHeaderItem(i).setText(
-                        getattr(defaults, attr).verticalHeaderItem(i).text())
+                        ustr(getattr(defaults, attr).verticalHeaderItem(i).text()))

src/bitmessageqt/safehtmlparser.py

@@ -2,11 +2,11 @@
 
 import inspect
 import re
-from HTMLParser import HTMLParser
+from six.moves.html_parser import HTMLParser
 
-from urllib import quote_plus
-from urlparse import urlparse
+from six.moves.urllib.parse import quote_plus, urlparse
 
+from unqstr import ustr, unic
 
 class SafeHTMLParser(HTMLParser):
     """HTML parser with sanitisation"""
@@ -124,9 +124,9 @@ class SafeHTMLParser(HTMLParser):
 
     def feed(self, data):
         try:
-            data = unicode(data, 'utf-8')
-        except UnicodeDecodeError:
-            data = unicode(data, 'utf-8', errors='replace')
+            data = unic(ustr(data))
+        except TypeError:
+            pass
         HTMLParser.feed(self, data)
         tmp = SafeHTMLParser.replace_pre(data)
         tmp = self.uriregex1.sub(r'<a href="\1">\1</a>', tmp)

src/bitmessageqt/settings.py

@@ -1,13 +1,14 @@
 """
-This module setting file is for settings
+SettingsDialog class definition
 """
-import ConfigParser
+from six.moves import configparser
 import os
 import sys
 import tempfile
 
+from qtpy import QtCore, QtGui, QtWidgets
 import six
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr
 
 import debug
 import defaults
@@ -16,7 +17,7 @@ import openclpow
 import paths
 import queues
 import state
-import widgets
+from bitmessageqt import widgets
 from bmconfigparser import config as config_obj
 from helper_sql import sqlExecute, sqlStoredProcedure
 from helper_startup import start_proxyconfig
@@ -26,12 +27,18 @@ from network.asyncore_pollchoose import set_rates
 from tr import _translate
 
 
+try:
+    SafeConfigParser = configparser.SafeConfigParser
+except AttributeError:
+    # alpine linux, python3.12
+    SafeConfigParser = configparser.ConfigParser
+
 def getSOCKSProxyType(config):
     """Get user socksproxytype setting from *config*"""
     try:
-        result = ConfigParser.SafeConfigParser.get(
+        result = SafeConfigParser.get(
             config, 'bitmessagesettings', 'socksproxytype')
-    except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
+    except (configparser.NoSectionError, configparser.NoOptionError):
         return None
     else:
         if result.lower() in ('', 'none', 'false'):
@@ -39,14 +46,14 @@ def getSOCKSProxyType(config):
     return result
 
 
-class SettingsDialog(QtGui.QDialog):
+class SettingsDialog(QtWidgets.QDialog):
     """The "Settings" dialog"""
     # pylint: disable=too-many-instance-attributes
     def __init__(self, parent=None, firstrun=False):
         super(SettingsDialog, self).__init__(parent)
         widgets.load('settings.ui', self)
 
-        self.app = QtGui.QApplication.instance()
+        self.app = QtWidgets.QApplication.instance()
         self.parent = parent
         self.firstrun = firstrun
         self.config = config_obj
@@ -83,14 +90,14 @@ class SettingsDialog(QtGui.QDialog):
             self.tabWidgetSettings.setCurrentIndex(
                 self.tabWidgetSettings.indexOf(self.tabNetworkSettings)
             )
-        QtGui.QWidget.resize(self, QtGui.QWidget.sizeHint(self))
+        QtWidgets.QWidget.resize(self, QtWidgets.QWidget.sizeHint(self))
 
     def adjust_from_config(self, config):
         """Adjust all widgets state according to config settings"""
         # pylint: disable=too-many-branches,too-many-statements
 
         current_style = self.app.get_windowstyle()
-        for i, sk in enumerate(QtGui.QStyleFactory.keys()):
+        for i, sk in enumerate(QtWidgets.QStyleFactory.keys()):
             self.comboBoxStyle.addItem(sk)
             if sk == current_style:
                 self.comboBoxStyle.setCurrentIndex(i)
@@ -187,7 +194,7 @@ class SettingsDialog(QtGui.QDialog):
             else:
                 if self.checkBoxOnionOnly.isChecked():
                     self.checkBoxOnionOnly.setText(
-                        self.checkBoxOnionOnly.text() + ", " + _translate(
+                        ustr(self.checkBoxOnionOnly.text()) + ", " + _translate(
                             "MainWindow", "may cause connection problems!"))
                     self.checkBoxOnionOnly.setStyleSheet(
                         "QCheckBox { color : red; }")
@@ -324,10 +331,10 @@ class SettingsDialog(QtGui.QDialog):
             _translate("MainWindow", "Testing..."))
         nc = namecoin.namecoinConnection({
             'type': self.getNamecoinType(),
-            'host': str(self.lineEditNamecoinHost.text().toUtf8()),
-            'port': str(self.lineEditNamecoinPort.text().toUtf8()),
-            'user': str(self.lineEditNamecoinUser.text().toUtf8()),
-            'password': str(self.lineEditNamecoinPassword.text().toUtf8())
+            'host': ustr(self.lineEditNamecoinHost.text()),
+            'port': ustr(self.lineEditNamecoinPort.text()),
+            'user': ustr(self.lineEditNamecoinUser.text()),
+            'password': ustr(self.lineEditNamecoinPassword.text())
         })
         status, text = nc.test()
         self.labelNamecoinTestResult.setText(text)
@@ -342,7 +349,7 @@ class SettingsDialog(QtGui.QDialog):
 
     def choose_font(self):
         """Show the font selection dialog"""
-        font, valid = QtGui.QFontDialog.getFont()
+        font, valid = QtWidgets.QFontDialog.getFont()
         if valid:
             self.save_font_setting(font)
 
@@ -372,7 +379,7 @@ class SettingsDialog(QtGui.QDialog):
         self.config.set('bitmessagesettings', 'replybelow', str(
             self.checkBoxReplyBelow.isChecked()))
 
-        window_style = str(self.comboBoxStyle.currentText())
+        window_style = ustr(self.comboBoxStyle.currentText())
         if self.app.get_windowstyle() != window_style or self.config.safeGet(
             'bitmessagesettings', 'font'
         ) != self.font_setting:
@@ -386,8 +393,8 @@ class SettingsDialog(QtGui.QDialog):
                         " the window style or default font."), 1)
             ))
 
-        lang = str(self.languageComboBox.itemData(
-            self.languageComboBox.currentIndex()).toString())
+        lang = ustr(self.languageComboBox.itemData(
+            self.languageComboBox.currentIndex()))
         self.config.set('bitmessagesettings', 'userlocale', lang)
         self.parent.change_translation()
 
@@ -469,7 +476,7 @@ class SettingsDialog(QtGui.QDialog):
             self.config.set('bitmessagesettings', 'maxuploadrate', str(
                 int(float(self.lineEditMaxUploadRate.text()))))
         except ValueError:
-            QtGui.QMessageBox.about(
+            QtWidgets.QMessageBox.about(
                 self, _translate("MainWindow", "Number needed"),
                 _translate(
                     "MainWindow",
@@ -486,13 +493,13 @@ class SettingsDialog(QtGui.QDialog):
 
         self.config.set(
             'bitmessagesettings', 'namecoinrpctype', self.getNamecoinType())
-        self.config.set('bitmessagesettings', 'namecoinrpchost', str(
+        self.config.set('bitmessagesettings', 'namecoinrpchost', ustr(
             self.lineEditNamecoinHost.text()))
-        self.config.set('bitmessagesettings', 'namecoinrpcport', str(
+        self.config.set('bitmessagesettings', 'namecoinrpcport', ustr(
             self.lineEditNamecoinPort.text()))
-        self.config.set('bitmessagesettings', 'namecoinrpcuser', str(
+        self.config.set('bitmessagesettings', 'namecoinrpcuser', ustr(
             self.lineEditNamecoinUser.text()))
-        self.config.set('bitmessagesettings', 'namecoinrpcpassword', str(
+        self.config.set('bitmessagesettings', 'namecoinrpcpassword', ustr(
             self.lineEditNamecoinPassword.text()))
         self.parent.resetNamecoinConnection()
 
@@ -510,11 +517,11 @@ class SettingsDialog(QtGui.QDialog):
                     float(self.lineEditSmallMessageDifficulty.text())
                     * defaults.networkDefaultPayloadLengthExtraBytes)))
 
-        if self.comboBoxOpenCL.currentText().toUtf8() != self.config.safeGet(
-                'bitmessagesettings', 'opencl'):
+        if ustr(self.comboBoxOpenCL.currentText()) != ustr(self.config.safeGet(
+                'bitmessagesettings', 'opencl')):
             self.config.set(
                 'bitmessagesettings', 'opencl',
-                str(self.comboBoxOpenCL.currentText()))
+                ustr(self.comboBoxOpenCL.currentText()))
             queues.workerQueue.put(('resetPoW', ''))
 
         acceptableDifficultyChanged = False
@@ -524,7 +531,7 @@ class SettingsDialog(QtGui.QDialog):
             or float(self.lineEditMaxAcceptableTotalDifficulty.text()) == 0
         ):
             if self.config.get(
-                    'bitmessagesettings', 'maxacceptablenoncetrialsperbyte'
+                'bitmessagesettings', 'maxacceptablenoncetrialsperbyte'
             ) != str(int(
                 float(self.lineEditMaxAcceptableTotalDifficulty.text())
                     * defaults.networkDefaultProofOfWorkNonceTrialsPerByte)):
@@ -541,7 +548,7 @@ class SettingsDialog(QtGui.QDialog):
             or float(self.lineEditMaxAcceptableSmallMessageDifficulty.text()) == 0
         ):
             if self.config.get(
-                    'bitmessagesettings', 'maxacceptablepayloadlengthextrabytes'
+                'bitmessagesettings', 'maxacceptablepayloadlengthextrabytes'
             ) != str(int(
                 float(self.lineEditMaxAcceptableSmallMessageDifficulty.text())
                     * defaults.networkDefaultPayloadLengthExtraBytes)):
@@ -593,7 +600,7 @@ class SettingsDialog(QtGui.QDialog):
             if state.maximumLengthOfTimeToBotherResendingMessages < 432000:
                 # If the time period is less than 5 hours, we give
                 # zero values to all fields. No message will be sent again.
-                QtGui.QMessageBox.about(
+                QtWidgets.QMessageBox.about(
                     self,
                     _translate("MainWindow", "Will not resend ever"),
                     _translate(

src/bitmessageqt/settings.ui

@@ -1112,9 +1112,6 @@
   <tabstop>checkBoxSocksListen</tabstop>
   <tabstop>buttonBox</tabstop>
  </tabstops>
- <resources>
-  <include location="bitmessage_icons.qrc"/>
- </resources>
  <connections>
   <connection>
    <sender>buttonBox</sender>

src/bitmessageqt/settingsmixin.py

@@ -1,15 +1,16 @@
-#!/usr/bin/python2.7
 """
 src/settingsmixin.py
 ====================
 
 """
 
-from PyQt4 import QtCore, QtGui
+from unqstr import ustr
+from qtpy import QtCore, QtWidgets
 
 
 class SettingsMixin(object):
-    """Mixin for adding geometry and state saving between restarts."""
+    """Mixin for adding geometry and state saving between restarts"""
+
     def warnIfNoObjectName(self):
         """
         Handle objects which don't have a name. Currently it ignores them. Objects without a name can't have their
@@ -40,8 +41,9 @@ class SettingsMixin(object):
         self.warnIfNoObjectName()
         settings = QtCore.QSettings()
         try:
-            geom = settings.value("/".join([str(self.objectName()), "geometry"]))
-            target.restoreGeometry(geom.toByteArray() if hasattr(geom, 'toByteArray') else geom)
+            geom = settings.value(
+                "/".join([ustr(self.objectName()), "geometry"]))
+            target.restoreGeometry(geom)
         except Exception:
             pass
 
@@ -50,14 +52,15 @@ class SettingsMixin(object):
         self.warnIfNoObjectName()
         settings = QtCore.QSettings()
         try:
-            state = settings.value("/".join([str(self.objectName()), "state"]))
-            target.restoreState(state.toByteArray() if hasattr(state, 'toByteArray') else state)
+            state = settings.value("/".join([ustr(self.objectName()), "state"]))
+            target.restoreState(state)
         except Exception:
             pass
 
 
-class SMainWindow(QtGui.QMainWindow, SettingsMixin):
-    """Main window with Settings functionality."""
+class SMainWindow(QtWidgets.QMainWindow, SettingsMixin):
+    """Main window with Settings functionality"""
+
     def loadSettings(self):
         """Load main window settings."""
         self.readGeometry(self)
@@ -69,9 +72,9 @@ class SMainWindow(QtGui.QMainWindow, SettingsMixin):
         self.writeGeometry(self)
 
 
-class STableWidget(QtGui.QTableWidget, SettingsMixin):
+class STableWidget(QtWidgets.QTableWidget, SettingsMixin):
     """Table widget with Settings functionality"""
-    # pylint: disable=too-many-ancestors
+
     def loadSettings(self):
         """Load table settings."""
         self.readState(self.horizontalHeader())
@@ -81,8 +84,9 @@ class STableWidget(QtGui.QTableWidget, SettingsMixin):
         self.writeState(self.horizontalHeader())
 
 
-class SSplitter(QtGui.QSplitter, SettingsMixin):
-    """Splitter with Settings functionality."""
+class SSplitter(QtWidgets.QSplitter, SettingsMixin):
+    """Splitter with Settings functionality"""
+
     def loadSettings(self):
         """Load splitter settings"""
         self.readState(self)
@@ -92,17 +96,17 @@ class SSplitter(QtGui.QSplitter, SettingsMixin):
         self.writeState(self)
 
 
-class STreeWidget(QtGui.QTreeWidget, SettingsMixin):
-    """Tree widget with settings functionality."""
-    # pylint: disable=too-many-ancestors
+class STreeWidget(QtWidgets.QTreeWidget, SettingsMixin):
+    """Tree widget with settings functionality"""
+
     def loadSettings(self):
-        """Load tree settings."""
+        """Load tree settings. Unimplemented."""
         # recurse children
         # self.readState(self)
         pass
 
     def saveSettings(self):
-        """Save tree settings"""
+        """Save tree settings. Unimplemented."""
         # recurse children
         # self.writeState(self)
         pass

src/bitmessageqt/statusbar.py

@@ -1,11 +1,11 @@
-# pylint: disable=unused-argument
-"""Status bar Module"""
+"""BMStatusBar class definition"""
 
 from time import time
-from PyQt4 import QtGui
+
+from qtpy import QtWidgets
 
 
-class BMStatusBar(QtGui.QStatusBar):
+class BMStatusBar(QtWidgets.QStatusBar):
     """Status bar with queue and priorities"""
     duration = 10000
     deleteAfter = 60
@@ -16,21 +16,24 @@ class BMStatusBar(QtGui.QStatusBar):
         self.timer = self.startTimer(BMStatusBar.duration)
         self.iterator = 0
 
-    def timerEvent(self, event):
+    def timerEvent(self, event):  # pylint: disable=unused-argument
         """an event handler which allows to queue and prioritise messages to
         show in the status bar, for example if many messages come very quickly
         after one another, it adds delays and so on"""
         while len(self.important) > 0:
             self.iterator += 1
             try:
-                if time() > self.important[self.iterator][1] + BMStatusBar.deleteAfter:
+                if (
+                    self.important[self.iterator][1]
+                    + BMStatusBar.deleteAfter < time()
+                ):
                     del self.important[self.iterator]
                     self.iterator -= 1
                     continue
             except IndexError:
                 self.iterator = -1
                 continue
-            super(BMStatusBar, self).showMessage(self.important[self.iterator][0], 0)
+            self.showMessage(self.important[self.iterator][0], 0)
             break
 
     def addImportant(self, message):

src/bitmessageqt/support.py

@@ -1,14 +1,15 @@
 """Composing support request message functions."""
-# pylint: disable=no-member
 
 import ctypes
+import os
 import ssl
 import sys
 import time
 
-from PyQt4 import QtCore
+from unqstr import ustr, unic
+from dbcompat import dbstr
 
-import account
+from bitmessageqt import account
 import defaults
 import network.stats
 import paths
@@ -16,12 +17,12 @@ import proofofwork
 import queues
 import state
 from bmconfigparser import config
-from foldertree import AccountMixin
+from .foldertree import AccountMixin
 from helper_sql import sqlExecute, sqlQuery
 from l10n import getTranslationLanguage
 from openclpow import openclEnabled
 from pyelliptic.openssl import OpenSSL
-from settings import getSOCKSProxyType
+from .settings import getSOCKSProxyType
 from version import softwareVersion
 from tr import _translate
 
@@ -31,7 +32,7 @@ OLD_SUPPORT_ADDRESS = 'BM-2cTkCtMYkrSPwFTpgcBrMrf5d8oZwvMZWK'
 SUPPORT_ADDRESS = 'BM-2cUdgkDDAahwPAU6oD2A7DnjqZz3hgY832'
 SUPPORT_LABEL = _translate("Support", "PyBitmessage support")
 SUPPORT_MY_LABEL = _translate("Support", "My new address")
-SUPPORT_SUBJECT = 'Support request'
+SUPPORT_SUBJECT = _translate("Support", "Support request")
 SUPPORT_MESSAGE = _translate("Support", '''
 You can use this message to send a report to one of the PyBitmessage core \
 developers regarding PyBitmessage or the mailchuck.com email service. \
@@ -55,6 +56,7 @@ Operating system: {}
 Architecture: {}bit
 Python Version: {}
 OpenSSL Version: {}
+Qt API: {}
 Frozen: {}
 Portable mode: {}
 C PoW: {}
@@ -67,28 +69,35 @@ Connected hosts: {}
 
 
 def checkAddressBook(myapp):
-    sqlExecute('DELETE from addressbook WHERE address=?', OLD_SUPPORT_ADDRESS)
-    queryreturn = sqlQuery('SELECT * FROM addressbook WHERE address=?', SUPPORT_ADDRESS)
+    """
+    Add "PyBitmessage support" address to address book, remove old one if found.
+    """
+    sqlExecute('DELETE from addressbook WHERE address=?', dbstr(OLD_SUPPORT_ADDRESS))
+    queryreturn = sqlQuery(
+        'SELECT * FROM addressbook WHERE address=?', dbstr(SUPPORT_ADDRESS))
     if queryreturn == []:
         sqlExecute(
             'INSERT INTO addressbook VALUES (?,?)',
-            SUPPORT_LABEL.toUtf8(), SUPPORT_ADDRESS)
+            dbstr(SUPPORT_LABEL), dbstr(SUPPORT_ADDRESS))
         myapp.rerenderAddressBook()
 
 
 def checkHasNormalAddress():
-    for address in config.addresses():
+    """Returns first enabled normal address or False if not found."""
+    for address in config.addresses(True):
         acct = account.accountClass(address)
-        if acct.type == AccountMixin.NORMAL and config.safeGetBoolean(address, 'enabled'):
+        if acct.type == AccountMixin.NORMAL and config.safeGetBoolean(
+                address, 'enabled'):
             return address
     return False
 
 
 def createAddressIfNeeded(myapp):
+    """Checks if user has any anabled normal address, creates new one if no."""
     if not checkHasNormalAddress():
         queues.addressGeneratorQueue.put((
             'createRandomAddress', 4, 1,
-            str(SUPPORT_MY_LABEL.toUtf8()),
+            ustr(SUPPORT_MY_LABEL),
             1, "", False,
             defaults.networkDefaultProofOfWorkNonceTrialsPerByte,
             defaults.networkDefaultPayloadLengthExtraBytes
@@ -100,15 +109,20 @@ def createAddressIfNeeded(myapp):
 
 
 def createSupportMessage(myapp):
+    """
+    Prepare the support request message and switch to tab "Send"
+    """
     checkAddressBook(myapp)
     address = createAddressIfNeeded(myapp)
     if state.shutdown:
         return
 
     myapp.ui.lineEditSubject.setText(SUPPORT_SUBJECT)
-    addrIndex = myapp.ui.comboBoxSendFrom.findData(
-        address, QtCore.Qt.UserRole,
-        QtCore.Qt.MatchFixedString | QtCore.Qt.MatchCaseSensitive)
+    # addrIndex = myapp.ui.comboBoxSendFrom.findData(
+    #     address, QtCore.Qt.UserRole,
+    #     QtCore.Qt.MatchFixedString | QtCore.Qt.MatchCaseSensitive
+    # )
+    addrIndex = myapp.ui.comboBoxSendFrom.findData(address)
     if addrIndex == -1:  # something is very wrong
         return
     myapp.ui.comboBoxSendFrom.setCurrentIndex(addrIndex)
@@ -119,15 +133,13 @@ def createSupportMessage(myapp):
     if commit:
         version += " GIT " + commit
 
-    os = sys.platform
-    if os == "win32":
-        windowsversion = sys.getwindowsversion()
-        os = "Windows " + str(windowsversion[0]) + "." + str(windowsversion[1])
+    if sys.platform.startswith("win"):
+        # pylint: disable=no-member
+        osname = "Windows %s.%s" % sys.getwindowsversion()[:2]
     else:
         try:
-            from os import uname
-            unixversion = uname()
-            os = unixversion[0] + " " + unixversion[2]
+            unixversion = os.uname()
+            osname = unixversion[0] + " " + unixversion[2]
         except:
             pass
     architecture = "32" if ctypes.sizeof(ctypes.c_voidp) == 4 else "64"
@@ -136,22 +148,26 @@ def createSupportMessage(myapp):
     opensslversion = "%s (Python internal), %s (external for PyElliptic)" % (
         ssl.OPENSSL_VERSION, OpenSSL._version)
 
+    qtapi = os.environ.get('QT_API', 'fallback')
+
     frozen = "N/A"
     if paths.frozen:
         frozen = paths.frozen
-    portablemode = "True" if state.appdata == paths.lookupExeFolder() else "False"
+    portablemode = str(state.appdata == paths.lookupExeFolder())
     cpow = "True" if proofofwork.bmpow else "False"
-    openclpow = str(
+    openclpow = ustr(
         config.safeGet('bitmessagesettings', 'opencl')
     ) if openclEnabled() else "None"
     locale = getTranslationLanguage()
-    socks = getSOCKSProxyType(config) or "N/A"
-    upnp = config.safeGet('bitmessagesettings', 'upnp', "N/A")
+    socks = getSOCKSProxyType(config) or 'N/A'
+    upnp = config.safeGet('bitmessagesettings', 'upnp', 'N/A')
     connectedhosts = len(network.stats.connectedHostsList())
 
-    myapp.ui.textEditMessage.setText(unicode(SUPPORT_MESSAGE, 'utf-8').format(
-        version, os, architecture, pythonversion, opensslversion, frozen,
-        portablemode, cpow, openclpow, locale, socks, upnp, connectedhosts))
+    myapp.ui.textEditMessage.setText(unic(ustr(SUPPORT_MESSAGE).format(
+        version, osname, architecture, pythonversion, opensslversion, qtapi,
+        frozen, portablemode, cpow, openclpow, locale, socks, upnp,
+        connectedhosts
+    )))
 
     # single msg tab
     myapp.ui.tabWidgetSend.setCurrentIndex(

src/bitmessageqt/tests/addressbook.py

@@ -1,7 +1,7 @@
 import helper_addressbook
 from bitmessageqt.support import createAddressIfNeeded
 
-from main import TestBase
+from .main import TestBase
 
 
 class TestAddressbook(TestBase):

src/bitmessageqt/tests/main.py

@@ -3,7 +3,8 @@
 import sys
 import unittest
 
-from PyQt4 import QtCore, QtGui
+from qtpy import QtCore, QtWidgets
+from six import string_types
 from six.moves import queue
 
 import bitmessageqt
@@ -20,7 +21,7 @@ class TestBase(unittest.TestCase):
 
     def setUp(self):
         self.app = (
-            QtGui.QApplication.instance()
+            QtWidgets.QApplication.instance()
             or bitmessageqt.BitmessageQtApplication(sys.argv))
         self.window = self.app.activeWindow()
         if not self.window:
@@ -50,10 +51,7 @@ class TestMain(unittest.TestCase):
 
     def test_translate(self):
         """Check the results of _translate() with various args"""
-        self.assertIsInstance(
-            _translate("MainWindow", "Test"),
-            QtCore.QString
-        )
+        self.assertIsInstance(_translate("MainWindow", "Test"), string_types)
 
 
 class TestUISignaler(TestBase):

src/bitmessageqt/tests/settings.py

@@ -2,7 +2,7 @@
 import threading
 import time
 
-from PyQt4 import QtCore, QtGui, QtTest
+from qtpy import QtCore, QtWidgets, QtTest
 
 from bmconfigparser import config
 from bitmessageqt import settings
@@ -48,8 +48,8 @@ class TestSettings(TestBase):
 
         def call_font_dialog():
             """A function to get the open font dialog and accept it"""
-            font_dialog = QtGui.QApplication.activeModalWidget()
-            self.assertTrue(isinstance(font_dialog, QtGui.QFontDialog))
+            font_dialog = QtWidgets.QApplication.activeModalWidget()
+            self.assertTrue(isinstance(font_dialog, QtWidgets.QFontDialog))
             selected_font = font_dialog.currentFont()
             self.assertEqual(
                 config.safeGet('bitmessagesettings', 'font'), '{},{}'.format(
@@ -64,7 +64,7 @@ class TestSettings(TestBase):
         def click_font_button():
             """Use QtTest to click the button"""
             QtTest.QTest.mouseClick(
-                self.dialog.buttonFont, QtCore.Qt.LeftButton)
+                self.dialog.buttonFont, QtCore.Qt.MouseButton.LeftButton)
 
         style_count = style_control.count()
         self.assertGreater(style_count, 1)

src/bitmessageqt/tests/support.py

@@ -4,7 +4,9 @@ import sys
 
 from shared import isAddressInMyAddressBook
 
-from main import TestBase
+from .main import TestBase
+
+from unqstr import ustr
 
 
 class TestSupport(TestBase):
@@ -26,8 +28,8 @@ class TestSupport(TestBase):
         self.assertEqual(
             ui.tabWidget.currentIndex(), ui.tabWidget.indexOf(ui.send))
         self.assertEqual(
-            ui.lineEditTo.text(), self.SUPPORT_ADDRESS)
+            ustr(ui.lineEditTo.text()), ustr(self.SUPPORT_ADDRESS))
         self.assertEqual(
-            ui.lineEditSubject.text(), self.SUPPORT_SUBJECT)
+            ustr(ui.lineEditSubject.text()), ustr(self.SUPPORT_SUBJECT))
         self.assertIn(
             sys.version, ui.textEditMessage.toPlainText())

src/bitmessageqt/uisignaler.py

@@ -1,15 +1,35 @@
-
-from PyQt4.QtCore import QThread, SIGNAL
 import sys
 
+from qtpy import QtCore
+
 import queues
+from network.node import Peer
 
 
-class UISignaler(QThread):
+class UISignaler(QtCore.QThread):
     _instance = None
 
-    def __init__(self, parent=None):
-        QThread.__init__(self, parent)
+    writeNewAddressToTable = QtCore.Signal(str, str, str)
+    updateStatusBar = QtCore.Signal(object)
+    updateSentItemStatusByToAddress = QtCore.Signal(object, str)
+    updateSentItemStatusByAckdata = QtCore.Signal(object, str)
+    displayNewInboxMessage = QtCore.Signal(object, str, object, object, str)
+    displayNewSentMessage = QtCore.Signal(
+        object, str, str, object, object, str)
+    updateNetworkStatusTab = QtCore.Signal(bool, bool, Peer)
+    updateNumberOfMessagesProcessed = QtCore.Signal()
+    updateNumberOfPubkeysProcessed = QtCore.Signal()
+    updateNumberOfBroadcastsProcessed = QtCore.Signal()
+    setStatusIcon = QtCore.Signal(str)
+    changedInboxUnread = QtCore.Signal(str)
+    rerenderMessagelistFromLabels = QtCore.Signal()
+    rerenderMessagelistToLabels = QtCore.Signal()
+    rerenderAddressBook = QtCore.Signal()
+    rerenderSubscriptions = QtCore.Signal()
+    rerenderBlackWhiteList = QtCore.Signal()
+    removeInboxRowByMsgid = QtCore.Signal(str)
+    newVersionAvailable = QtCore.Signal(str)
+    displayAlert = QtCore.Signal(str, str, bool)
 
     @classmethod
     def get(cls):
@@ -22,69 +42,59 @@ class UISignaler(QThread):
             command, data = queues.UISignalQueue.get()
             if command == 'writeNewAddressToTable':
                 label, address, streamNumber = data
-                self.emit(
-                    SIGNAL("writeNewAddressToTable(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),
-                    label,
-                    address,
-                    str(streamNumber))
+                self.writeNewAddressToTable.emit(
+                    label, address, str(streamNumber))
             elif command == 'updateStatusBar':
-                self.emit(SIGNAL("updateStatusBar(PyQt_PyObject)"), data)
+                self.updateStatusBar.emit(data)
             elif command == 'updateSentItemStatusByToAddress':
                 toAddress, message = data
-                self.emit(SIGNAL(
-                    "updateSentItemStatusByToAddress(PyQt_PyObject,PyQt_PyObject)"), toAddress, message)
+                self.updateSentItemStatusByToAddress.emit(toAddress, message)
             elif command == 'updateSentItemStatusByAckdata':
                 ackData, message = data
-                self.emit(SIGNAL(
-                    "updateSentItemStatusByAckdata(PyQt_PyObject,PyQt_PyObject)"), ackData, message)
+                self.updateSentItemStatusByAckdata.emit(ackData, message)
             elif command == 'displayNewInboxMessage':
                 inventoryHash, toAddress, fromAddress, subject, body = data
-                self.emit(SIGNAL(
-                    "displayNewInboxMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),
-                    inventoryHash, toAddress, fromAddress, subject, body)
+
+                self.displayNewInboxMessage.emit(
+                    inventoryHash, toAddress, fromAddress,
+                    subject, body)
             elif command == 'displayNewSentMessage':
                 toAddress, fromLabel, fromAddress, subject, message, ackdata = data
-                self.emit(SIGNAL(
-                    "displayNewSentMessage(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),
-                    toAddress, fromLabel, fromAddress, subject, message, ackdata)
+                self.displayNewSentMessage.emit(
+                    toAddress, fromLabel, fromAddress,
+                    subject.decode('utf-8'), message, ackdata)
             elif command == 'updateNetworkStatusTab':
                 outbound, add, destination = data
-                self.emit(
-                    SIGNAL("updateNetworkStatusTab(PyQt_PyObject,PyQt_PyObject,PyQt_PyObject)"),
-                    outbound,
-                    add,
-                    destination)
+                self.updateNetworkStatusTab.emit(outbound, add, destination)
             elif command == 'updateNumberOfMessagesProcessed':
-                self.emit(SIGNAL("updateNumberOfMessagesProcessed()"))
+                self.updateNumberOfMessagesProcessed.emit()
             elif command == 'updateNumberOfPubkeysProcessed':
-                self.emit(SIGNAL("updateNumberOfPubkeysProcessed()"))
+                self.updateNumberOfPubkeysProcessed.emit()
             elif command == 'updateNumberOfBroadcastsProcessed':
-                self.emit(SIGNAL("updateNumberOfBroadcastsProcessed()"))
+                self.updateNumberOfBroadcastsProcessed.emit()
             elif command == 'setStatusIcon':
-                self.emit(SIGNAL("setStatusIcon(PyQt_PyObject)"), data)
+                self.setStatusIcon.emit(data)
             elif command == 'changedInboxUnread':
-                self.emit(SIGNAL("changedInboxUnread(PyQt_PyObject)"), data)
+                self.changedInboxUnread.emit(data)
             elif command == 'rerenderMessagelistFromLabels':
-                self.emit(SIGNAL("rerenderMessagelistFromLabels()"))
+                self.rerenderMessagelistFromLabels.emit()
             elif command == 'rerenderMessagelistToLabels':
-                self.emit(SIGNAL("rerenderMessagelistToLabels()"))
+                self.rerenderMessagelistToLabels.emit()
             elif command == 'rerenderAddressBook':
-                self.emit(SIGNAL("rerenderAddressBook()"))
+                self.rerenderAddressBook.emit()
             elif command == 'rerenderSubscriptions':
-                self.emit(SIGNAL("rerenderSubscriptions()"))
+                self.rerenderSubscriptions.emit()
             elif command == 'rerenderBlackWhiteList':
-                self.emit(SIGNAL("rerenderBlackWhiteList()"))
+                self.rerenderBlackWhiteList.emit()
             elif command == 'removeInboxRowByMsgid':
-                self.emit(SIGNAL("removeInboxRowByMsgid(PyQt_PyObject)"), data)
+                self.removeInboxRowByMsgid.emit(data)
             elif command == 'newVersionAvailable':
-                self.emit(SIGNAL("newVersionAvailable(PyQt_PyObject)"), data)
+                self.newVersionAvailable.emit(data)
             elif command == 'alert':
                 title, text, exitAfterUserClicksOk = data
-                self.emit(
-                    SIGNAL("displayAlert(PyQt_PyObject, PyQt_PyObject, PyQt_PyObject)"),
-                    title,
-                    text,
-                    exitAfterUserClicksOk)
+                self.displayAlert.emit(title, text, exitAfterUserClicksOk)
             else:
                 sys.stderr.write(
-                    'Command sent to UISignaler not recognized: %s\n' % command)
+                    'Command sent to UISignaler not recognized: %s\n'
+                    % command
+                )

src/bitmessageqt/utils.py

@@ -1,7 +1,7 @@
 import hashlib
 import os
 
-from PyQt4 import QtGui
+from qtpy import QtGui
 
 import state
 from addresses import addBMIfNotPresent
@@ -30,16 +30,18 @@ def identiconize(address):
     # It can be used as a pseudo-password to salt the generation of
     # the identicons to decrease the risk of attacks where someone creates
     # an address to mimic someone else's identicon.
-    identiconsuffix = config.get('bitmessagesettings', 'identiconsuffix')
+    data = addBMIfNotPresent(address) + config.get(
+        'bitmessagesettings', 'identiconsuffix')
+    data = data.encode("utf-8", "replace")
     if identicon_lib[:len('qidenticon')] == 'qidenticon':
         # originally by:
         # :Author:Shin Adachi <shn@glucose.jp>
         # Licesensed under FreeBSD License.
         # stripped from PIL and uses QT instead (by sendiulo, same license)
         import qidenticon
-        icon_hash = hashlib.md5(
-            addBMIfNotPresent(address) + identiconsuffix).hexdigest()
-        use_two_colors = identicon_lib[:len('qidenticon_two')] == 'qidenticon_two'
+        icon_hash = hashlib.md5(data).hexdigest()
+        use_two_colors = (
+            identicon_lib[:len('qidenticon_two')] == 'qidenticon_two')
         opacity = int(
             identicon_lib not in (
                 'qidenticon_x', 'qidenticon_two_x',
@@ -63,8 +65,7 @@ def identiconize(address):
         # https://github.com/azaghal/pydenticon
         # note that it requires pillow (or PIL) to be installed:
         # https://python-pillow.org/
-        idcon_render = Pydenticon(
-            addBMIfNotPresent(address) + identiconsuffix, size * 3)
+        idcon_render = Pydenticon(data, size * 3)
         rendering = idcon_render._render()
         data = rendering.convert("RGBA").tostring("raw", "RGBA")
         qim = QtGui.QImage(data, size, size, QtGui.QImage.Format_ARGB32)
@@ -81,7 +82,7 @@ def avatarize(address):
     falls back to identiconize(address)
     """
     idcon = QtGui.QIcon()
-    icon_hash = hashlib.md5(addBMIfNotPresent(address)).hexdigest()
+    icon_hash = hashlib.md5(addBMIfNotPresent(address).encode("utf-8", "replace")).hexdigest()
     if address == str_broadcast_subscribers:
         # don't hash [Broadcast subscribers]
         icon_hash = address
@@ -105,11 +106,9 @@ def avatarize(address):
         lower_default = state.appdata + 'avatars/' + 'default.' + ext.lower()
         upper_default = state.appdata + 'avatars/' + 'default.' + ext.upper()
         if os.path.isfile(lower_default):
-            default = lower_default
             idcon.addFile(lower_default)
             return idcon
         elif os.path.isfile(upper_default):
-            default = upper_default
             idcon.addFile(upper_default)
             return idcon
     # If no avatar is found

src/bitmessageqt/widgets.py

@@ -1,13 +1,15 @@
-from PyQt4 import uic
+from qtpy import uic
 import os.path
 import paths
-import sys
+
 
 def resource_path(resFile):
     baseDir = paths.codePath()
-    for subDir in ["ui", "bitmessageqt"]:
-        if os.path.isdir(os.path.join(baseDir, subDir)) and os.path.isfile(os.path.join(baseDir, subDir, resFile)):
-            return os.path.join(baseDir, subDir, resFile)
+    for subDir in ("ui", "bitmessageqt"):
+        path = os.path.join(baseDir, subDir, resFile)
+        if os.path.isfile(path):
+            return path
+
 
 def load(resFile, widget):
     uic.loadUi(resource_path(resFile), widget)

src/bmconfigparser.py

@@ -9,19 +9,24 @@ from datetime import datetime
 
 from six import string_types
 from six.moves import configparser
+from unqstr import ustr
 
 try:
     import state
 except ImportError:
     from pybitmessage import state
 
-SafeConfigParser = configparser.SafeConfigParser
+try:
+    SafeConfigParser = configparser.SafeConfigParser
+except AttributeError:
+    # alpine linux, python3.12
+    SafeConfigParser = configparser.ConfigParser
 config_ready = Event()
 
 
 class BMConfigParser(SafeConfigParser):
     """
-    Singleton class inherited from :class:`ConfigParser.SafeConfigParser`
+    Singleton class inherited from :class:`configparser.SafeConfigParser`
     with additional methods specific to bitmessage config.
     """
     # pylint: disable=too-many-ancestors
@@ -114,7 +119,8 @@ class BMConfigParser(SafeConfigParser):
         """Return a list of local bitmessage addresses (from section labels)"""
         sections = [x for x in self.sections() if x.startswith('BM-')]
         if sort:
-            sections.sort(key=lambda item: self.get(item, 'label').lower())
+            sections.sort(key=lambda item: ustr(self.get(item, 'label')) \
+                    .lower())
         return sections
 
     def save(self):

src/class_addressGenerator.py

@@ -1,5 +1,5 @@
 """
-A thread for creating addresses
+addressGenerator thread class definition
 """
 
 import time
@@ -211,8 +211,8 @@ class addressGenerator(StoppableThread):
                         'updateStatusBar',
                         _translate(
                             "MainWindow",
-                            "Generating %1 new addresses."
-                        ).arg(str(numberOfAddressesToMake))
+                            "Generating {0} new addresses."
+                        ).format(str(numberOfAddressesToMake))
                     ))
                 signingKeyNonce = 0
                 encryptionKeyNonce = 1
@@ -302,9 +302,9 @@ class addressGenerator(StoppableThread):
                                 'updateStatusBar',
                                 _translate(
                                     "MainWindow",
-                                    "%1 is already in 'Your Identities'."
+                                    "{0} is already in 'Your Identities'."
                                     " Not adding it again."
-                                ).arg(address)
+                                ).format(address)
                             ))
                         else:
                             self.logger.debug('label: %s', label)

src/class_objectProcessor.py

@@ -12,6 +12,7 @@ import subprocess  # nosec B404
 import threading
 import time
 from binascii import hexlify
+import sqlite3
 
 import helper_bitcoin
 import helper_inbox
@@ -33,6 +34,7 @@ from helper_sql import (
 from network import knownnodes, invQueue
 from network.node import Peer
 from tr import _translate
+from dbcompat import dbstr
 
 logger = logging.getLogger('default')
 
@@ -121,7 +123,7 @@ class objectProcessor(threading.Thread):
                         objectType, data = queues.objectProcessorQueue.get()
                         sql.execute(
                             'INSERT INTO objectprocessorqueue VALUES (?,?)',
-                            objectType, data)
+                            objectType, sqlite3.Binary(data))
                         numberOfObjectsThatWereInTheObjectProcessorQueue += 1
                 logger.debug(
                     'Saved %s objects from the objectProcessorQueue to'
@@ -140,19 +142,23 @@ class objectProcessor(threading.Thread):
         # bypass nonce and time, retain object type/version/stream + body
         readPosition = 16
 
-        if data[readPosition:] in state.ackdataForWhichImWatching:
+        data_bytes = bytes(data[readPosition:])
+        if data_bytes in state.ackdataForWhichImWatching:
             logger.info('This object is an acknowledgement bound for me.')
-            del state.ackdataForWhichImWatching[data[readPosition:]]
-            sqlExecute(
+            del state.ackdataForWhichImWatching[data_bytes]
+            rowcount = sqlExecute(
                 "UPDATE sent SET status='ackreceived', lastactiontime=?"
-                " WHERE ackdata=?", int(time.time()), data[readPosition:])
+                " WHERE ackdata=?", int(time.time()), sqlite3.Binary(data_bytes))
+            if rowcount < 1:
+                rowcount = sqlExecute(
+                    "UPDATE sent SET status='ackreceived', lastactiontime=?"
+                    " WHERE ackdata=CAST(? AS TEXT)", int(time.time()), data_bytes)
             queues.UISignalQueue.put((
                 'updateSentItemStatusByAckdata', (
-                    data[readPosition:],
-                    _translate(
+                    data_bytes, _translate(
                         "MainWindow",
-                        "Acknowledgement of the message received %1"
-                    ).arg(l10n.formatTimestamp()))
+                        "Acknowledgement of the message received {0}"
+                    ).format(l10n.formatTimestamp()))
             ))
         else:
             logger.debug('This object is not an acknowledgement bound for me.')
@@ -215,9 +221,10 @@ class objectProcessor(threading.Thread):
             logger.info(
                 'the hash requested in this getpubkey request is: %s',
                 hexlify(requestedHash))
+            requestedHash_bytes = bytes(requestedHash)
             # if this address hash is one of mine
-            if requestedHash in shared.myAddressesByHash:
-                myAddress = shared.myAddressesByHash[requestedHash]
+            if requestedHash_bytes in shared.myAddressesByHash:
+                myAddress = shared.myAddressesByHash[requestedHash_bytes]
         elif requestedAddressVersionNumber >= 4:
             requestedTag = data[readPosition:readPosition + 32]
             if len(requestedTag) != 32:
@@ -227,8 +234,9 @@ class objectProcessor(threading.Thread):
             logger.debug(
                 'the tag requested in this getpubkey request is: %s',
                 hexlify(requestedTag))
-            if requestedTag in shared.myAddressesByTag:
-                myAddress = shared.myAddressesByTag[requestedTag]
+            requestedTag_bytes = bytes(requestedTag)
+            if requestedTag_bytes in shared.myAddressesByTag:
+                myAddress = shared.myAddressesByTag[requestedTag_bytes]
 
         if myAddress == '':
             logger.info('This getpubkey request is not for any of my keys.')
@@ -299,12 +307,12 @@ class objectProcessor(threading.Thread):
                     '(within processpubkey) payloadLength less than 146.'
                     ' Sanity check failed.')
             readPosition += 4
-            pubSigningKey = '\x04' + data[readPosition:readPosition + 64]
+            pubSigningKey = b'\x04' + data[readPosition:readPosition + 64]
             # Is it possible for a public key to be invalid such that trying to
             # encrypt or sign with it will cause an error? If it is, it would
             # be easiest to test them here.
             readPosition += 64
-            pubEncryptionKey = '\x04' + data[readPosition:readPosition + 64]
+            pubEncryptionKey = b'\x04' + data[readPosition:readPosition + 64]
             if len(pubEncryptionKey) < 65:
                 return logger.debug(
                     'publicEncryptionKey length less than 64. Sanity check'
@@ -327,19 +335,19 @@ class objectProcessor(threading.Thread):
 
             queryreturn = sqlQuery(
                 "SELECT usedpersonally FROM pubkeys WHERE address=?"
-                " AND usedpersonally='yes'", address)
+                " AND usedpersonally='yes'", dbstr(address))
             # if this pubkey is already in our database and if we have
             # used it personally:
             if queryreturn != []:
                 logger.info(
                     'We HAVE used this pubkey personally. Updating time.')
-                t = (address, addressVersion, dataToStore,
+                t = (dbstr(address), addressVersion, sqlite3.Binary(dataToStore),
                      int(time.time()), 'yes')
             else:
                 logger.info(
                     'We have NOT used this pubkey personally. Inserting'
                     ' in database.')
-                t = (address, addressVersion, dataToStore,
+                t = (dbstr(address), addressVersion, sqlite3.Binary(dataToStore),
                      int(time.time()), 'no')
             sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
             self.possibleNewPubkey(address)
@@ -350,9 +358,9 @@ class objectProcessor(threading.Thread):
                     ' Sanity check failed.')
                 return
             readPosition += 4
-            pubSigningKey = '\x04' + data[readPosition:readPosition + 64]
+            pubSigningKey = b'\x04' + data[readPosition:readPosition + 64]
             readPosition += 64
-            pubEncryptionKey = '\x04' + data[readPosition:readPosition + 64]
+            pubEncryptionKey = b'\x04' + data[readPosition:readPosition + 64]
             readPosition += 64
             specifiedNonceTrialsPerByteLength = decodeVarint(
                 data[readPosition:readPosition + 10])[1]
@@ -389,20 +397,20 @@ class objectProcessor(threading.Thread):
             address = encodeAddress(addressVersion, streamNumber, ripe)
             queryreturn = sqlQuery(
                 "SELECT usedpersonally FROM pubkeys WHERE address=?"
-                " AND usedpersonally='yes'", address)
+                " AND usedpersonally='yes'", dbstr(address))
             # if this pubkey is already in our database and if we have
             # used it personally:
             if queryreturn != []:
                 logger.info(
                     'We HAVE used this pubkey personally. Updating time.')
-                t = (address, addressVersion, dataToStore,
-                     int(time.time()), 'yes')
+                t = (dbstr(address), addressVersion, sqlite3.Binary(dataToStore),
+                     int(time.time()), dbstr('yes'))
             else:
                 logger.info(
                     'We have NOT used this pubkey personally. Inserting'
                     ' in database.')
-                t = (address, addressVersion, dataToStore,
-                     int(time.time()), 'no')
+                t = (dbstr(address), addressVersion, sqlite3.Binary(dataToStore),
+                     int(time.time()), dbstr('no'))
             sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''', *t)
             self.possibleNewPubkey(address)
 
@@ -413,12 +421,13 @@ class objectProcessor(threading.Thread):
                     ' Sanity check failed.')
 
             tag = data[readPosition:readPosition + 32]
-            if tag not in state.neededPubkeys:
+            tag_bytes = bytes(tag)
+            if tag_bytes not in state.neededPubkeys:
                 return logger.info(
                     'We don\'t need this v4 pubkey. We didn\'t ask for it.')
 
             # Let us try to decrypt the pubkey
-            toAddress = state.neededPubkeys[tag][0]
+            toAddress = state.neededPubkeys[tag_bytes][0]
             if protocol.decryptAndCheckPubkeyPayload(data, toAddress) == \
                     'successful':
                 # At this point we know that we have been waiting on this
@@ -483,7 +492,7 @@ class objectProcessor(threading.Thread):
 
         # This is a message bound for me.
         # Look up my address based on the RIPE hash.
-        toAddress = shared.myAddressesByHash[toRipe]
+        toAddress = shared.myAddressesByHash[bytes(toRipe)]
         readPosition = 0
         sendersAddressVersionNumber, sendersAddressVersionNumberLength = \
             decodeVarint(decryptedData[readPosition:readPosition + 10])
@@ -507,9 +516,9 @@ class objectProcessor(threading.Thread):
             return
         readPosition += sendersStreamNumberLength
         readPosition += 4
-        pubSigningKey = '\x04' + decryptedData[readPosition:readPosition + 64]
+        pubSigningKey = b'\x04' + decryptedData[readPosition:readPosition + 64]
         readPosition += 64
-        pubEncryptionKey = '\x04' + decryptedData[readPosition:readPosition + 64]
+        pubEncryptionKey = b'\x04' + decryptedData[readPosition:readPosition + 64]
         readPosition += 64
         if sendersAddressVersionNumber >= 3:
             requiredAverageProofOfWorkNonceTrialsPerByte, varintLength = \
@@ -558,7 +567,7 @@ class objectProcessor(threading.Thread):
         readPosition += signatureLengthLength
         signature = decryptedData[
             readPosition:readPosition + signatureLength]
-        signedData = data[8:20] + encodeVarint(1) + encodeVarint(
+        signedData = bytes(data[8:20]) + encodeVarint(1) + encodeVarint(
             streamNumberAsClaimedByMsg
         ) + decryptedData[:positionOfBottomOfAckData]
 
@@ -590,11 +599,11 @@ class objectProcessor(threading.Thread):
         # person.
         sqlExecute(
             '''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
-            fromAddress,
+            dbstr(fromAddress),
             sendersAddressVersionNumber,
-            decryptedData[:endOfThePublicKeyPosition],
+            sqlite3.Binary(decryptedData[:endOfThePublicKeyPosition]),
             int(time.time()),
-            'yes')
+            dbstr('yes'))
 
         # Check to see whether we happen to be awaiting this
         # pubkey in order to send a message. If we are, it will do the POW
@@ -631,7 +640,7 @@ class objectProcessor(threading.Thread):
                 'bitmessagesettings', 'blackwhitelist') == 'black':
             queryreturn = sqlQuery(
                 "SELECT label FROM blacklist where address=? and enabled='1'",
-                fromAddress)
+                dbstr(fromAddress))
             if queryreturn != []:
                 logger.info('Message ignored because address is in blacklist.')
 
@@ -639,7 +648,7 @@ class objectProcessor(threading.Thread):
         else:  # We're using a whitelist
             queryreturn = sqlQuery(
                 "SELECT label FROM whitelist where address=? and enabled='1'",
-                fromAddress)
+                dbstr(fromAddress))
             if queryreturn == []:
                 logger.info(
                     'Message ignored because address not in whitelist.')
@@ -808,13 +817,14 @@ class objectProcessor(threading.Thread):
         elif broadcastVersion == 5:
             embeddedTag = data[readPosition:readPosition + 32]
             readPosition += 32
-            if embeddedTag not in shared.MyECSubscriptionCryptorObjects:
+            embeddedTag_bytes = bytes(embeddedTag)
+            if embeddedTag_bytes not in shared.MyECSubscriptionCryptorObjects:
                 logger.debug('We\'re not interested in this broadcast.')
                 return
             # We are interested in this broadcast because of its tag.
             # We're going to add some more data which is signed further down.
-            signedData = data[8:readPosition]
-            cryptorObject = shared.MyECSubscriptionCryptorObjects[embeddedTag]
+            signedData = bytes(data[8:readPosition])
+            cryptorObject = shared.MyECSubscriptionCryptorObjects[embeddedTag_bytes]
             try:
                 decryptedData = cryptorObject.decrypt(data[readPosition:])
                 logger.debug('EC decryption successful')
@@ -854,10 +864,10 @@ class objectProcessor(threading.Thread):
             )
         readPosition += sendersStreamLength
         readPosition += 4
-        sendersPubSigningKey = '\x04' + \
+        sendersPubSigningKey = b'\x04' + \
             decryptedData[readPosition:readPosition + 64]
         readPosition += 64
-        sendersPubEncryptionKey = '\x04' + \
+        sendersPubEncryptionKey = b'\x04' + \
             decryptedData[readPosition:readPosition + 64]
         readPosition += 64
         if sendersAddressVersion >= 3:
@@ -927,11 +937,11 @@ class objectProcessor(threading.Thread):
 
         # Let's store the public key in case we want to reply to this person.
         sqlExecute('''INSERT INTO pubkeys VALUES (?,?,?,?,?)''',
-                   fromAddress,
-                   sendersAddressVersion,
-                   decryptedData[:endOfPubkeyPosition],
+                   dbstr(fromAddress),
+                   dbstr(sendersAddressVersion),
+                   sqlite3.Binary(decryptedData[:endOfPubkeyPosition]),
                    int(time.time()),
-                   'yes')
+                   dbstr('yes'))
 
         # Check to see whether we happen to be awaiting this
         # pubkey in order to send a message. If we are, it will do the POW
@@ -997,8 +1007,9 @@ class objectProcessor(threading.Thread):
                 encodeVarint(addressVersion) + encodeVarint(streamNumber)
                 + ripe
             )[32:]
-            if tag in state.neededPubkeys:
-                del state.neededPubkeys[tag]
+            tag_bytes = bytes(tag)
+            if tag_bytes in state.neededPubkeys:
+                del state.neededPubkeys[tag_bytes]
                 self.sendMessages(address)
 
     @staticmethod
@@ -1012,7 +1023,7 @@ class objectProcessor(threading.Thread):
             "UPDATE sent SET status='doingmsgpow', retrynumber=0"
             " WHERE toaddress=?"
             " AND (status='awaitingpubkey' OR status='doingpubkeypow')"
-            " AND folder='sent'", address)
+            " AND folder='sent'", dbstr(address))
         queues.workerQueue.put(('sendmessage', ''))
 
     @staticmethod
@@ -1047,8 +1058,8 @@ class objectProcessor(threading.Thread):
         if checksum != hashlib.sha512(payload).digest()[0:4]:
             logger.info('ackdata checksum wrong. Not sending ackdata.')
             return False
-        command = command.rstrip('\x00')
-        if command != 'object':
+        command = command.rstrip(b'\x00')
+        if command != b'object':
             return False
         return True
 

src/class_singleCleaner.py

@@ -22,6 +22,7 @@ It resends messages when there has been no response:
 import gc
 import os
 import time
+import sqlite3
 
 import queues
 import state
@@ -29,6 +30,7 @@ from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
 from network import connectionpool, knownnodes, StoppableThread
 from tr import _translate
+from dbcompat import dbstr
 
 
 #: Equals 4 weeks. You could make this longer if you want
@@ -99,6 +101,8 @@ class singleCleaner(StoppableThread):
                     tick - state.maximumLengthOfTimeToBotherResendingMessages
                 )
                 for toAddress, ackData, status in queryreturn:
+                    toAddress = toAddress.decode("utf-8", "replace")
+                    status = status.decode("utf-8", "replace")
                     if status == 'awaitingpubkey':
                         self.resendPubkeyRequest(toAddress)
                     elif status == 'msgsent':
@@ -168,7 +172,7 @@ class singleCleaner(StoppableThread):
         ))
         sqlExecute(
             "UPDATE sent SET status = 'msgqueued'"
-            " WHERE toaddress = ? AND folder = 'sent'", address)
+            " WHERE toaddress = ? AND folder = 'sent'", dbstr(address))
         queues.workerQueue.put(('sendmessage', ''))
 
     def resendMsg(self, ackdata):
@@ -177,9 +181,13 @@ class singleCleaner(StoppableThread):
             'It has been a long time and we haven\'t heard an acknowledgement'
             ' to our msg. Sending again.'
         )
-        sqlExecute(
+        rowcount = sqlExecute(
             "UPDATE sent SET status = 'msgqueued'"
-            " WHERE ackdata = ? AND folder = 'sent'", ackdata)
+            " WHERE ackdata = ? AND folder = 'sent'", sqlite3.Binary(ackdata))
+        if rowcount < 1:
+            sqlExecute(
+                "UPDATE sent SET status = 'msgqueued'"
+                " WHERE ackdata = CAST(? AS TEXT) AND folder = 'sent'", ackdata)
         queues.workerQueue.put(('sendmessage', ''))
         queues.UISignalQueue.put((
             'updateStatusBar',

src/class_singleWorker.py

@@ -11,6 +11,7 @@ import time
 from binascii import hexlify, unhexlify
 from struct import pack
 from subprocess import call  # nosec
+import sqlite3
 
 import defaults
 import helper_inbox
@@ -24,12 +25,15 @@ import protocol
 import queues
 import shared
 import state
-import tr
 from addresses import decodeAddress, decodeVarint, encodeVarint
 from bmconfigparser import config
 from helper_sql import sqlExecute, sqlQuery
 from network import knownnodes, StoppableThread, invQueue
 from six.moves import configparser, queue
+from six.moves.reprlib import repr
+import six
+from dbcompat import dbstr
+from tr import _translate
 
 
 def sizeof_fmt(num, suffix='h/s'):
@@ -73,6 +77,7 @@ class singleWorker(StoppableThread):
             '''SELECT DISTINCT toaddress FROM sent'''
             ''' WHERE (status='awaitingpubkey' AND folder='sent')''')
         for toAddress, in queryreturn:
+            toAddress = toAddress.decode("utf-8", "replace")
             toAddressVersionNumber, toStreamNumber, toRipe = \
                 decodeAddress(toAddress)[1:]
             if toAddressVersionNumber <= 3:
@@ -87,7 +92,7 @@ class singleWorker(StoppableThread):
                 tag = doubleHashOfAddressData[32:]
                 # We'll need this for when we receive a pubkey reply:
                 # it will be encrypted and we'll need to decrypt it.
-                state.neededPubkeys[tag] = (
+                state.neededPubkeys[bytes(tag)] = (
                     toAddress,
                     highlevelcrypto.makeCryptor(
                         hexlify(privEncryptionKey))
@@ -99,18 +104,23 @@ class singleWorker(StoppableThread):
         for row in queryreturn:
             ackdata, = row
             self.logger.info('Watching for ackdata %s', hexlify(ackdata))
-            state.ackdataForWhichImWatching[ackdata] = 0
+            state.ackdataForWhichImWatching[bytes(ackdata)] = 0
 
         # Fix legacy (headerless) watched ackdata to include header
         for oldack in state.ackdataForWhichImWatching:
             if len(oldack) == 32:
                 # attach legacy header, always constant (msg/1/1)
-                newack = '\x00\x00\x00\x02\x01\x01' + oldack
-                state.ackdataForWhichImWatching[newack] = 0
-                sqlExecute(
+                newack = b'\x00\x00\x00\x02\x01\x01' + oldack
+                state.ackdataForWhichImWatching[bytes(newack)] = 0
+                rowcount = sqlExecute(
                     '''UPDATE sent SET ackdata=? WHERE ackdata=? AND folder = 'sent' ''',
-                    newack, oldack
+                    sqlite3.Binary(newack), sqlite3.Binary(oldack)
                 )
+                if rowcount < 1:
+                    sqlExecute(
+                        '''UPDATE sent SET ackdata=? WHERE ackdata=CAST(? AS TEXT) AND folder = 'sent' ''',
+                        sqlite3.Binary(newack), oldack
+                    )
                 del state.ackdataForWhichImWatching[oldack]
 
         # For the case if user deleted knownnodes
@@ -217,9 +227,8 @@ class singleWorker(StoppableThread):
         return privSigningKeyHex, privEncryptionKeyHex, \
             pubSigningKey, pubEncryptionKey
 
-    def _doPOWDefaults(self, payload, TTL,
-                       log_prefix='',
-                       log_time=False):
+    def _doPOWDefaults(
+            self, payload, TTL, log_prefix='', log_time=False):
         target = 2 ** 64 / (
             defaults.networkDefaultProofOfWorkNonceTrialsPerByte * (
                 len(payload) + 8
@@ -245,14 +254,16 @@ class singleWorker(StoppableThread):
                 'PoW took %.1f seconds, speed %s.',
                 delta, sizeof_fmt(nonce / delta)
             )
-        except:  # noqa:E722  # NameError
+        except NameError:
             self.logger.warning("Proof of Work exception")
         payload = pack('>Q', nonce) + payload
         return payload
 
     def doPOWForMyV2Pubkey(self, adressHash):
-        """ This function also broadcasts out the pubkey
-        message once it is done with the POW"""
+        """
+        This function also broadcasts out the pubkey message once it is
+        done with the POW
+        """
         # Look up my stream number based on my address hash
         myAddress = shared.myAddressesByHash[adressHash]
         addressVersionNumber, streamNumber = decodeAddress(myAddress)[1:3]
@@ -261,7 +272,7 @@ class singleWorker(StoppableThread):
         TTL = int(28 * 24 * 60 * 60 + helper_random.randomrandrange(-300, 300))
         embeddedTime = int(time.time() + TTL)
         payload = pack('>Q', (embeddedTime))
-        payload += '\x00\x00\x00\x01'  # object type: pubkey
+        payload += b'\x00\x00\x00\x01'  # object type: pubkey
         payload += encodeVarint(addressVersionNumber)  # Address version number
         payload += encodeVarint(streamNumber)
         # bitfield of features supported by me (see the wiki).
@@ -308,9 +319,10 @@ class singleWorker(StoppableThread):
 
     def sendOutOrStoreMyV3Pubkey(self, adressHash):
         """
-        If this isn't a chan address, this function assembles the pubkey data, does the necessary POW and sends it out.
-        If it *is* a chan then it assembles the pubkey and stores is in the pubkey table so that we can send messages
-        to "ourselves".
+        If this isn't a chan address, this function assembles the pubkey
+        data, does the necessary POW and sends it out.
+        If it *is* a chan then it assembles the pubkey and stores it in
+        the pubkey table so that we can send messages to "ourselves".
         """
         try:
             myAddress = shared.myAddressesByHash[adressHash]
@@ -338,7 +350,7 @@ class singleWorker(StoppableThread):
         # expiresTime time.
 
         payload = pack('>Q', (embeddedTime))
-        payload += '\x00\x00\x00\x01'  # object type: pubkey
+        payload += b'\x00\x00\x00\x01'  # object type: pubkey
         payload += encodeVarint(addressVersionNumber)  # Address version number
         payload += encodeVarint(streamNumber)
         # bitfield of features supported by me (see the wiki).
@@ -396,9 +408,10 @@ class singleWorker(StoppableThread):
 
     def sendOutOrStoreMyV4Pubkey(self, myAddress):
         """
-        It doesn't send directly anymore. It put is to a queue for another thread to send at an appropriate time,
-        whereas in the past it directly appended it to the outgoing buffer, I think. Same with all the other methods in
-        this class.
+        It doesn't send directly anymore. It put is to a queue for
+        another thread to send at an appropriate time, whereas in the
+        past it directly appended it to the outgoing buffer, I think.
+        Same with all the other methods in this class.
         """
         if not config.has_section(myAddress):
             # The address has been deleted.
@@ -413,7 +426,7 @@ class singleWorker(StoppableThread):
         TTL = int(28 * 24 * 60 * 60 + helper_random.randomrandrange(-300, 300))
         embeddedTime = int(time.time() + TTL)
         payload = pack('>Q', (embeddedTime))
-        payload += '\x00\x00\x00\x01'  # object type: pubkey
+        payload += b'\x00\x00\x00\x01'  # object type: pubkey
         payload += encodeVarint(addressVersionNumber)  # Address version number
         payload += encodeVarint(streamNumber)
         dataToEncrypt = protocol.getBitfield(myAddress)
@@ -515,9 +528,15 @@ class singleWorker(StoppableThread):
             payload, TTL, log_prefix='(For onionpeer object)')
 
         inventoryHash = highlevelcrypto.calculateInventoryHash(payload)
+        if six.PY2:
+            payload_buffer = buffer(payload)
+            tag_buffer = buffer(tag)
+        else:  # assume six.PY3
+            payload_buffer = memoryview(payload)
+            tag_buffer = memoryview(tag)
         state.Inventory[inventoryHash] = (
-            objectType, streamNumber, buffer(payload),  # noqa: F821
-            embeddedTime, buffer(tag)  # noqa: F821
+            objectType, streamNumber, payload_buffer,  # noqa: F821
+            embeddedTime, tag_buffer  # noqa: F821
         )
         self.logger.info(
             'sending inv (within sendOnionPeerObj function) for object: %s',
@@ -525,7 +544,10 @@ class singleWorker(StoppableThread):
         invQueue.put((streamNumber, inventoryHash))
 
     def sendBroadcast(self):
-        """Send a broadcast-type object (assemble the object, perform PoW and put it to the inv announcement queue)"""
+        """
+        Send a broadcast-type object (assemble the object, perform PoW
+        and put it to the inv announcement queue)
+        """
         # Reset just in case
         sqlExecute(
             '''UPDATE sent SET status='broadcastqueued' '''
@@ -534,10 +556,13 @@ class singleWorker(StoppableThread):
         queryreturn = sqlQuery(
             '''SELECT fromaddress, subject, message, '''
             ''' ackdata, ttl, encodingtype FROM sent '''
-            ''' WHERE status=? and folder='sent' ''', 'broadcastqueued')
+            ''' WHERE status=? and folder='sent' ''', dbstr('broadcastqueued'))
 
         for row in queryreturn:
             fromaddress, subject, body, ackdata, TTL, encoding = row
+            fromaddress = fromaddress.decode("utf-8", "replace")
+            subject = subject.decode("utf-8", "replace")
+            body = body.decode("utf-8", "replace")
             # status
             _, addressVersionNumber, streamNumber, ripe = \
                 decodeAddress(fromaddress)
@@ -556,8 +581,7 @@ class singleWorker(StoppableThread):
             except ValueError:
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
+                        ackdata, _translate(
                             "MainWindow",
                             "Error! Could not find sender address"
                             " (your address) in the keys.dat file."))
@@ -572,17 +596,24 @@ class singleWorker(StoppableThread):
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
                         ackdata,
-                        tr._translate(
+                        _translate(
                             "MainWindow",
                             "Error, can't send."))
                 ))
                 continue
 
-            if not sqlExecute(
+            rowcount = sqlExecute(
                     '''UPDATE sent SET status='doingbroadcastpow' '''
                     ''' WHERE ackdata=? AND status='broadcastqueued' '''
                     ''' AND folder='sent' ''',
-                    ackdata):
+                    sqlite3.Binary(ackdata))
+            if rowcount < 1:
+                rowcount = sqlExecute(
+                        '''UPDATE sent SET status='doingbroadcastpow' '''
+                        ''' WHERE ackdata=CAST(? AS TEXT) AND status='broadcastqueued' '''
+                        ''' AND folder='sent' ''',
+                        ackdata)
+            if rowcount < 1:
                 continue
 
             # At this time these pubkeys are 65 bytes long
@@ -599,7 +630,7 @@ class singleWorker(StoppableThread):
             TTL = int(TTL + helper_random.randomrandrange(-300, 300))
             embeddedTime = int(time.time() + TTL)
             payload = pack('>Q', embeddedTime)
-            payload += '\x00\x00\x00\x03'  # object type: broadcast
+            payload += b'\x00\x00\x00\x03'  # object type: broadcast
 
             if addressVersionNumber <= 3:
                 payload += encodeVarint(4)  # broadcast version
@@ -615,7 +646,7 @@ class singleWorker(StoppableThread):
                 tag = doubleHashOfAddressData[32:]
                 payload += tag
             else:
-                tag = ''
+                tag = b''
 
             dataToEncrypt = encodeVarint(addressVersionNumber)
             dataToEncrypt += encodeVarint(streamNumber)
@@ -661,8 +692,7 @@ class singleWorker(StoppableThread):
 
             queues.UISignalQueue.put((
                 'updateSentItemStatusByAckdata', (
-                    ackdata,
-                    tr._translate(
+                    ackdata, _translate(
                         "MainWindow",
                         "Doing work necessary to send broadcast..."))
             ))
@@ -694,23 +724,30 @@ class singleWorker(StoppableThread):
 
             queues.UISignalQueue.put((
                 'updateSentItemStatusByAckdata', (
-                    ackdata,
-                    tr._translate(
-                        "MainWindow",
-                        "Broadcast sent on %1"
-                    ).arg(l10n.formatTimestamp()))
+                    ackdata, _translate(
+                        "MainWindow", "Broadcast sent on {0}"
+                    ).format(l10n.formatTimestamp()))
             ))
 
             # Update the status of the message in the 'sent' table to have
             # a 'broadcastsent' status
-            sqlExecute(
+            rowcount = sqlExecute(
                 '''UPDATE sent SET msgid=?, status=?, lastactiontime=? '''
                 ''' WHERE ackdata=? AND folder='sent' ''',
-                inventoryHash, 'broadcastsent', int(time.time()), ackdata
+                sqlite3.Binary(inventoryHash), dbstr('broadcastsent'), int(time.time()), sqlite3.Binary(ackdata)
             )
+            if rowcount < 1:
+                sqlExecute(
+                    '''UPDATE sent SET msgid=?, status=?, lastactiontime=? '''
+                    ''' WHERE ackdata=CAST(? AS TEXT) AND folder='sent' ''',
+                    sqlite3.Binary(inventoryHash), 'broadcastsent', int(time.time()), ackdata
+                )
 
     def sendMsg(self):
-        """Send a message-type object (assemble the object, perform PoW and put it to the inv announcement queue)"""
+        """
+        Send a message-type object (assemble the object, perform PoW
+        and put it to the inv announcement queue)
+        """
         # pylint: disable=too-many-nested-blocks
         # Reset just in case
         sqlExecute(
@@ -726,6 +763,11 @@ class singleWorker(StoppableThread):
         for row in queryreturn:
             toaddress, fromaddress, subject, message, \
                 ackdata, status, TTL, retryNumber, encoding = row
+            toaddress = toaddress.decode("utf-8", "replace")
+            fromaddress = fromaddress.decode("utf-8", "replace")
+            subject = subject.decode("utf-8", "replace")
+            message = message.decode("utf-8", "replace")
+            status = status.decode("utf-8", "replace")
             # toStatus
             _, toAddressVersionNumber, toStreamNumber, toRipe = \
                 decodeAddress(toaddress)
@@ -755,7 +797,7 @@ class singleWorker(StoppableThread):
                 if not sqlExecute(
                     '''UPDATE sent SET status='doingmsgpow' '''
                     ''' WHERE toaddress=? AND status='msgqueued' AND folder='sent' ''',
-                    toaddress
+                    dbstr(toaddress)
                 ):
                     continue
                 status = 'doingmsgpow'
@@ -763,7 +805,7 @@ class singleWorker(StoppableThread):
                 # Let's see if we already have the pubkey in our pubkeys table
                 queryreturn = sqlQuery(
                     '''SELECT address FROM pubkeys WHERE address=?''',
-                    toaddress
+                    dbstr(toaddress)
                 )
                 # If we have the needed pubkey in the pubkey table already,
                 if queryreturn != []:
@@ -771,7 +813,7 @@ class singleWorker(StoppableThread):
                     if not sqlExecute(
                         '''UPDATE sent SET status='doingmsgpow' '''
                         ''' WHERE toaddress=? AND status='msgqueued' AND folder='sent' ''',
-                        toaddress
+                        dbstr(toaddress)
                     ):
                         continue
                     status = 'doingmsgpow'
@@ -783,31 +825,31 @@ class singleWorker(StoppableThread):
                     sqlExecute(
                         '''UPDATE pubkeys SET usedpersonally='yes' '''
                         ''' WHERE address=?''',
-                        toaddress
+                        dbstr(toaddress)
                     )
                 # We don't have the needed pubkey in the pubkeys table already.
                 else:
                     if toAddressVersionNumber <= 3:
-                        toTag = ''
+                        toTag = b''
                     else:
                         toTag = highlevelcrypto.double_sha512(
                             encodeVarint(toAddressVersionNumber)
                             + encodeVarint(toStreamNumber) + toRipe
                         )[32:]
+                    toTag_bytes = bytes(toTag)
                     if toaddress in state.neededPubkeys or \
-                            toTag in state.neededPubkeys:
+                            toTag_bytes in state.neededPubkeys:
                         # We already sent a request for the pubkey
                         sqlExecute(
                             '''UPDATE sent SET status='awaitingpubkey', '''
                             ''' sleeptill=? WHERE toaddress=? '''
                             ''' AND status='msgqueued' ''',
                             int(time.time()) + 2.5 * 24 * 60 * 60,
-                            toaddress
+                            dbstr(toaddress)
                         )
                         queues.UISignalQueue.put((
                             'updateSentItemStatusByToAddress', (
-                                toaddress,
-                                tr._translate(
+                                toaddress, _translate(
                                     "MainWindow",
                                     "Encryption key was requested earlier."))
                         ))
@@ -836,7 +878,8 @@ class singleWorker(StoppableThread):
                             privEncryptionKey = doubleHashOfToAddressData[:32]
                             # The second half of the sha512 hash.
                             tag = doubleHashOfToAddressData[32:]
-                            state.neededPubkeys[tag] = (
+                            tag_bytes = bytes(tag)
+                            state.neededPubkeys[tag_bytes] = (
                                 toaddress,
                                 highlevelcrypto.makeCryptor(
                                     hexlify(privEncryptionKey))
@@ -858,8 +901,8 @@ class singleWorker(StoppableThread):
                                         ''' status='awaitingpubkey' or '''
                                         ''' status='doingpubkeypow') AND '''
                                         ''' folder='sent' ''',
-                                        toaddress)
-                                    del state.neededPubkeys[tag]
+                                        dbstr(toaddress))
+                                    del state.neededPubkeys[tag_bytes]
                                     break
                                 # else:
                                 # There was something wrong with this
@@ -875,12 +918,11 @@ class singleWorker(StoppableThread):
                                 '''UPDATE sent SET '''
                                 ''' status='doingpubkeypow' WHERE '''
                                 ''' toaddress=? AND status='msgqueued' AND folder='sent' ''',
-                                toaddress
+                                dbstr(toaddress)
                             )
                             queues.UISignalQueue.put((
                                 'updateSentItemStatusByToAddress', (
-                                    toaddress,
-                                    tr._translate(
+                                    toaddress, _translate(
                                         "MainWindow",
                                         "Sending a request for the"
                                         " recipient\'s encryption key."))
@@ -901,11 +943,10 @@ class singleWorker(StoppableThread):
 
             # if we aren't sending this to ourselves or a chan
             if not config.has_section(toaddress):
-                state.ackdataForWhichImWatching[ackdata] = 0
+                state.ackdataForWhichImWatching[bytes(ackdata)] = 0
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
+                        ackdata, _translate(
                             "MainWindow",
                             "Looking up the receiver\'s public key"))
                 ))
@@ -920,7 +961,7 @@ class singleWorker(StoppableThread):
                 # is too hard then we'll abort.
                 queryreturn = sqlQuery(
                     'SELECT transmitdata FROM pubkeys WHERE address=?',
-                    toaddress)
+                    dbstr(toaddress))
                 for row in queryreturn:  # pylint: disable=redefined-outer-name
                     pubkeyPayload, = row
 
@@ -962,15 +1003,14 @@ class singleWorker(StoppableThread):
                         )
                         queues.UISignalQueue.put((
                             'updateSentItemStatusByAckdata', (
-                                ackdata,
-                                tr._translate(
+                                ackdata, _translate(
                                     "MainWindow",
                                     "Problem: Destination is a mobile"
                                     " device who requests that the"
                                     " destination be included in the"
                                     " message but this is disallowed in"
-                                    " your settings.  %1"
-                                ).arg(l10n.formatTimestamp()))
+                                    " your settings.  {0}"
+                                ).format(l10n.formatTimestamp()))
                         ))
                         # if the human changes their setting and then
                         # sends another message or restarts their client,
@@ -993,8 +1033,7 @@ class singleWorker(StoppableThread):
                         defaults.networkDefaultPayloadLengthExtraBytes
                     queues.UISignalQueue.put((
                         'updateSentItemStatusByAckdata', (
-                            ackdata,
-                            tr._translate(
+                            ackdata, _translate(
                                 "MainWindow",
                                 "Doing work necessary to send message.\n"
                                 "There is no required difficulty for"
@@ -1026,32 +1065,19 @@ class singleWorker(StoppableThread):
                         requiredAverageProofOfWorkNonceTrialsPerByte,
                         requiredPayloadLengthExtraBytes
                     )
-
-                    queues.UISignalQueue.put(
-                        (
-                            'updateSentItemStatusByAckdata',
-                            (
-                                ackdata,
-                                tr._translate(
-                                    "MainWindow",
-                                    "Doing work necessary to send message.\n"
-                                    "Receiver\'s required difficulty: %1"
-                                    " and %2"
-                                ).arg(
-                                    str(
-                                        float(requiredAverageProofOfWorkNonceTrialsPerByte)
-                                        / defaults.networkDefaultProofOfWorkNonceTrialsPerByte
-                                    )
-                                ).arg(
-                                    str(
-                                        float(requiredPayloadLengthExtraBytes)
-                                        / defaults.networkDefaultPayloadLengthExtraBytes
-                                    )
-                                )
-                            )
-                        )
-                    )
-
+                    queues.UISignalQueue.put((
+                        'updateSentItemStatusByAckdata', (
+                            ackdata, _translate(
+                                "MainWindow",
+                                "Doing work necessary to send message.\n"
+                                "Receiver\'s required difficulty: {0} and {1}"
+                            ).format(
+                                float(requiredAverageProofOfWorkNonceTrialsPerByte)
+                                / defaults.networkDefaultProofOfWorkNonceTrialsPerByte,
+                                float(requiredPayloadLengthExtraBytes)
+                                / defaults.networkDefaultPayloadLengthExtraBytes
+                            ))
+                    ))
                     if status != 'forcepow':
                         maxacceptablenoncetrialsperbyte = config.getint(
                             'bitmessagesettings', 'maxacceptablenoncetrialsperbyte')
@@ -1065,24 +1091,30 @@ class singleWorker(StoppableThread):
                         if cond1 or cond2:
                             # The demanded difficulty is more than
                             # we are willing to do.
-                            sqlExecute(
+                            rowcount = sqlExecute(
                                 '''UPDATE sent SET status='toodifficult' '''
                                 ''' WHERE ackdata=? AND folder='sent' ''',
-                                ackdata)
+                                sqlite3.Binary(ackdata))
+                            if rowcount < 1:
+                                sqlExecute(
+                                    '''UPDATE sent SET status='toodifficult' '''
+                                    ''' WHERE ackdata=CAST(? AS TEXT) AND folder='sent' ''',
+                                    ackdata)
                             queues.UISignalQueue.put((
                                 'updateSentItemStatusByAckdata', (
-                                    ackdata,
-                                    tr._translate(
+                                    ackdata, _translate(
                                         "MainWindow",
-                                        "Problem: The work demanded by"
-                                        " the recipient (%1 and %2) is"
-                                        " more difficult than you are"
-                                        " willing to do. %3"
-                                    ).arg(str(float(requiredAverageProofOfWorkNonceTrialsPerByte)
-                                          / defaults.networkDefaultProofOfWorkNonceTrialsPerByte)
-                                          ).arg(str(float(requiredPayloadLengthExtraBytes)
-                                                / defaults.networkDefaultPayloadLengthExtraBytes)
-                                                ).arg(l10n.formatTimestamp()))))
+                                        "Problem: The work demanded by the"
+                                        " recipient ({0} and {1}) is more"
+                                        " difficult than you are willing"
+                                        " to do. {2}"
+                                    ).format(
+                                        float(requiredAverageProofOfWorkNonceTrialsPerByte)
+                                        / defaults.networkDefaultProofOfWorkNonceTrialsPerByte,
+                                        float(requiredPayloadLengthExtraBytes)
+                                        / defaults.networkDefaultPayloadLengthExtraBytes,
+                                        l10n.formatTimestamp()))
+                            ))
                             continue
             else:  # if we are sending a message to ourselves or a chan..
                 self.logger.info('Sending a message.')
@@ -1096,15 +1128,14 @@ class singleWorker(StoppableThread):
                 except (configparser.NoSectionError, configparser.NoOptionError) as err:
                     queues.UISignalQueue.put((
                         'updateSentItemStatusByAckdata', (
-                            ackdata,
-                            tr._translate(
+                            ackdata, _translate(
                                 "MainWindow",
                                 "Problem: You are trying to send a"
                                 " message to yourself or a chan but your"
                                 " encryption key could not be found in"
                                 " the keys.dat file. Could not encrypt"
-                                " message. %1"
-                            ).arg(l10n.formatTimestamp()))
+                                " message. {0}"
+                            ).format(l10n.formatTimestamp()))
                     ))
                     self.logger.error(
                         'Error within sendMsg. Could not read the keys'
@@ -1122,8 +1153,7 @@ class singleWorker(StoppableThread):
                     defaults.networkDefaultPayloadLengthExtraBytes
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
+                        ackdata, _translate(
                             "MainWindow",
                             "Doing work necessary to send message."))
                 ))
@@ -1145,8 +1175,7 @@ class singleWorker(StoppableThread):
             except ValueError:
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
+                        ackdata, _translate(
                             "MainWindow",
                             "Error! Could not find sender address"
                             " (your address) in the keys.dat file."))
@@ -1161,7 +1190,7 @@ class singleWorker(StoppableThread):
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
                         ackdata,
-                        tr._translate(
+                        _translate(
                             "MainWindow",
                             "Error, can't send."))
                 ))
@@ -1201,23 +1230,22 @@ class singleWorker(StoppableThread):
                     'Not bothering to include ackdata because we are'
                     ' sending to ourselves or a chan.'
                 )
-                fullAckPayload = ''
+                fullAckPayload = b''
             elif not protocol.checkBitfield(
                     behaviorBitfield, protocol.BITFIELD_DOESACK):
                 self.logger.info(
                     'Not bothering to include ackdata because'
                     ' the receiver said that they won\'t relay it anyway.'
                 )
-                fullAckPayload = ''
+                fullAckPayload = b''
             else:
                 # The fullAckPayload is a normal msg protocol message
                 # with the proof of work already completed that the
                 # receiver of this message can easily send out.
-                fullAckPayload = self.generateFullAckMessage(
-                    ackdata, toStreamNumber, TTL)
+                fullAckPayload = self.generateFullAckMessage(ackdata, TTL)
             payload += encodeVarint(len(fullAckPayload))
             payload += fullAckPayload
-            dataToSign = pack('>Q', embeddedTime) + '\x00\x00\x00\x02' + \
+            dataToSign = pack('>Q', embeddedTime) + b'\x00\x00\x00\x02' + \
                 encodeVarint(1) + encodeVarint(toStreamNumber) + payload
             signature = highlevelcrypto.sign(
                 dataToSign, privSigningKeyHex, self.digestAlg)
@@ -1227,27 +1255,31 @@ class singleWorker(StoppableThread):
             # We have assembled the data that will be encrypted.
             try:
                 encrypted = highlevelcrypto.encrypt(
-                    payload, "04" + hexlify(pubEncryptionKeyBase256)
+                    payload, b"04" + hexlify(pubEncryptionKeyBase256)
                 )
             except:  # noqa:E722
                 self.logger.warning("highlevelcrypto.encrypt didn't work")
-                sqlExecute(
+                rowcount = sqlExecute(
                     '''UPDATE sent SET status='badkey' WHERE ackdata=? AND folder='sent' ''',
-                    ackdata
+                    sqlite3.Binary(ackdata)
                 )
+                if rowcount < 1:
+                    sqlExecute(
+                        '''UPDATE sent SET status='badkey' WHERE ackdata=CAST(? AS TEXT) AND folder='sent' ''',
+                        ackdata
+                    )
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
+                        ackdata, _translate(
                             "MainWindow",
                             "Problem: The recipient\'s encryption key is"
-                            " no good. Could not encrypt message. %1"
-                        ).arg(l10n.formatTimestamp()))
+                            " no good. Could not encrypt message. {0}"
+                        ).format(l10n.formatTimestamp()))
                 ))
                 continue
 
             encryptedPayload = pack('>Q', embeddedTime)
-            encryptedPayload += '\x00\x00\x00\x02'  # object type: msg
+            encryptedPayload += b'\x00\x00\x00\x02'  # object type: msg
             encryptedPayload += encodeVarint(1)  # msg version
             encryptedPayload += encodeVarint(toStreamNumber) + encrypted
             target = 2 ** 64 / (
@@ -1306,21 +1338,19 @@ class singleWorker(StoppableThread):
                not protocol.checkBitfield(behaviorBitfield, protocol.BITFIELD_DOESACK):
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
-                            "MainWindow",
-                            "Message sent. Sent at %1"
-                        ).arg(l10n.formatTimestamp()))))
+                        ackdata, _translate(
+                            "MainWindow", "Message sent. Sent at {0}"
+                        ).format(l10n.formatTimestamp()))
+                ))
             else:
                 # not sending to a chan or one of my addresses
                 queues.UISignalQueue.put((
                     'updateSentItemStatusByAckdata', (
-                        ackdata,
-                        tr._translate(
+                        ackdata, _translate(
                             "MainWindow",
                             "Message sent. Waiting for acknowledgement."
-                            " Sent on %1"
-                        ).arg(l10n.formatTimestamp()))
+                            " Sent on {0}"
+                        ).format(l10n.formatTimestamp()))
                 ))
             self.logger.info(
                 'Broadcasting inv for my msg(within sendmsg function): %s',
@@ -1337,12 +1367,19 @@ class singleWorker(StoppableThread):
                 newStatus = 'msgsent'
             # wait 10% past expiration
             sleepTill = int(time.time() + TTL * 1.1)
-            sqlExecute(
+            rowcount = sqlExecute(
                 '''UPDATE sent SET msgid=?, status=?, retrynumber=?, '''
                 ''' sleeptill=?, lastactiontime=? WHERE ackdata=? AND folder='sent' ''',
-                inventoryHash, newStatus, retryNumber + 1,
-                sleepTill, int(time.time()), ackdata
+                sqlite3.Binary(inventoryHash), dbstr(newStatus), retryNumber + 1,
+                sleepTill, int(time.time()), sqlite3.Binary(ackdata)
             )
+            if rowcount < 1:
+                sqlExecute(
+                    '''UPDATE sent SET msgid=?, status=?, retrynumber=?, '''
+                    ''' sleeptill=?, lastactiontime=? WHERE ackdata=CAST(? AS TEXT) AND folder='sent' ''',
+                    sqlite3.Binary(inventoryHash), newStatus, retryNumber + 1,
+                    sleepTill, int(time.time()), ackdata
+                )
 
             # If we are sending to ourselves or a chan, let's put
             # the message in our own inbox.
@@ -1386,7 +1423,7 @@ class singleWorker(StoppableThread):
             '''SELECT retrynumber FROM sent WHERE toaddress=? '''
             ''' AND (status='doingpubkeypow' OR status='awaitingpubkey') '''
             ''' AND folder='sent' LIMIT 1''',
-            toAddress
+            dbstr(toAddress)
         )
         if not queryReturn:
             self.logger.critical(
@@ -1412,10 +1449,11 @@ class singleWorker(StoppableThread):
             privEncryptionKey = doubleHashOfAddressData[:32]
             # Note that this is the second half of the sha512 hash.
             tag = doubleHashOfAddressData[32:]
-            if tag not in state.neededPubkeys:
+            tag_bytes = bytes(tag)
+            if tag_bytes not in state.neededPubkeys:
                 # We'll need this for when we receive a pubkey reply:
                 # it will be encrypted and we'll need to decrypt it.
-                state.neededPubkeys[tag] = (
+                state.neededPubkeys[tag_bytes] = (
                     toAddress,
                     highlevelcrypto.makeCryptor(hexlify(privEncryptionKey))
                 )
@@ -1429,7 +1467,7 @@ class singleWorker(StoppableThread):
         TTL = TTL + helper_random.randomrandrange(-300, 300)
         embeddedTime = int(time.time() + TTL)
         payload = pack('>Q', embeddedTime)
-        payload += '\x00\x00\x00\x00'  # object type: getpubkey
+        payload += b'\x00\x00\x00\x00'  # object type: getpubkey
         payload += encodeVarint(addressVersionNumber)
         payload += encodeVarint(streamNumber)
         if addressVersionNumber <= 3:
@@ -1446,8 +1484,7 @@ class singleWorker(StoppableThread):
         queues.UISignalQueue.put(('updateStatusBar', statusbar))
         queues.UISignalQueue.put((
             'updateSentItemStatusByToAddress', (
-                toAddress,
-                tr._translate(
+                toAddress, _translate(
                     "MainWindow",
                     "Doing work necessary to request encryption key."))
         ))
@@ -1468,33 +1505,34 @@ class singleWorker(StoppableThread):
             ''' status='awaitingpubkey', retrynumber=?, sleeptill=? '''
             ''' WHERE toaddress=? AND (status='doingpubkeypow' OR '''
             ''' status='awaitingpubkey') AND folder='sent' ''',
-            int(time.time()), retryNumber + 1, sleeptill, toAddress)
+            int(time.time()), retryNumber + 1, sleeptill, dbstr(toAddress))
 
         queues.UISignalQueue.put((
-            'updateStatusBar',
-            tr._translate(
+            'updateStatusBar', _translate(
                 "MainWindow",
                 "Broadcasting the public key request. This program will"
                 " auto-retry if they are offline.")
         ))
         queues.UISignalQueue.put((
             'updateSentItemStatusByToAddress', (
-                toAddress,
-                tr._translate(
+                toAddress, _translate(
                     "MainWindow",
                     "Sending public key request. Waiting for reply."
-                    " Requested at %1"
-                ).arg(l10n.formatTimestamp()))
+                    " Requested at {0}"
+                ).format(l10n.formatTimestamp()))
         ))
 
-    def generateFullAckMessage(self, ackdata, _, TTL):
-        """
-        It might be perfectly fine to just use the same TTL for the ackdata that we use for the message. But I would
-        rather it be more difficult for attackers to associate ackData with the associated msg object. However, users
-        would want the TTL of the acknowledgement to be about the same as they set for the message itself. So let's set
-        the TTL of the acknowledgement to be in one of three 'buckets': 1 hour, 7 days, or 28 days, whichever is
-        relatively close to what the user specified.
-        """
+    def generateFullAckMessage(self, ackdata, TTL):
+        """Create ACK packet"""
+        # It might be perfectly fine to just use the same TTL for
+        # the ackdata that we use for the message. But I would rather
+        # it be more difficult for attackers to associate ackData with
+        # the associated msg object. However, users would want the TTL
+        # of the acknowledgement to be about the same as they set
+        # for the message itself. So let's set the TTL of the
+        # acknowledgement to be in one of three 'buckets': 1 hour, 7
+        # days, or 28 days, whichever is relatively close to what the
+        # user specified.
         if TTL < 24 * 60 * 60:  # 1 day
             TTL = 24 * 60 * 60  # 1 day
         elif TTL < 7 * 24 * 60 * 60:  # 1 week
@@ -1511,4 +1549,4 @@ class singleWorker(StoppableThread):
         payload = self._doPOWDefaults(
             payload, TTL, log_prefix='(For ack message)', log_time=True)
 
-        return protocol.CreatePacket('object', payload)
+        return protocol.CreatePacket(b'object', payload)

src/class_smtpDeliver.py

@@ -4,9 +4,9 @@ SMTP client thread for delivering emails
 # pylint: disable=unused-variable
 
 import smtplib
-import urlparse
+from six.moves.urllib import parse as urlparse
 from email.header import Header
-from email.mime.text import MIMEText
+from six.moves import email_mime_text
 
 import queues
 import state
@@ -55,7 +55,7 @@ class smtpDeliver(StoppableThread):
                     u = urlparse.urlparse(dest)
                     to = urlparse.parse_qs(u.query)['to']
                     client = smtplib.SMTP(u.hostname, u.port)
-                    msg = MIMEText(body, 'plain', 'utf-8')
+                    msg = email_mime_text(body, 'plain', 'utf-8')
                     msg['Subject'] = Header(subject, 'utf-8')
                     msg['From'] = fromAddress + '@' + SMTPDOMAIN
                     toLabel = map(

src/class_smtpServer.py

@@ -12,6 +12,7 @@ import threading
 import time
 from email.header import decode_header
 from email.parser import Parser
+import sqlite3
 
 import queues
 from addresses import decodeAddress
@@ -20,6 +21,7 @@ from helper_ackPayload import genAckPayload
 from helper_sql import sqlExecute
 from network.threads import StoppableThread
 from version import softwareVersion
+from dbcompat import dbstr
 
 SMTPDOMAIN = "bmaddr.lan"
 LISTENPORT = 8425
@@ -88,19 +90,19 @@ class smtpServerPyBitmessage(smtpd.SMTPServer):
         ackdata = genAckPayload(streamNumber, stealthLevel)
         sqlExecute(
             '''INSERT INTO sent VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)''',
-            '',
-            toAddress,
-            ripe,
-            fromAddress,
-            subject,
-            message,
-            ackdata,
+            sqlite3.Binary(b''),
+            dbstr(toAddress),
+            sqlite3.Binary(ripe),
+            dbstr(fromAddress),
+            dbstr(subject),
+            dbstr(message),
+            sqlite3.Binary(ackdata),
             int(time.time()),  # sentTime (this will never change)
             int(time.time()),  # lastActionTime
             0,  # sleepTill time. This will get set when the POW gets done.
-            'msgqueued',
+            dbstr('msgqueued'),
             0,  # retryNumber
-            'sent',  # folder
+            dbstr('sent'),  # folder
             2,  # encodingtype
             # not necessary to have a TTL higher than 2 days
             min(config.getint('bitmessagesettings', 'ttl'), 86400 * 2)

src/class_sqlThread.py

@@ -8,6 +8,7 @@ import sqlite3
 import sys
 import threading
 import time
+from six.moves.reprlib import repr
 
 try:
     import helper_sql
@@ -38,7 +39,7 @@ class sqlThread(threading.Thread):
         helper_sql.sql_available = True
         config_ready.wait()
         self.conn = sqlite3.connect(state.appdata + 'messages.dat')
-        self.conn.text_factory = str
+        self.conn.text_factory = bytes
         self.cur = self.conn.cursor()
 
         self.cur.execute('PRAGMA secure_delete = true')
@@ -73,7 +74,7 @@ class sqlThread(threading.Thread):
                 '''INSERT INTO subscriptions VALUES'''
                 '''('Bitmessage new releases/announcements','BM-GtovgYdgs7qXPkoYaRgrLFuFKz1SFpsw',1)''')
             self.cur.execute(
-                '''CREATE TABLE settings (key blob, value blob, UNIQUE(key) ON CONFLICT REPLACE)''')
+                '''CREATE TABLE settings (key text, value blob, UNIQUE(key) ON CONFLICT REPLACE)''')
             self.cur.execute('''INSERT INTO settings VALUES('version','11')''')
             self.cur.execute('''INSERT INTO settings VALUES('lastvacuumtime',?)''', (
                 int(time.time()),))
@@ -542,7 +543,7 @@ class sqlThread(threading.Thread):
                 shutil.move(
                     paths.lookupAppdataFolder() + 'messages.dat', paths.lookupExeFolder() + 'messages.dat')
                 self.conn = sqlite3.connect(paths.lookupExeFolder() + 'messages.dat')
-                self.conn.text_factory = str
+                self.conn.text_factory = bytes
                 self.cur = self.conn.cursor()
             elif item == 'movemessagstoappdata':
                 logger.debug('the sqlThread is moving the messages.dat file to the Appdata folder.')
@@ -568,7 +569,7 @@ class sqlThread(threading.Thread):
                 shutil.move(
                     paths.lookupExeFolder() + 'messages.dat', paths.lookupAppdataFolder() + 'messages.dat')
                 self.conn = sqlite3.connect(paths.lookupAppdataFolder() + 'messages.dat')
-                self.conn.text_factory = str
+                self.conn.text_factory = bytes
                 self.cur = self.conn.cursor()
             elif item == 'deleteandvacuume':
                 self.cur.execute('''delete from inbox where folder='trash' ''')

src/dbcompat.py

@@ -0,0 +1,22 @@
+import logging
+import six
+
+logger = logging.getLogger("default")
+
+def dbstr(v):
+    if six.PY3:
+        if isinstance(v, str):
+            return v
+        elif isinstance(v, bytes):
+            return v.decode("utf-8", "replace")
+        logger.debug("unexpected type in dbstr(): {}".format(type(v)))
+        return v  # hope this never happens..
+    else:  # assume six.PY2
+        if isinstance(v, unicode):
+            return v.encode("utf-8", "replace")
+        elif isinstance(v, str):
+            return v
+        elif isinstance(v, bytes):
+            return str(v)
+        logger.debug("unexpected type in dbstr(): {}".format(type(v)))
+        return v  # hope this never happens..

src/depends.py

@@ -6,6 +6,7 @@ and suggest how it may be installed
 import os
 import re
 import sys
+import six
 
 # Only really old versions of Python don't have sys.hexversion. We don't
 # support them. The logging module was introduced in Python 2.3
@@ -17,6 +18,7 @@ if not hasattr(sys, 'hexversion') or sys.hexversion < 0x20300F0:
     )
 
 import logging  # noqa:E402
+from distutils import version
 import subprocess  # nosec B404
 
 from importlib import import_module
@@ -53,23 +55,23 @@ PACKAGE_MANAGER = {
 }
 
 PACKAGES = {
-    "PyQt4": {
-        "OpenBSD": "py-qt4",
-        "FreeBSD": "py27-qt4",
-        "Debian": "python-qt4",
-        "Ubuntu": "python-qt4",
-        "Ubuntu 12": "python-qt4",
-        "Ubuntu 20": "",
-        "openSUSE": "python-qt",
-        "Fedora": "PyQt4",
-        "Guix": "python2-pyqt@4.11.4",
-        "Gentoo": "dev-python/PyQt4",
+    "qtpy": {
+        "OpenBSD": "py-qtpy",
+        "FreeBSD": "py27-QtPy",
+        "Debian": "python-qtpy",
+        "Ubuntu": "python-qtpy",
+        "Ubuntu 12": "python-qtpy",
+        "Ubuntu 20": "python-qtpy",
+        "openSUSE": "python-QtPy",
+        "Fedora": "python2-QtPy",
+        "Guix": "",
+        "Gentoo": "dev-python/QtPy",
         "optional": True,
         "description":
-        "You only need PyQt if you want to use the GUI."
+        "You only need qtpy if you want to use the GUI."
         " When only running as a daemon, this can be skipped.\n"
-        "However, you would have to install it manually"
-        " because setuptools does not support PyQt."
+        "Also maybe you need to install PyQt5 or PyQt4"
+        " if your package manager not installs it as qtpy dependency"
     },
     "msgpack": {
         "OpenBSD": "py-msgpack",
@@ -156,19 +158,19 @@ detectOS.result = None
 def detectOSRelease():
     """Detecting the release of OS"""
     with open("/etc/os-release", 'r') as osRelease:
-        version = None
+        ver = None
         for line in osRelease:
             if line.startswith("NAME="):
                 detectOS.result = OS_RELEASE.get(
                     line.replace('"', '').split("=")[-1].strip().lower())
             elif line.startswith("VERSION_ID="):
                 try:
-                    version = float(line.split("=")[1].replace("\"", ""))
+                    ver = float(line.split("=")[1].replace("\"", ""))
                 except ValueError:
                     pass
-        if detectOS.result == "Ubuntu" and version < 14:
+        if detectOS.result == "Ubuntu" and ver < 14:
             detectOS.result = "Ubuntu 12"
-        elif detectOS.result == "Ubuntu" and version >= 20:
+        elif detectOS.result == "Ubuntu" and ver >= 20:
             detectOS.result = "Ubuntu 20"
 
 
@@ -191,7 +193,7 @@ def try_import(module, log_extra=False):
 def check_ripemd160():
     """Check availability of the RIPEMD160 hash function"""
     try:
-        from fallback import RIPEMD160Hash  # pylint: disable=relative-import
+        from fallback import RIPEMD160Hash
     except ImportError:
         return False
     return RIPEMD160Hash is not None
@@ -380,33 +382,71 @@ def check_curses():
 def check_pyqt():
     """Do pyqt dependency check.
 
-    Here we are checking for PyQt4 with its version, as for it require
-    PyQt 4.8 or later.
+    Here we are checking for qtpy with its version, as for it require
+    qtpy.
     """
+    # pylint: disable=no-member
+    try:
+        import qtpy
+    except ImportError:
+        logger.error(
+            'PyBitmessage requires qtpy, and PyQt5 or PyQt4, '
+            ' PyQt 4.8 or later and Qt 4.7 or later.')
+        return False
+
+    sip_found = False
+    try:
+        import sip
+        sip.setapi("QString", 2)
+        sip.setapi("QVariant", 2)
+        sip_found = True
+    except ImportError:
+        pass
+
     QtCore = try_import(
-        'PyQt4.QtCore', 'PyBitmessage requires PyQt 4.8 or later and Qt 4.7 or later.')
+        'qtpy.QtCore', 'PyBitmessage requires qtpy and Qt 4.7 or later.')
 
     if not QtCore:
         return False
 
-    logger.info('PyQt Version: %s', QtCore.PYQT_VERSION_STR)
-    logger.info('Qt Version: %s', QtCore.QT_VERSION_STR)
+    try:
+        logger.info('PyQt Version: %s', QtCore.PYQT_VERSION_STR)
+    except AttributeError:
+        logger.info('Can be PySide..')
+    try:
+        logger.info('Qt Version: %s', QtCore.__version__)
+    except AttributeError:
+        # Can be PySide..
+        pass
     passed = True
-    if QtCore.PYQT_VERSION < 0x40800:
-        logger.error(
-            'This version of PyQt is too old. PyBitmessage requries'
-            ' PyQt 4.8 or later.')
-        passed = False
-    if QtCore.QT_VERSION < 0x40700:
-        logger.error(
-            'This version of Qt is too old. PyBitmessage requries'
-            ' Qt 4.7 or later.')
-        passed = False
+
+    try:
+        if version.LooseVersion(QtCore.PYQT_VERSION_STR) < '4.8':
+            logger.error(
+                'This version of PyQt is too old. PyBitmessage requries'
+                ' PyQt 4.8 or later.')
+            passed = False
+    except AttributeError:
+        # Can be PySide..
+        pass
+    try:
+        if version.LooseVersion(QtCore.__version__) < '4.7':
+            logger.error(
+                'This version of Qt is too old. PyBitmessage requries'
+                ' Qt 4.7 or later.')
+            passed = False
+    except AttributeError:
+        # Can be PySide..
+        pass
+
+    if passed and not sip_found:
+        logger.info("sip is not found although PyQt is found")
+        return False
+
     return passed
 
-
 def check_msgpack():
-    """Do sgpack module check.
+    """Do msgpack module check.
 
     simply checking if msgpack package with all its dependency
     is available or not as recommended for messages coding.
@@ -435,14 +475,9 @@ def check_dependencies(verbose=False, optional=False):
     logger.info('Python version: %s', sys.version)
     if sys.hexversion < 0x20704F0:
         logger.error(
-            'PyBitmessage requires Python 2.7.4 or greater'
-            ' (but not Python 3+)')
+            'PyBitmessage requires Python 2.7.4 or greater.'
+            ' Python 2.7.18 is recommended.')
         has_all_dependencies = False
-    if sys.hexversion >= 0x3000000:
-        logger.error(
-            'PyBitmessage does not support Python 3+. Python 2.7.4'
-            ' or greater is required. Python 2.7.18 is recommended.')
-        sys.exit()
 
     # FIXME: This needs to be uncommented when more of the code is python3 compatible
     # if sys.hexversion >= 0x3000000 and sys.hexversion < 0x3060000:

src/fallback/umsgpack/umsgpack.py

@@ -49,10 +49,12 @@ License: MIT
 # pylint: disable=too-many-lines,too-many-branches,too-many-statements,global-statement,too-many-return-statements
 # pylint: disable=unused-argument
 
-import collections
-import io
+from collections import OrderedDict
+from six.moves.collections_abc import Hashable
+from six.moves import range as xrange
 import struct
 import sys
+import six
 
 __version__ = "2.4.1"
 "Module version string"
@@ -99,9 +101,9 @@ class Ext:  # pylint: disable=old-style-class
         if not isinstance(type, int) or not (type >= 0 and type <= 127):
             raise TypeError("ext type out of range")
         # Check data is type bytes
-        elif sys.version_info[0] == 3 and not isinstance(data, bytes):
+        elif six.PY3 and not isinstance(data, bytes):
             raise TypeError("ext data is not type \'bytes\'")
-        elif sys.version_info[0] == 2 and not isinstance(data, str):
+        elif six.PY2 and not isinstance(data, str):
             raise TypeError("ext data is not type \'str\'")
         self.type = type
         self.data = data
@@ -125,7 +127,7 @@ class Ext:  # pylint: disable=old-style-class
         String representation of this Ext object.
         """
         s = "Ext Object (Type: 0x%02x, Data: " % self.type
-        s += " ".join(["0x%02x" % ord(self.data[i:i + 1])
+        s += " ".join(["0x%02x" % six.byte2int(self.data[i:i + 1])
                        for i in xrange(min(len(self.data), 8))])
         if len(self.data) > 8:
             s += " ..."
@@ -549,7 +551,7 @@ def _packb2(obj, **options):
     '\x82\xa7compact\xc3\xa6schema\x00'
     >>>
     """
-    fp = io.BytesIO()
+    fp = six.BytesIO()
     _pack2(obj, fp, **options)
     return fp.getvalue()
 
@@ -582,7 +584,7 @@ def _packb3(obj, **options):
     b'\x82\xa7compact\xc3\xa6schema\x00'
     >>>
     """
-    fp = io.BytesIO()
+    fp = six.BytesIO()
     _pack3(obj, fp, **options)
     return fp.getvalue()
 
@@ -599,7 +601,7 @@ def _read_except(fp, n):
 
 
 def _unpack_integer(code, fp, options):
-    if (ord(code) & 0xe0) == 0xe0:
+    if (six.byte2int(code) & 0xe0) == 0xe0:
         return struct.unpack("b", code)[0]
     elif code == b'\xd0':
         return struct.unpack("b", _read_except(fp, 1))[0]
@@ -609,7 +611,7 @@ def _unpack_integer(code, fp, options):
         return struct.unpack(">i", _read_except(fp, 4))[0]
     elif code == b'\xd3':
         return struct.unpack(">q", _read_except(fp, 8))[0]
-    elif (ord(code) & 0x80) == 0x00:
+    elif (six.byte2int(code) & 0x80) == 0x00:
         return struct.unpack("B", code)[0]
     elif code == b'\xcc':
         return struct.unpack("B", _read_except(fp, 1))[0]
@@ -619,21 +621,21 @@ def _unpack_integer(code, fp, options):
         return struct.unpack(">I", _read_except(fp, 4))[0]
     elif code == b'\xcf':
         return struct.unpack(">Q", _read_except(fp, 8))[0]
-    raise Exception("logic error, not int: 0x%02x" % ord(code))
+    raise Exception("logic error, not int: 0x%02x" % six.byte2int(code))
 
 
 def _unpack_reserved(code, fp, options):
     if code == b'\xc1':
         raise ReservedCodeException(
-            "encountered reserved code: 0x%02x" % ord(code))
+            "encountered reserved code: 0x%02x" % six.byte2int(code))
     raise Exception(
-        "logic error, not reserved code: 0x%02x" % ord(code))
+        "logic error, not reserved code: 0x%02x" % six.byte2int(code))
 
 
 def _unpack_nil(code, fp, options):
     if code == b'\xc0':
         return None
-    raise Exception("logic error, not nil: 0x%02x" % ord(code))
+    raise Exception("logic error, not nil: 0x%02x" % six.byte2int(code))
 
 
 def _unpack_boolean(code, fp, options):
@@ -641,7 +643,7 @@ def _unpack_boolean(code, fp, options):
         return False
     elif code == b'\xc3':
         return True
-    raise Exception("logic error, not boolean: 0x%02x" % ord(code))
+    raise Exception("logic error, not boolean: 0x%02x" % six.byte2int(code))
 
 
 def _unpack_float(code, fp, options):
@@ -649,12 +651,12 @@ def _unpack_float(code, fp, options):
         return struct.unpack(">f", _read_except(fp, 4))[0]
     elif code == b'\xcb':
         return struct.unpack(">d", _read_except(fp, 8))[0]
-    raise Exception("logic error, not float: 0x%02x" % ord(code))
+    raise Exception("logic error, not float: 0x%02x" % six.byte2int(code))
 
 
 def _unpack_string(code, fp, options):
-    if (ord(code) & 0xe0) == 0xa0:
-        length = ord(code) & ~0xe0
+    if (six.byte2int(code) & 0xe0) == 0xa0:
+        length = six.byte2int(code) & ~0xe0
     elif code == b'\xd9':
         length = struct.unpack("B", _read_except(fp, 1))[0]
     elif code == b'\xda':
@@ -662,7 +664,7 @@ def _unpack_string(code, fp, options):
     elif code == b'\xdb':
         length = struct.unpack(">I", _read_except(fp, 4))[0]
     else:
-        raise Exception("logic error, not string: 0x%02x" % ord(code))
+        raise Exception("logic error, not string: 0x%02x" % six.byte2int(code))
 
     # Always return raw bytes in compatibility mode
     global compatibility
@@ -686,7 +688,7 @@ def _unpack_binary(code, fp, options):
     elif code == b'\xc6':
         length = struct.unpack(">I", _read_except(fp, 4))[0]
     else:
-        raise Exception("logic error, not binary: 0x%02x" % ord(code))
+        raise Exception("logic error, not binary: 0x%02x" % six.byte2int(code))
 
     return _read_except(fp, length)
 
@@ -709,9 +711,9 @@ def _unpack_ext(code, fp, options):
     elif code == b'\xc9':
         length = struct.unpack(">I", _read_except(fp, 4))[0]
     else:
-        raise Exception("logic error, not ext: 0x%02x" % ord(code))
+        raise Exception("logic error, not ext: 0x%02x" % six.byte2int(code))
 
-    ext = Ext(ord(_read_except(fp, 1)), _read_except(fp, length))
+    ext = Ext(six.byte2int(_read_except(fp, 1)), _read_except(fp, length))
 
     # Unpack with ext handler, if we have one
     ext_handlers = options.get("ext_handlers")
@@ -722,14 +724,14 @@ def _unpack_ext(code, fp, options):
 
 
 def _unpack_array(code, fp, options):
-    if (ord(code) & 0xf0) == 0x90:
-        length = (ord(code) & ~0xf0)
+    if (six.byte2int(code) & 0xf0) == 0x90:
+        length = (six.byte2int(code) & ~0xf0)
     elif code == b'\xdc':
         length = struct.unpack(">H", _read_except(fp, 2))[0]
     elif code == b'\xdd':
         length = struct.unpack(">I", _read_except(fp, 4))[0]
     else:
-        raise Exception("logic error, not array: 0x%02x" % ord(code))
+        raise Exception("logic error, not array: 0x%02x" % six.byte2int(code))
 
     return [_unpack(fp, options) for _ in xrange(length)]
 
@@ -741,17 +743,17 @@ def _deep_list_to_tuple(obj):
 
 
 def _unpack_map(code, fp, options):
-    if (ord(code) & 0xf0) == 0x80:
-        length = (ord(code) & ~0xf0)
+    if (six.byte2int(code) & 0xf0) == 0x80:
+        length = (six.byte2int(code) & ~0xf0)
     elif code == b'\xde':
         length = struct.unpack(">H", _read_except(fp, 2))[0]
     elif code == b'\xdf':
         length = struct.unpack(">I", _read_except(fp, 4))[0]
     else:
-        raise Exception("logic error, not map: 0x%02x" % ord(code))
+        raise Exception("logic error, not map: 0x%02x" % six.byte2int(code))
 
     d = {} if not options.get('use_ordered_dict') \
-        else collections.OrderedDict()
+        else OrderedDict()
     for _ in xrange(length):
         # Unpack key
         k = _unpack(fp, options)
@@ -759,7 +761,7 @@ def _unpack_map(code, fp, options):
         if isinstance(k, list):
             # Attempt to convert list into a hashable tuple
             k = _deep_list_to_tuple(k)
-        elif not isinstance(k, collections.Hashable):
+        elif not isinstance(k, Hashable):
             raise UnhashableKeyException(
                 "encountered unhashable key: %s, %s" % (str(k), str(type(k))))
         elif k in d:
@@ -911,7 +913,7 @@ def _unpackb2(s, **options):
     """
     if not isinstance(s, (str, bytearray)):
         raise TypeError("packed data must be type 'str' or 'bytearray'")
-    return _unpack(io.BytesIO(s), options)
+    return _unpack(six.BytesIO(s), options)
 
 
 # For Python 3, expects a bytes object
@@ -957,7 +959,7 @@ def _unpackb3(s, **options):
     """
     if not isinstance(s, (bytes, bytearray)):
         raise TypeError("packed data must be type 'bytes' or 'bytearray'")
-    return _unpack(io.BytesIO(s), options)
+    return _unpack(six.BytesIO(s), options)
 
 #############################################################################
 # Module Initialization
@@ -990,7 +992,7 @@ def __init():
         _float_precision = "single"
 
     # Map packb and unpackb to the appropriate version
-    if sys.version_info[0] == 3:
+    if six.PY3:
         pack = _pack3
         packb = _packb3
         dump = _pack3

src/helper_addressbook.py

@@ -4,11 +4,12 @@ Insert value into addressbook
 
 from bmconfigparser import config
 from helper_sql import sqlExecute
+from dbcompat import dbstr
 
 
 def insert(address, label):
     """perform insert into addressbook"""
 
     if address not in config.addresses():
-        return sqlExecute('''INSERT INTO addressbook VALUES (?,?)''', label, address) == 1
+        return sqlExecute('''INSERT INTO addressbook VALUES (?,?)''', dbstr(label), dbstr(address)) == 1
     return False

src/helper_bitcoin.py

@@ -19,17 +19,17 @@ def calculateBitcoinAddressFromPubkey(pubkey):
     sha = hashlib.new('sha256')
     sha.update(pubkey)
     ripe.update(sha.digest())
-    ripeWithProdnetPrefix = '\x00' + ripe.digest()
+    ripeWithProdnetPrefix = b'\x00' + ripe.digest()
 
     checksum = hashlib.sha256(hashlib.sha256(
         ripeWithProdnetPrefix).digest()).digest()[:4]
     binaryBitcoinAddress = ripeWithProdnetPrefix + checksum
     numberOfZeroBytesOnBinaryBitcoinAddress = 0
-    while binaryBitcoinAddress[0] == '\x00':
+    while binaryBitcoinAddress[0] == b'\x00':
         numberOfZeroBytesOnBinaryBitcoinAddress += 1
         binaryBitcoinAddress = binaryBitcoinAddress[1:]
     base58encoded = arithmetic.changebase(binaryBitcoinAddress, 256, 58)
-    return "1" * numberOfZeroBytesOnBinaryBitcoinAddress + base58encoded
+    return b"1" * numberOfZeroBytesOnBinaryBitcoinAddress + base58encoded
 
 
 def calculateTestnetAddressFromPubkey(pubkey):
@@ -43,14 +43,14 @@ def calculateTestnetAddressFromPubkey(pubkey):
     sha = hashlib.new('sha256')
     sha.update(pubkey)
     ripe.update(sha.digest())
-    ripeWithProdnetPrefix = '\x6F' + ripe.digest()
+    ripeWithProdnetPrefix = b'\x6F' + ripe.digest()
 
     checksum = hashlib.sha256(hashlib.sha256(
         ripeWithProdnetPrefix).digest()).digest()[:4]
     binaryBitcoinAddress = ripeWithProdnetPrefix + checksum
     numberOfZeroBytesOnBinaryBitcoinAddress = 0
-    while binaryBitcoinAddress[0] == '\x00':
+    while binaryBitcoinAddress[0] == b'\x00':
         numberOfZeroBytesOnBinaryBitcoinAddress += 1
         binaryBitcoinAddress = binaryBitcoinAddress[1:]
     base58encoded = arithmetic.changebase(binaryBitcoinAddress, 256, 58)
-    return "1" * numberOfZeroBytesOnBinaryBitcoinAddress + base58encoded
+    return b"1" * numberOfZeroBytesOnBinaryBitcoinAddress + base58encoded

src/helper_inbox.py

@@ -1,12 +1,16 @@
 """Helper Inbox performs inbox messages related operations"""
 
+import sqlite3
+
 import queues
 from helper_sql import sqlExecute, sqlQuery
+from dbcompat import dbstr
 
 
 def insert(t):
     """Perform an insert into the "inbox" table"""
-    sqlExecute('''INSERT INTO inbox VALUES (?,?,?,?,?,?,?,?,?,?)''', *t)
+    u = [sqlite3.Binary(t[0]), dbstr(t[1]), dbstr(t[2]), dbstr(t[3]), dbstr(t[4]), dbstr(t[5]), dbstr(t[6]), t[7], t[8], sqlite3.Binary(t[9])]
+    sqlExecute('''INSERT INTO inbox VALUES (?,?,?,?,?,?,?,?,?,?)''', *u)
     # shouldn't emit changedInboxUnread and displayNewInboxMessage
     # at the same time
     # queues.UISignalQueue.put(('changedInboxUnread', None))
@@ -14,22 +18,31 @@ def insert(t):
 
 def trash(msgid):
     """Mark a message in the `inbox` as `trash`"""
-    sqlExecute('''UPDATE inbox SET folder='trash' WHERE msgid=?''', msgid)
+    rowcount = sqlExecute('''UPDATE inbox SET folder='trash' WHERE msgid=?''', sqlite3.Binary(msgid))
+    if rowcount < 1:
+        sqlExecute('''UPDATE inbox SET folder='trash' WHERE msgid=CAST(? AS TEXT)''', msgid)
     queues.UISignalQueue.put(('removeInboxRowByMsgid', msgid))
 
 
 def delete(ack_data):
     """Permanent delete message from trash"""
-    sqlExecute("DELETE FROM inbox WHERE msgid = ?", ack_data)
+    rowcount = sqlExecute("DELETE FROM inbox WHERE msgid = ?", sqlite3.Binary(ack_data))
+    if rowcount < 1:
+        sqlExecute("DELETE FROM inbox WHERE msgid = CAST(? AS TEXT)", ack_data)
 
 
 def undeleteMessage(msgid):
     """Undelte the message"""
-    sqlExecute('''UPDATE inbox SET folder='inbox' WHERE msgid=?''', msgid)
+    rowcount = sqlExecute('''UPDATE inbox SET folder='inbox' WHERE msgid=?''', sqlite3.Binary(msgid))
+    if rowcount < 1:
+        sqlExecute('''UPDATE inbox SET folder='inbox' WHERE msgid=CAST(? AS TEXT)''', msgid)
 
 
 def isMessageAlreadyInInbox(sigHash):
     """Check for previous instances of this message"""
     queryReturn = sqlQuery(
-        '''SELECT COUNT(*) FROM inbox WHERE sighash=?''', sigHash)
+        '''SELECT COUNT(*) FROM inbox WHERE sighash=?''', sqlite3.Binary(sigHash))
+    if len(queryReturn) < 1:
+        queryReturn = sqlQuery(
+            '''SELECT COUNT(*) FROM inbox WHERE sighash=CAST(? AS TEXT)''', sigHash)
     return queryReturn[0][0] != 0

src/helper_msgcoding.py

@@ -2,7 +2,6 @@
 Message encoding end decoding functions
 """
 
-import string
 import zlib
 
 import messagetypes
@@ -71,7 +70,8 @@ class MsgEncode(object):
 
     def encodeSimple(self, message):
         """Handle simple encoding"""
-        self.data = 'Subject:%(subject)s\nBody:%(body)s' % message
+        data = 'Subject:%(subject)s\nBody:%(body)s' % message
+        self.data = data.encode("utf-8", "replace")
         self.length = len(self.data)
 
     def encodeTrivial(self, message):
@@ -99,14 +99,14 @@ class MsgDecode(object):
     def decodeExtended(self, data):
         """Handle extended encoding"""
         dc = zlib.decompressobj()
-        tmp = ""
+        tmp = b""
         while len(tmp) <= config.safeGetInt("zlib", "maxsize"):
             try:
                 got = dc.decompress(
                     data, config.safeGetInt("zlib", "maxsize")
                     + 1 - len(tmp))
                 # EOF
-                if got == "":
+                if got == b"":
                     break
                 tmp += got
                 data = dc.unconsumed_tail
@@ -142,7 +142,7 @@ class MsgDecode(object):
 
     def decodeSimple(self, data):
         """Handle simple encoding"""
-        bodyPositionIndex = string.find(data, '\nBody:')
+        bodyPositionIndex = data.find(b'\nBody:')
         if bodyPositionIndex > 1:
             subject = data[8:bodyPositionIndex]
             # Only save and show the first 500 characters of the subject.
@@ -150,10 +150,11 @@ class MsgDecode(object):
             subject = subject[:500]
             body = data[bodyPositionIndex + 6:]
         else:
-            subject = ''
+            subject = b''
             body = data
         # Throw away any extra lines (headers) after the subject.
         if subject:
             subject = subject.splitlines()[0]
-        self.subject = subject
-        self.body = body
+        # Field types should be the same for all message types
+        self.subject = subject.decode("utf-8", "replace")
+        self.body = body.decode("utf-8", "replace")

src/helper_search.py

@@ -5,6 +5,7 @@ Used by :mod:`.bitmessageqt`.
 
 from helper_sql import sqlQuery
 from tr import _translate
+from dbcompat import dbstr
 
 
 def search_sql(
@@ -52,23 +53,23 @@ def search_sql(
     if account is not None:
         if xAddress == 'both':
             sqlStatementParts.append('(fromaddress = ? OR toaddress = ?)')
-            sqlArguments.append(account)
-            sqlArguments.append(account)
+            sqlArguments.append(dbstr(account))
+            sqlArguments.append(dbstr(account))
         else:
             sqlStatementParts.append(xAddress + ' = ? ')
-            sqlArguments.append(account)
+            sqlArguments.append(dbstr(account))
     if folder is not None:
         if folder == 'new':
             folder = 'inbox'
             unreadOnly = True
         sqlStatementParts.append('folder = ? ')
-        sqlArguments.append(folder)
+        sqlArguments.append(dbstr(folder))
     else:
         sqlStatementParts.append('folder != ?')
-        sqlArguments.append('trash')
+        sqlArguments.append(dbstr('trash'))
     if what:
         sqlStatementParts.append('%s LIKE ?' % (where))
-        sqlArguments.append(what)
+        sqlArguments.append(dbstr(what))
     if unreadOnly:
         sqlStatementParts.append('read = 0')
     if sqlStatementParts:

src/helper_sent.py

@@ -4,10 +4,12 @@ Insert values into sent table
 
 import time
 import uuid
+import sqlite3
 from addresses import decodeAddress
 from bmconfigparser import config
 from helper_ackPayload import genAckPayload
 from helper_sql import sqlExecute, sqlQuery
+from dbcompat import dbstr
 
 
 # pylint: disable=too-many-arguments
@@ -38,8 +40,8 @@ def insert(msgid=None, toAddress='[Broadcast subscribers]', fromAddress=None, su
 
         ttl = ttl if ttl else config.getint('bitmessagesettings', 'ttl')
 
-        t = (msgid, toAddress, ripe, fromAddress, subject, message, ackdata,
-             sentTime, lastActionTime, sleeptill, status, retryNumber, folder,
+        t = (sqlite3.Binary(msgid), dbstr(toAddress), sqlite3.Binary(ripe), dbstr(fromAddress), dbstr(subject), dbstr(message), sqlite3.Binary(ackdata),
+             sentTime, lastActionTime, sleeptill, dbstr(status), retryNumber, dbstr(folder),
              encoding, ttl)
 
         sqlExecute('''INSERT INTO sent VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)''', *t)
@@ -50,20 +52,30 @@ def insert(msgid=None, toAddress='[Broadcast subscribers]', fromAddress=None, su
 
 def delete(ack_data):
     """Perform Delete query"""
-    sqlExecute("DELETE FROM sent WHERE ackdata = ?", ack_data)
+    rowcount = sqlExecute("DELETE FROM sent WHERE ackdata = ?", sqlite3.Binary(ack_data))
+    if rowcount < 1:
+        sqlExecute("DELETE FROM sent WHERE ackdata = CAST(? AS TEXT)", ack_data)
 
 
 def retrieve_message_details(ack_data):
     """Retrieving Message details"""
     data = sqlQuery(
-        "select toaddress, fromaddress, subject, message, received from inbox where msgid = ?", ack_data
+        "select toaddress, fromaddress, subject, message, received from inbox where msgid = ?", sqlite3.Binary(ack_data)
     )
+    if len(data) < 1:
+        data = sqlQuery(
+            "select toaddress, fromaddress, subject, message, received from inbox where msgid = CAST(? AS TEXT)", ack_data
+        )
     return data
 
 
 def trash(ackdata):
     """Mark a message in the `sent` as `trash`"""
     rowcount = sqlExecute(
-        '''UPDATE sent SET folder='trash' WHERE ackdata=?''', ackdata
+        '''UPDATE sent SET folder='trash' WHERE ackdata=?''', sqlite3.Binary(ackdata)
     )
+    if rowcount < 1:
+        rowcount = sqlExecute(
+            '''UPDATE sent SET folder='trash' WHERE ackdata=CAST(? AS TEXT)''', ackdata
+        )
     return rowcount

src/helper_sql.py

@@ -61,7 +61,7 @@ def sqlQuery(sql_statement, *args):
     return queryreturn
 
 
-def sqlExecuteChunked(sql_statement, idCount, *args):
+def sqlExecuteChunked(sql_statement, as_text, idCount, *args):
     """Execute chunked SQL statement to avoid argument limit"""
     # SQLITE_MAX_VARIABLE_NUMBER,
     # unfortunately getting/setting isn't exposed to python
@@ -80,9 +80,18 @@ def sqlExecuteChunked(sql_statement, idCount, *args):
             chunk_slice = args[
                 i:i + sqlExecuteChunked.chunkSize - (len(args) - idCount)
             ]
-            sqlSubmitQueue.put(
-                sql_statement.format(','.join('?' * len(chunk_slice)))
-            )
+            if as_text:
+                q = ""
+                n = len(chunk_slice)
+                for i in range(n):
+                    q += "CAST(? AS TEXT)"
+                    if i != n - 1:
+                        q += ","
+                sqlSubmitQueue.put(sql_statement.format(q))
+            else:
+                sqlSubmitQueue.put(
+                    sql_statement.format(','.join('?' * len(chunk_slice)))
+                )
             # first static args, and then iterative chunk
             sqlSubmitQueue.put(
                 args[0:len(args) - idCount] + chunk_slice

src/highlevelcrypto.py

@@ -7,6 +7,8 @@ High level cryptographic functions based on `.pyelliptic` OpenSSL bindings.
   `More discussion. <https://github.com/yann2192/pyelliptic/issues/32>`_
 """
 
+from unqstr import unic
+
 import hashlib
 import os
 from binascii import hexlify
@@ -102,7 +104,7 @@ def random_keys():
 
 def deterministic_keys(passphrase, nonce):
     """Generate keys from *passphrase* and *nonce* (encoded as varint)"""
-    priv = hashlib.sha512(passphrase + nonce).digest()[:32]
+    priv = hashlib.sha512(unic(passphrase).encode("utf-8", "replace") + nonce).digest()[:32]
     pub = pointMult(priv)
     return priv, pub
 

src/inventory.py

@@ -28,8 +28,6 @@ class Inventory:
 
     # cheap inheritance copied from asyncore
     def __getattr__(self, attr):
-        if attr == "__contains__":
-            self.numberOfInventoryLookupsPerformed += 1
         try:
             realRet = getattr(self._realInventory, attr)
         except AttributeError:
@@ -40,6 +38,10 @@ class Inventory:
         else:
             return realRet
 
+    def __contains__(self, key):
+        self.numberOfInventoryLookupsPerformed += 1
+        return key in self._realInventory
+
     # hint for pylint: this is dictionary like object
     def __getitem__(self, key):
         return self._realInventory[key]

src/l10n.py

@@ -3,8 +3,8 @@
 import logging
 import os
 import re
-import sys
 import time
+import six
 
 from six.moves import range
 
@@ -61,7 +61,7 @@ if not re.search(r'\d', time.strftime(time_format)):
 
 # It seems some systems lie about the encoding they use
 # so we perform comprehensive decoding tests
-elif sys.version_info[0] == 2:
+elif six.PY2:
     try:
         # Check day names
         for i in range(7):
@@ -118,7 +118,7 @@ def formatTimestamp(timestamp=None):
         except ValueError:
             timestring = time.strftime(time_format)
 
-    if sys.version_info[0] == 2:
+    if six.PY2:
         return timestring.decode(encoding)
     return timestring
 

src/namecoin.py

@@ -1,10 +1,10 @@
 """
 Namecoin queries
 """
-# pylint: disable=too-many-branches,protected-access
+# pylint: disable=too-many-branches
 
 import base64
-import httplib
+from six.moves import http_client as httplib
 import json
 import os
 import socket
@@ -14,14 +14,14 @@ import defaults
 from addresses import decodeAddress
 from bmconfigparser import config
 from debug import logger
-from tr import _translate  # translate
+from tr import _translate
+
 
 configSection = "bitmessagesettings"
 
 
 class RPCError(Exception):
     """Error thrown when the RPC call returns an error."""
-
     error = None
 
     def __init__(self, data):
@@ -29,7 +29,7 @@ class RPCError(Exception):
         self.error = data
 
     def __str__(self):
-        return "{0}: {1}".format(type(self).__name__, self.error)
+        return '{0}: {1}'.format(type(self).__name__, self.error)
 
 
 class namecoinConnection(object):
@@ -46,8 +46,8 @@ class namecoinConnection(object):
 
     def __init__(self, options=None):
         """
-        Initialise.  If options are given, take the connection settings from
-        them instead of loading from the configs.  This can be used to test
+        Initialise. If options are given, take the connection settings from
+        them instead of loading from the configs. This can be used to test
         currently entered connection settings in the config dialog without
         actually changing the values (yet).
         """
@@ -69,14 +69,14 @@ class namecoinConnection(object):
             self.user = options["user"]
             self.password = options["password"]
 
-        assert self.nmctype == "namecoind" or self.nmctype == "nmcontrol"
+        assert self.nmctype in ("namecoind", "nmcontrol")
         if self.nmctype == "namecoind":
             self.con = httplib.HTTPConnection(self.host, self.port, timeout=3)
 
     def query(self, identity):
         """
         Query for the bitmessage address corresponding to the given identity
-        string.  If it doesn't contain a slash, id/ is prepended.  We return
+        string. If it doesn't contain a slash, id/ is prepended. We return
         the result as (Error, Address) pair, where the Error is an error
         message to display or None in case of success.
         """
@@ -96,8 +96,8 @@ class namecoinConnection(object):
                 res = res["reply"]
                 if not res:
                     return (_translate(
-                        "MainWindow", "The name %1 was not found."
-                    ).arg(identity.decode("utf-8", "ignore")), None)
+                        "MainWindow", "The name {0} was not found."
+                    ).format(identity.decode("utf-8", "ignore")), None)
             else:
                 assert False
         except RPCError as exc:
@@ -107,12 +107,12 @@ class namecoinConnection(object):
             else:
                 errmsg = exc.error
             return (_translate(
-                "MainWindow", "The namecoin query failed (%1)"
-            ).arg(errmsg.decode("utf-8", "ignore")), None)
+                "MainWindow", "The namecoin query failed ({0})"
+            ).format(errmsg.decode("utf-8", "ignore")), None)
         except AssertionError:
             return (_translate(
-                "MainWindow", "Unknown namecoin interface type: %1"
-            ).arg(self.nmctype.decode("utf-8", "ignore")), None)
+                "MainWindow", "Unknown namecoin interface type: {0}"
+            ).format(self.nmctype.decode("utf-8", "ignore")), None)
         except Exception:
             logger.exception("Namecoin query exception")
             return (_translate(
@@ -135,12 +135,12 @@ class namecoinConnection(object):
         ) if valid else (
             _translate(
                 "MainWindow",
-                "The name %1 has no associated Bitmessage address."
-            ).arg(identity.decode("utf-8", "ignore")), None)
+                "The name {0} has no associated Bitmessage address."
+            ).format(identity.decode("utf-8", "ignore")), None)
 
     def test(self):
         """
-        Test the connection settings.  This routine tries to query a "getinfo"
+        Test the connection settings. This routine tries to query a "getinfo"
         command, and builds either an error message or a success message with
         some info from it.
         """
@@ -160,11 +160,10 @@ class namecoinConnection(object):
                     versStr = "0.%d.%d" % (v1, v2)
                 else:
                     versStr = "0.%d.%d.%d" % (v1, v2, v3)
-                message = (
-                    "success",
-                    _translate(
+                return (
+                    'success', _translate(
                         "MainWindow",
-                        "Success!  Namecoind version %1 running.").arg(
+                        "Success!  Namecoind version {0} running.").format(
                             versStr.decode("utf-8", "ignore")))
 
             elif self.nmctype == "nmcontrol":
@@ -172,32 +171,24 @@ class namecoinConnection(object):
                 prefix = "Plugin data running"
                 if ("reply" in res) and res["reply"][:len(prefix)] == prefix:
                     return (
-                        "success",
-                        _translate(
+                        'success', _translate(
                             "MainWindow",
-                            "Success!  NMControll is up and running."
-                        )
+                            "Success! NMControll is up and running.")
                     )
 
                 logger.error("Unexpected nmcontrol reply: %s", res)
-                message = (
-                    "failed",
-                    _translate(
-                        "MainWindow",
-                        "Couldn\'t understand NMControl."
-                    )
+                return (
+                    'failed', _translate(
+                        "MainWindow", "Couldn\'t understand NMControl.")
                 )
 
             else:
                 sys.exit("Unsupported Namecoin type")
 
-            return message
-
         except Exception:
             logger.info("Namecoin connection test failure")
             return (
-                "failed",
-                _translate(
+                'failed', _translate(
                     "MainWindow", "The connection to namecoin failed.")
             )
 
@@ -245,26 +236,24 @@ class namecoinConnection(object):
                 "Authorization", "Basic %s" % base64.b64encode(authstr))
             self.con.endheaders()
             self.con.send(data)
+            try:
+                resp = self.con.getresponse()
+                result = resp.read()
+                if resp.status != 200:
+                    raise Exception(
+                        "Namecoin returned status %i: %s" %
+                        (resp.status, resp.reason))
+            except:  # noqa:E722
+                logger.info("HTTP receive error")
         except:  # noqa:E722
             logger.info("HTTP connection error")
-            return None
-
-        try:
-            resp = self.con.getresponse()
-            result = resp.read()
-            if resp.status != 200:
-                raise Exception(
-                    "Namecoin returned status"
-                    " %i: %s" % (resp.status, resp.reason))
-        except:  # noqa:E722
-            logger.info("HTTP receive error")
-            return None
 
         return result
 
     def queryServer(self, data):
-        """Helper routine sending data to the RPC "
-        "server and returning the result."""
+        """
+        Helper routine sending data to the RPC server and returning the result.
+        """
 
         try:
             s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
@@ -296,23 +285,24 @@ def lookupNamecoinFolder():
     """
 
     app = "namecoin"
-    from os import path, environ
+
     if sys.platform == "darwin":
-        if "HOME" in environ:
-            dataFolder = path.join(os.environ["HOME"],
-                                   "Library/Application Support/", app) + "/"
-        else:
+        try:
+            dataFolder = os.path.join(
+                os.getenv("HOME"), "Library/Application Support/", app)
+        except TypeError:  # getenv is None
             sys.exit(
                 "Could not find home folder, please report this message"
                 " and your OS X version to the BitMessage Github."
-            )
+            )  # TODO: remove exits from utility modules
 
-    elif "win32" in sys.platform or "win64" in sys.platform:
-        dataFolder = path.join(environ["APPDATA"], app) + "\\"
-    else:
-        dataFolder = path.join(environ["HOME"], ".%s" % app) + "/"
+    dataFolder = (
+        os.path.join(os.getenv("APPDATA"), app)
+        if sys.platform.startswith('win') else
+        os.path.join(os.getenv("HOME"), ".%s" % app)
+    )
 
-    return dataFolder
+    return dataFolder + os.path.sep
 
 
 def ensureNamecoinOptions():
@@ -357,8 +347,8 @@ def ensureNamecoinOptions():
         nmc.close()
     except IOError:
         logger.warning(
-            "%s unreadable or missing, Namecoin support deactivated",
-            nmcConfig)
+            "%s unreadable or missing, Namecoin support deactivated", nmcConfig
+        )
     except Exception:
         logger.warning("Error processing namecoin.conf", exc_info=True)
 

src/network/__init__.py

@@ -20,7 +20,7 @@ __all__ = ["StoppableThread"]
 def start(config, state):
     """Start network threads"""
     from .announcethread import AnnounceThread
-    import connectionpool  # pylint: disable=relative-import
+    from network import connectionpool
     from .addrthread import AddrThread
     from .downloadthread import DownloadThread
     from .invthread import InvThread

src/network/addrthread.py

@@ -5,11 +5,11 @@ import random
 from six.moves import queue
 
 # magic imports!
-import connectionpool
+from network import connectionpool
 from protocol import assembleAddrMessage
 from network import addrQueue  # FIXME: init with queue
 
-from threads import StoppableThread
+from .threads import StoppableThread
 
 
 class AddrThread(StoppableThread):

src/network/advanceddispatcher.py

@@ -7,7 +7,7 @@ import time
 
 import network.asyncore_pollchoose as asyncore
 import state
-from threads import BusyError, nonBlocking
+from .threads import BusyError, nonBlocking
 
 
 class ProcessingError(Exception):

src/network/announcethread.py

@@ -4,12 +4,12 @@ Announce myself (node address)
 import time
 
 # magic imports!
-import connectionpool
+from network import connectionpool
 from bmconfigparser import config
 from protocol import assembleAddrMessage
 
-from node import Peer
-from threads import StoppableThread
+from .node import Peer
+from .threads import StoppableThread
 
 
 class AnnounceThread(StoppableThread):

src/network/asyncore_pollchoose.py

@@ -19,6 +19,7 @@ from errno import (
     ENOTCONN, ENOTSOCK, EPIPE, ESHUTDOWN, ETIMEDOUT, EWOULDBLOCK, errorcode
 )
 from threading import current_thread
+from six.moves.reprlib import repr
 
 
 try:
@@ -723,21 +724,6 @@ class dispatcher(object):
             if why.args[0] not in (ENOTCONN, EBADF):
                 raise
 
-    # cheap inheritance, used to pass all other attribute
-    # references to the underlying socket object.
-    def __getattr__(self, attr):
-        try:
-            retattr = getattr(self.socket, attr)
-        except AttributeError:
-            raise AttributeError(
-                "%s instance has no attribute '%s'"
-                % (self.__class__.__name__, attr))
-        else:
-            msg = "%(me)s.%(attr)s is deprecated; use %(me)s.socket.%(attr)s"\
-                  " instead" % {'me': self.__class__.__name__, 'attr': attr}
-            warnings.warn(msg, DeprecationWarning, stacklevel=2)
-            return retattr
-
     # log and log_info may be overridden to provide more sophisticated
     # logging and warning methods. In general, log is for 'hit' logging
     # and 'log_info' is for informational, warning and error logging.

src/network/bmobject.py

@@ -6,7 +6,7 @@ import time
 
 import protocol
 import state
-import connectionpool
+import network.connectionpool  # use long name to address recursive import
 from network import dandelion_ins
 from highlevelcrypto import calculateInventoryHash
 
@@ -100,7 +100,7 @@ class BMObject(object):  # pylint: disable=too-many-instance-attributes
             logger.warning(
                 'The object has invalid stream: %s', self.streamNumber)
             raise BMObjectInvalidError()
-        if self.streamNumber not in connectionpool.pool.streams:
+        if self.streamNumber not in network.connectionpool.pool.streams:
             logger.debug(
                 'The streamNumber %i isn\'t one we are interested in.',
                 self.streamNumber)

src/network/bmproto.py

@@ -9,13 +9,14 @@ import re
 import socket
 import struct
 import time
+import six
 
 # magic imports!
 import addresses
-import knownnodes
+from network import knownnodes
 import protocol
 import state
-import connectionpool
+import network.connectionpool  # use long name to address recursive import
 from bmconfigparser import config
 from queues import objectProcessorQueue
 from randomtrackingdict import RandomTrackingDict
@@ -26,14 +27,27 @@ from network.bmobject import (
     BMObjectUnwantedStreamError
 )
 from network.proxy import ProxyError
+
 from network import dandelion_ins, invQueue, portCheckerQueue
-from node import Node, Peer
-from objectracker import ObjectTracker, missingObjects
+from .node import Node, Peer
+from .objectracker import ObjectTracker, missingObjects
 
 
 logger = logging.getLogger('default')
 
 
+def _hoststr(v):
+    if six.PY3:
+        return v
+    else:  # assume six.PY2
+        return str(v)
+
+def _restr(v):
+    if six.PY3:
+        return v.decode("utf-8", "replace")
+    else:  # assume six.PY2
+        return v
+
 class BMProtoError(ProxyError):
     """A Bitmessage Protocol Base Error"""
     errorCodes = ("Protocol error")
@@ -82,7 +96,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         """Process incoming header"""
         self.magic, self.command, self.payloadLength, self.checksum = \
             protocol.Header.unpack(self.read_buf[:protocol.Header.size])
-        self.command = self.command.rstrip('\x00')
+        self.command = self.command.rstrip(b'\x00')
         if self.magic != protocol.magic:
             # skip 1 byte in order to sync
             self.set_state("bm_header", length=1)
@@ -107,7 +121,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             self.invalid = True
         retval = True
         if not self.fullyEstablished and self.command not in (
-                "error", "version", "verack"):
+                b"error", b"version", b"verack"):
             logger.error(
                 'Received command %s before connection was fully'
                 ' established, ignoring', self.command)
@@ -115,7 +129,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         if not self.invalid:
             try:
                 retval = getattr(
-                    self, "bm_command_" + str(self.command).lower())()
+                    self, "bm_command_" + self.command.decode("utf-8", "replace").lower())()
             except AttributeError:
                 # unimplemented command
                 logger.debug('unimplemented command %s', self.command)
@@ -168,17 +182,17 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         """Decode node details from the payload"""
         # protocol.checkIPAddress()
         services, host, port = self.decode_payload_content("Q16sH")
-        if host[0:12] == '\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF':
-            host = socket.inet_ntop(socket.AF_INET, str(host[12:16]))
-        elif host[0:6] == '\xfd\x87\xd8\x7e\xeb\x43':
+        if host[0:12] == b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\xFF\xFF':
+            host = socket.inet_ntop(socket.AF_INET, _hoststr(host[12:16]))
+        elif host[0:6] == b'\xfd\x87\xd8\x7e\xeb\x43':
             # Onion, based on BMD/bitcoind
-            host = base64.b32encode(host[6:]).lower() + ".onion"
+            host = base64.b32encode(host[6:]).lower() + b".onion"
         else:
-            host = socket.inet_ntop(socket.AF_INET6, str(host))
-        if host == "":
+            host = socket.inet_ntop(socket.AF_INET6, _hoststr(host))
+        if host == b"":
             # This can happen on Windows systems which are not 64-bit
             # compatible so let us drop the IPv6 address.
-            host = socket.inet_ntop(socket.AF_INET, str(host[12:16]))
+            host = socket.inet_ntop(socket.AF_INET, _hoststr(host[12:16]))
 
         return Node(services, host, port)
 
@@ -334,7 +348,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         if now < self.skipUntil:
             return True
         for i in items:
-            self.pendingUpload[str(i)] = now
+            self.pendingUpload[i] = now
         return True
 
     def _command_inv(self, extend_dandelion_stem=False):
@@ -353,7 +367,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         if extend_dandelion_stem and not dandelion_ins.enabled:
             return True
 
-        for i in map(str, items):
+        for i in items:
             if i in state.Inventory and not dandelion_ins.hasHash(i):
                 continue
             if extend_dandelion_stem and not dandelion_ins.hasHash(i):
@@ -409,13 +423,17 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
 
         try:
             self.object.checkObjectByType()
+            if six.PY2:
+                data_buffer = buffer(self.object.data)
+            else:  # assume six.PY3
+                data_buffer = memoryview(self.object.data)
             objectProcessorQueue.put((
-                self.object.objectType, buffer(self.object.data)))  # noqa: F821
+                self.object.objectType, data_buffer))  # noqa: F821
         except BMObjectInvalidError:
             BMProto.stopDownloadingObject(self.object.inventoryHash, True)
         else:
             try:
-                del missingObjects[self.object.inventoryHash]
+                del missingObjects[bytes(self.object.inventoryHash)]
             except KeyError:
                 pass
 
@@ -424,10 +442,16 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             dandelion_ins.removeHash(
                 self.object.inventoryHash, "cycle detection")
 
+        if six.PY2:
+            object_buffer = buffer(self.payload[objectOffset:])
+            tag_buffer = buffer(self.object.tag)
+        else:  # assume six.PY3
+            object_buffer = memoryview(self.payload[objectOffset:])
+            tag_buffer = memoryview(self.object.tag)
         state.Inventory[self.object.inventoryHash] = (
             self.object.objectType, self.object.streamNumber,
-            buffer(self.payload[objectOffset:]), self.object.expiresTime,  # noqa: F821
-            buffer(self.object.tag)  # noqa: F821
+            object_buffer, self.object.expiresTime,  # noqa: F821
+            tag_buffer  # noqa: F821
         )
         self.handleReceivedObject(
             self.object.streamNumber, self.object.inventoryHash)
@@ -443,11 +467,10 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         """Incoming addresses, process them"""
         # not using services
         for seenTime, stream, _, ip, port in self._decode_addr():
-            ip = str(ip)
             if (
-                stream not in connectionpool.pool.streams
+                stream not in network.connectionpool.pool.streams
                 # FIXME: should check against complete list
-                or ip.startswith('bootstrap')
+                or ip.decode("utf-8", "replace").startswith('bootstrap')
             ):
                 continue
             decodedIP = protocol.checkIPAddress(ip)
@@ -477,7 +500,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
 
     def bm_command_ping(self):
         """Incoming ping, respond to it."""
-        self.append_write_buf(protocol.CreatePacket('pong'))
+        self.append_write_buf(protocol.CreatePacket(b'pong'))
         return True
 
     @staticmethod
@@ -526,21 +549,21 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
         logger.debug(
             'remote node incoming address: %s:%i',
             self.destination.host, self.peerNode.port)
-        logger.debug('user agent: %s', self.userAgent)
+        logger.debug('user agent: %s', self.userAgent.decode("utf-8", "replace"))
         logger.debug('streams: [%s]', ','.join(map(str, self.streams)))
         if not self.peerValidityChecks():
             # ABORT afterwards
             return True
-        self.append_write_buf(protocol.CreatePacket('verack'))
+        self.append_write_buf(protocol.CreatePacket(b'verack'))
         self.verackSent = True
         ua_valid = re.match(
-            r'^/[a-zA-Z]+:[0-9]+\.?[\w\s\(\)\./:;-]*/$', self.userAgent)
+            r'^/[a-zA-Z]+:[0-9]+\.?[\w\s\(\)\./:;-]*/$', _restr(self.userAgent))
         if not ua_valid:
-            self.userAgent = '/INVALID:0/'
+            self.userAgent = b'/INVALID:0/'
         if not self.isOutbound:
             self.append_write_buf(protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                connectionpool.pool.streams, dandelion_ins.enabled, True,
+                network.connectionpool.pool.streams, dandelion_ins.enabled, True,
                 nodeid=self.nodeid))
             logger.debug(
                 '%(host)s:%(port)i sending version',
@@ -596,7 +619,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
                 'Closed connection to %s because there is no overlapping'
                 ' interest in streams.', self.destination)
             return False
-        if connectionpool.pool.inboundConnections.get(
+        if network.connectionpool.pool.inboundConnections.get(
                 self.destination):
             try:
                 if not protocol.checkSocksIP(self.destination.host):
@@ -614,8 +637,8 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
             # or server full report the same error to counter deanonymisation
             if (
                 Peer(self.destination.host, self.peerNode.port)
-                in connectionpool.pool.inboundConnections
-                or len(connectionpool.pool)
+                in network.connectionpool.pool.inboundConnections
+                or len(network.connectionpool.pool)
                 > config.safeGetInt(
                     'bitmessagesettings', 'maxtotalconnections')
                 + config.safeGetInt(
@@ -627,7 +650,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
                     'Closed connection to %s due to server full'
                     ' or duplicate inbound/outbound.', self.destination)
                 return False
-        if connectionpool.pool.isAlreadyConnected(self.nonce):
+        if network.connectionpool.pool.isAlreadyConnected(self.nonce):
             self.append_write_buf(protocol.assembleErrorMessage(
                 errorText="I'm connected to myself. Closing connection.",
                 fatal=2))
@@ -641,7 +664,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
     @staticmethod
     def stopDownloadingObject(hashId, forwardAnyway=False):
         """Stop downloading object *hashId*"""
-        for connection in connectionpool.pool.connections():
+        for connection in network.connectionpool.pool.connections():
             try:
                 del connection.objectsNewToMe[hashId]
             except KeyError:
@@ -653,7 +676,7 @@ class BMProto(AdvancedDispatcher, ObjectTracker):
                 except KeyError:
                     pass
         try:
-            del missingObjects[hashId]
+            del missingObjects[bytes(hashId)]
         except KeyError:
             pass
 

src/network/connectionchooser.py

@@ -7,7 +7,7 @@ import random
 
 from six.moves import queue
 
-import knownnodes
+from network import knownnodes
 import protocol
 import state
 
@@ -17,10 +17,16 @@ from network import portCheckerQueue
 logger = logging.getLogger('default')
 
 
+def _ends_with(s, tail):
+    try:
+        return s.endswith(tail)
+    except:
+        return s.decode("utf-8", "replace").endswith(tail)
+
 def getDiscoveredPeer():
     """Get a peer from the local peer discovery list"""
     try:
-        peer = random.choice(state.discoveredPeers.keys())  # nosec B311
+        peer = random.choice(list(state.discoveredPeers.keys()))  # nosec B311
     except (IndexError, KeyError):
         raise ValueError
     try:
@@ -48,7 +54,7 @@ def chooseConnection(stream):
         return getDiscoveredPeer()
     for _ in range(50):
         peer = random.choice(  # nosec B311
-            knownnodes.knownNodes[stream].keys())
+            list(knownnodes.knownNodes[stream].keys()))
         try:
             peer_info = knownnodes.knownNodes[stream][peer]
             if peer_info.get('self'):
@@ -60,10 +66,10 @@ def chooseConnection(stream):
         if haveOnion:
             # do not connect to raw IP addresses
             # --keep all traffic within Tor overlay
-            if onionOnly and not peer.host.endswith('.onion'):
+            if onionOnly and not _ends_with(peer.host, '.onion'):
                 continue
             # onion addresses have a higher priority when SOCKS
-            if peer.host.endswith('.onion') and rating > 0:
+            if _ends_with(peer.host, '.onion') and rating > 0:
                 rating = 1
             # TODO: need better check
             elif not peer.host.startswith('bootstrap'):

src/network/connectionpool.py

@@ -9,22 +9,28 @@ import sys
 import time
 import random
 
-import asyncore_pollchoose as asyncore
-import knownnodes
+from network import asyncore_pollchoose as asyncore
+from network import knownnodes
 import protocol
 import state
 from bmconfigparser import config
-from connectionchooser import chooseConnection
-from node import Peer
-from proxy import Proxy
-from tcp import (
+from .connectionchooser import chooseConnection
+from .node import Peer
+from .proxy import Proxy
+from .tcp import (
     bootstrap, Socks4aBMConnection, Socks5BMConnection,
     TCPConnection, TCPServer)
-from udp import UDPSocket
+from .udp import UDPSocket
 
 logger = logging.getLogger('default')
 
 
+def _ends_with(s, tail):
+    try:
+        return s.endswith(tail)
+    except:
+        return s.decode("utf-8", "replace").endswith(tail)
+
 class BMConnectionPool(object):
     """Pool of all existing connections"""
     # pylint: disable=too-many-instance-attributes
@@ -78,7 +84,7 @@ class BMConnectionPool(object):
         Shortcut for combined list of connections from
         `inboundConnections` and `outboundConnections` dicts
         """
-        return self.inboundConnections.values() + self.outboundConnections.values()
+        return list(self.inboundConnections.values()) + list(self.outboundConnections.values())
 
     def establishedConnections(self):
         """Shortcut for list of connections having fullyEstablished == True"""
@@ -160,8 +166,8 @@ class BMConnectionPool(object):
     @staticmethod
     def getListeningIP():
         """What IP are we supposed to be listening on?"""
-        if config.safeGet(
-                "bitmessagesettings", "onionhostname", "").endswith(".onion"):
+        if _ends_with(config.safeGet(
+                "bitmessagesettings", "onionhostname", ""), ".onion"):
             host = config.safeGet(
                 "bitmessagesettings", "onionbindip")
         else:
@@ -314,7 +320,7 @@ class BMConnectionPool(object):
                         continue
 
                     try:
-                        if chosen.host.endswith(".onion") and Proxy.onion_proxy:
+                        if _ends_with(chosen.host, ".onion") and Proxy.onion_proxy:
                             if onionsocksproxytype == "SOCKS5":
                                 self.addConnection(Socks5BMConnection(chosen))
                             elif onionsocksproxytype == "SOCKS4a":
@@ -381,14 +387,14 @@ class BMConnectionPool(object):
                 minTx -= 300 - 20
             if i.lastTx < minTx:
                 if i.fullyEstablished:
-                    i.append_write_buf(protocol.CreatePacket('ping'))
+                    i.append_write_buf(protocol.CreatePacket(b'ping'))
                 else:
                     i.close_reason = "Timeout (%is)" % (
                         time.time() - i.lastTx)
                     i.set_state("close")
         for i in (
             self.connections()
-            + self.listeningSockets.values() + self.udpSockets.values()
+            + list(self.listeningSockets.values()) + list(self.udpSockets.values())
         ):
             if not (i.accepting or i.connecting or i.connected):
                 reaper.append(i)

src/network/dandelion.py

@@ -6,6 +6,8 @@ from collections import namedtuple
 from random import choice, expovariate, sample
 from threading import RLock
 from time import time
+import six
+from binascii import hexlify
 
 
 # randomise routes after 600 seconds
@@ -64,7 +66,7 @@ class Dandelion:  # pylint: disable=old-style-class
         """Add inventory vector to dandelion stem return status of dandelion enabled"""
         assert self.enabled is not None
         with self.lock:
-            self.hashMap[hashId] = Stem(
+            self.hashMap[bytes(hashId)] = Stem(
                 self.getNodeStem(source),
                 stream,
                 self.poissonTimeout())
@@ -75,9 +77,10 @@ class Dandelion:  # pylint: disable=old-style-class
         include streams, we only learn this after receiving the object)
         """
         with self.lock:
-            if hashId in self.hashMap:
-                self.hashMap[hashId] = Stem(
-                    self.hashMap[hashId].child,
+            hashId_bytes = bytes(hashId)
+            if hashId_bytes in self.hashMap:
+                self.hashMap[hashId_bytes] = Stem(
+                    self.hashMap[hashId_bytes].child,
                     stream,
                     self.poissonTimeout())
 
@@ -86,20 +89,20 @@ class Dandelion:  # pylint: disable=old-style-class
         if logger.isEnabledFor(logging.DEBUG):
             logger.debug(
                 '%s entering fluff mode due to %s.',
-                ''.join('%02x' % ord(i) for i in hashId), reason)
+                hexlify(hashId), reason)
         with self.lock:
             try:
-                del self.hashMap[hashId]
+                del self.hashMap[bytes(hashId)]
             except KeyError:
                 pass
 
     def hasHash(self, hashId):
         """Is inventory vector in stem mode?"""
-        return hashId in self.hashMap
+        return bytes(hashId) in self.hashMap
 
     def objectChildStem(self, hashId):
         """Child (i.e. next) node for an inventory vector during stem mode"""
-        return self.hashMap[hashId].child
+        return self.hashMap[bytes(hashId)].child
 
     def maybeAddStem(self, connection, invQueue):
         """
@@ -111,12 +114,12 @@ class Dandelion:  # pylint: disable=old-style-class
         with self.lock:
             if len(self.stem) < MAX_STEMS:
                 self.stem.append(connection)
-                for k in (k for k, v in self.nodeMap.iteritems() if v is None):
+                for k in (k for k, v in six.iteritems(self.nodeMap) if v is None):
                     self.nodeMap[k] = connection
-                for k, v in {
-                        k: v for k, v in self.hashMap.iteritems()
+                for k, v in six.iteritems({
+                        k: v for k, v in six.iteritems(self.hashMap)
                         if v.child is None
-                }.iteritems():
+                }):
                     self.hashMap[k] = Stem(
                         connection, v.stream, self.poissonTimeout())
                     invQueue.put((v.stream, k, v.child))
@@ -132,14 +135,14 @@ class Dandelion:  # pylint: disable=old-style-class
                 self.stem.remove(connection)
                 # active mappings to pointing to the removed node
                 for k in (
-                        k for k, v in self.nodeMap.iteritems()
+                        k for k, v in six.iteritems(self.nodeMap)
                         if v == connection
                 ):
                     self.nodeMap[k] = None
-                for k, v in {
-                        k: v for k, v in self.hashMap.iteritems()
+                for k, v in six.iteritems({
+                        k: v for k, v in six.iteritems(self.hashMap)
                         if v.child == connection
-                }.iteritems():
+                }):
                     self.hashMap[k] = Stem(
                         None, v.stream, self.poissonTimeout())
 
@@ -180,7 +183,7 @@ class Dandelion:  # pylint: disable=old-style-class
         with self.lock:
             deadline = time()
             toDelete = [
-                [v.stream, k, v.child] for k, v in self.hashMap.iteritems()
+                [v.stream, k, v.child] for k, v in six.iteritems(self.hashMap)
                 if v.timeout < deadline
             ]
 
@@ -199,10 +202,10 @@ class Dandelion:  # pylint: disable=old-style-class
             try:
                 # random two connections
                 self.stem = sample(
-                    self.pool.outboundConnections.values(), MAX_STEMS)
+                    sorted(self.pool.outboundConnections.values()), MAX_STEMS)
             # not enough stems available
             except ValueError:
-                self.stem = self.pool.outboundConnections.values()
+                self.stem = list(self.pool.outboundConnections.values())
             self.nodeMap = {}
             # hashMap stays to cater for pending stems
         self.refresh = time() + REASSIGN_INTERVAL

src/network/downloadthread.py

@@ -4,12 +4,13 @@
 import time
 import random
 import state
+import six
 import addresses
 import protocol
-import connectionpool
+from network import connectionpool
 from network import dandelion_ins
-from objectracker import missingObjects
-from threads import StoppableThread
+from .objectracker import missingObjects
+from .threads import StoppableThread
 
 
 class DownloadThread(StoppableThread):
@@ -29,7 +30,7 @@ class DownloadThread(StoppableThread):
         deadline = time.time() - self.requestExpires
         try:
             toDelete = [
-                k for k, v in missingObjects.iteritems()
+                k for k, v in six.iteritems(missingObjects)
                 if v < deadline]
         except RuntimeError:
             pass
@@ -68,11 +69,11 @@ class DownloadThread(StoppableThread):
                         continue
                     payload.extend(chunk)
                     chunkCount += 1
-                    missingObjects[chunk] = now
+                    missingObjects[bytes(chunk)] = now
                 if not chunkCount:
                     continue
                 payload[0:0] = addresses.encodeVarint(chunkCount)
-                i.append_write_buf(protocol.CreatePacket('getdata', payload))
+                i.append_write_buf(protocol.CreatePacket(b'getdata', payload))
                 self.logger.debug(
                     '%s:%i Requesting %i objects',
                     i.destination.host, i.destination.port, chunkCount)

src/network/http.py

@@ -1,10 +1,10 @@
 import socket
 
-from advanceddispatcher import AdvancedDispatcher
-import asyncore_pollchoose as asyncore
-from proxy import ProxyError
-from socks5 import Socks5Connection, Socks5Resolver
-from socks4a import Socks4aConnection, Socks4aResolver
+from .advanceddispatcher import AdvancedDispatcher
+from network import asyncore_pollchoose as asyncore
+from .proxy import ProxyError
+from .socks5 import Socks5Connection, Socks5Resolver
+from .socks4a import Socks4aConnection, Socks4aResolver
 
 
 class HttpError(ProxyError):

src/network/invthread.py

@@ -1,16 +1,16 @@
 """
 Thread to send inv annoucements
 """
-import Queue
+from six.moves import queue as Queue
 import random
 from time import time
 
 import addresses
 import protocol
 import state
-import connectionpool
+from network import connectionpool
 from network import dandelion_ins, invQueue
-from threads import StoppableThread
+from .threads import StoppableThread
 
 
 def handleExpiredDandelion(expired):
@@ -90,15 +90,15 @@ class InvThread(StoppableThread):
                     if fluffs:
                         random.shuffle(fluffs)
                         connection.append_write_buf(protocol.CreatePacket(
-                            'inv',
+                            b'inv',
                             addresses.encodeVarint(
-                                len(fluffs)) + ''.join(fluffs)))
+                                len(fluffs)) + b''.join(fluffs)))
                     if stems:
                         random.shuffle(stems)
                         connection.append_write_buf(protocol.CreatePacket(
-                            'dinv',
+                            b'dinv',
                             addresses.encodeVarint(
-                                len(stems)) + ''.join(stems)))
+                                len(stems)) + b''.join(stems)))
 
             invQueue.iterate()
             for _ in range(len(chunk)):

src/network/knownnodes.py

@@ -10,10 +10,8 @@ import os
 import pickle  # nosec B403
 import threading
 import time
-try:
-    from collections.abc import Iterable
-except ImportError:
-    from collections import Iterable
+from six.moves.collections_abc import Iterable
+import six
 
 import state
 from bmconfigparser import config
@@ -54,8 +52,8 @@ def json_serialize_knownnodes(output):
     Reorganize knownnodes dict and write it as JSON to output
     """
     _serialized = []
-    for stream, peers in knownNodes.iteritems():
-        for peer, info in peers.iteritems():
+    for stream, peers in six.iteritems(knownNodes):
+        for peer, info in six.iteritems(peers):
             info.update(rating=round(info.get('rating', 0), 2))
             _serialized.append({
                 'stream': stream, 'peer': peer._asdict(), 'info': info
@@ -87,7 +85,7 @@ def pickle_deserialize_old_knownnodes(source):
     global knownNodes
     knownNodes = pickle.load(source)  # nosec B301
     for stream in knownNodes.keys():
-        for node, params in knownNodes[stream].iteritems():
+        for node, params in six.iteritems(knownNodes[stream]):
             if isinstance(params, (float, int)):
                 addKnownNode(stream, node, params)
 
@@ -97,7 +95,7 @@ def saveKnownNodes(dirName=None):
     if dirName is None:
         dirName = state.appdata
     with knownNodesLock:
-        with open(os.path.join(dirName, 'knownnodes.dat'), 'wb') as output:
+        with open(os.path.join(dirName, 'knownnodes.dat'), 'w') as output:
             json_serialize_knownnodes(output)
 
 
@@ -108,6 +106,12 @@ def addKnownNode(stream, peer, lastseen=None, is_self=False):
     Returns True if added a new node.
     """
     # pylint: disable=too-many-branches
+    if not isinstance(peer.host, str):
+        try:
+            peer = Peer(peer.host.decode("ascii"), peer.port)
+        except UnicodeDecodeError as err:
+            logger.warning("Invalid host: {}".format(peer.host.decode("ascii", "backslashreplace")))
+            return
     if isinstance(stream, Iterable):
         with knownNodesLock:
             for s in stream:
@@ -153,7 +157,7 @@ def createDefaultKnownNodes():
 def readKnownNodes():
     """Load knownnodes from filesystem"""
     try:
-        with open(state.appdata + 'knownnodes.dat', 'rb') as source:
+        with open(state.appdata + 'knownnodes.dat', 'r') as source:
             with knownNodesLock:
                 try:
                     json_deserialize_knownnodes(source)

src/network/networkthread.py

@@ -2,9 +2,9 @@
 A thread to handle network concerns
 """
 import network.asyncore_pollchoose as asyncore
-import connectionpool
+from network import connectionpool
 from queues import excQueue
-from threads import StoppableThread
+from .threads import StoppableThread
 
 
 class BMNetworkThread(StoppableThread):

src/network/objectracker.py

@@ -3,8 +3,9 @@ Module for tracking objects
 """
 import time
 from threading import RLock
+import six
 
-import connectionpool
+import network.connectionpool  # use long name to address recursive import
 from network import dandelion_ins
 from randomtrackingdict import RandomTrackingDict
 
@@ -75,32 +76,35 @@ class ObjectTracker(object):
                 with self.objectsNewToThemLock:
                     self.objectsNewToThem = {
                         k: v
-                        for k, v in self.objectsNewToThem.iteritems()
+                        for k, v in six.iteritems(self.objectsNewToThem)
                         if v >= deadline}
             self.lastCleaned = time.time()
 
     def hasObj(self, hashid):
         """Do we already have object?"""
+        hashid_bytes = bytes(hashid)
         if haveBloom:
-            return hashid in self.invBloom
-        return hashid in self.objectsNewToMe
+            return hashid_bytes in self.invBloom
+        return hashid_bytes in self.objectsNewToMe
 
     def handleReceivedInventory(self, hashId):
         """Handling received inventory"""
+        hashId_bytes = bytes(hashId)
         if haveBloom:
-            self.invBloom.add(hashId)
+            self.invBloom.add(hashId_bytes)
         try:
             with self.objectsNewToThemLock:
-                del self.objectsNewToThem[hashId]
+                del self.objectsNewToThem[hashId_bytes]
         except KeyError:
             pass
-        if hashId not in missingObjects:
-            missingObjects[hashId] = time.time()
+        if hashId_bytes not in missingObjects:
+            missingObjects[hashId_bytes] = time.time()
         self.objectsNewToMe[hashId] = True
 
     def handleReceivedObject(self, streamNumber, hashid):
         """Handling received object"""
-        for i in connectionpool.pool.connections():
+        hashid_bytes = bytes(hashid)
+        for i in network.connectionpool.pool.connections():
             if not i.fullyEstablished:
                 continue
             try:
@@ -110,7 +114,7 @@ class ObjectTracker(object):
                         not dandelion_ins.hasHash(hashid)
                         or dandelion_ins.objectChildStem(hashid) == i):
                     with i.objectsNewToThemLock:
-                        i.objectsNewToThem[hashid] = time.time()
+                        i.objectsNewToThem[hashid_bytes] = time.time()
                     # update stream number,
                     # which we didn't have when we just received the dinv
                     # also resets expiration of the stem mode
@@ -119,7 +123,7 @@ class ObjectTracker(object):
             if i == self:
                 try:
                     with i.objectsNewToThemLock:
-                        del i.objectsNewToThem[hashid]
+                        del i.objectsNewToThem[hashid_bytes]
                 except KeyError:
                     pass
         self.objectsNewToMe.setLastObject()
@@ -133,4 +137,4 @@ class ObjectTracker(object):
     def addAddr(self, hashid):
         """WIP, should be moved to addrthread.py or removed"""
         if haveBloom:
-            self.addrBloom.add(hashid)
+            self.addrBloom.add(bytes(hashid))

src/network/proxy.py

@@ -6,14 +6,20 @@ import logging
 import socket
 import time
 
-import asyncore_pollchoose as asyncore
-from advanceddispatcher import AdvancedDispatcher
+from network import asyncore_pollchoose as asyncore
+from .advanceddispatcher import AdvancedDispatcher
 from bmconfigparser import config
-from node import Peer
+from .node import Peer
 
 logger = logging.getLogger('default')
 
 
+def _ends_with(s, tail):
+    try:
+        return s.endswith(tail)
+    except:
+        return s.decode("utf-8", "replace").endswith(tail)
+
 class ProxyError(Exception):
     """Base proxy exception class"""
     errorCodes = ("Unknown error",)
@@ -125,7 +131,7 @@ class Proxy(AdvancedDispatcher):
             self.auth = None
         self.connect(
             self.onion_proxy
-            if address.host.endswith(".onion") and self.onion_proxy else
+            if _ends_with(address.host, ".onion") and self.onion_proxy else
             self.proxy
         )
 

src/network/receivequeuethread.py

@@ -2,13 +2,13 @@
 Process data incoming from network
 """
 import errno
-import Queue
+from six.moves import queue as Queue
 import socket
 
-import connectionpool
+from network import connectionpool
 from network.advanceddispatcher import UnknownStateError
 from network import receiveDataQueue
-from threads import StoppableThread
+from .threads import StoppableThread
 
 
 class ReceiveQueueThread(StoppableThread):

src/network/socks4a.py

@@ -5,8 +5,9 @@ SOCKS4a proxy module
 import logging
 import socket
 import struct
+import six
 
-from proxy import GeneralProxyError, Proxy, ProxyError
+from .proxy import GeneralProxyError, Proxy, ProxyError
 
 logger = logging.getLogger('default')
 
@@ -39,16 +40,16 @@ class Socks4a(Proxy):
     def state_pre_connect(self):
         """Handle feedback from SOCKS4a while it is connecting on our behalf"""
         # Get the response
-        if self.read_buf[0:1] != chr(0x00).encode():
+        if self.read_buf[0:1] != six.int2byte(0x00):
             # bad data
             self.close()
             raise GeneralProxyError(1)
-        elif self.read_buf[1:2] != chr(0x5A).encode():
+        elif self.read_buf[1:2] != six.int2byte(0x5A):
             # Connection failed
             self.close()
-            if ord(self.read_buf[1:2]) in (91, 92, 93):
+            if six.byte2int(self.read_buf[1:2]) in (91, 92, 93):
                 # socks 4 error
-                raise Socks4aError(ord(self.read_buf[1:2]) - 90)
+                raise Socks4aError(six.byte2int(self.read_buf[1:2]) - 90)
             else:
                 raise Socks4aError(4)
         # Get the bound address/port
@@ -102,9 +103,9 @@ class Socks4aConnection(Socks4a):
                 self.append_write_buf(self.ipaddr)
         if self._auth:
             self.append_write_buf(self._auth[0])
-        self.append_write_buf(chr(0x00).encode())
+        self.append_write_buf(six.int2byte(0x00))
         if rmtrslv:
-            self.append_write_buf(self.destination[0] + chr(0x00).encode())
+            self.append_write_buf(self.destination[0].encode("utf-8", "replace") + six.int2byte(0x00))
         self.set_state("pre_connect", length=0, expectBytes=8)
         return True
 
@@ -132,8 +133,8 @@ class Socks4aResolver(Socks4a):
         self.append_write_buf(struct.pack("BBBB", 0x00, 0x00, 0x00, 0x01))
         if self._auth:
             self.append_write_buf(self._auth[0])
-        self.append_write_buf(chr(0x00).encode())
-        self.append_write_buf(self.host + chr(0x00).encode())
+        self.append_write_buf(six.int2byte(0x00))
+        self.append_write_buf(self.host + six.int2byte(0x00))
         self.set_state("pre_connect", length=0, expectBytes=8)
         return True
 

src/network/socks5.py

@@ -6,9 +6,10 @@ SOCKS5 proxy module
 import logging
 import socket
 import struct
+import six
 
-from node import Peer
-from proxy import GeneralProxyError, Proxy, ProxyError
+from .node import Peer
+from .proxy import GeneralProxyError, Proxy, ProxyError
 
 logger = logging.getLogger('default')
 
@@ -97,20 +98,20 @@ class Socks5(Proxy):
     def state_pre_connect(self):
         """Handle feedback from socks5 while it is connecting on our behalf."""
         # Get the response
-        if self.read_buf[0:1] != chr(0x05).encode():
+        if self.read_buf[0:1] != six.int2byte(0x05):
             self.close()
             raise GeneralProxyError(1)
-        elif self.read_buf[1:2] != chr(0x00).encode():
+        elif self.read_buf[1:2] != six.int2byte(0x00):
             # Connection failed
             self.close()
-            if ord(self.read_buf[1:2]) <= 8:
-                raise Socks5Error(ord(self.read_buf[1:2]))
+            if six.byte2int(self.read_buf[1:2]) <= 8:
+                raise Socks5Error(six.byte2int(self.read_buf[1:2]))
             else:
                 raise Socks5Error(9)
         # Get the bound address/port
-        elif self.read_buf[3:4] == chr(0x01).encode():
+        elif self.read_buf[3:4] == six.int2byte(0x01):
             self.set_state("proxy_addr_1", length=4, expectBytes=4)
-        elif self.read_buf[3:4] == chr(0x03).encode():
+        elif self.read_buf[3:4] == six.int2byte(0x03):
             self.set_state("proxy_addr_2_1", length=4, expectBytes=1)
         else:
             self.close()
@@ -129,7 +130,7 @@ class Socks5(Proxy):
         (e.g. IPv6, onion, ...). This is part 1 which retrieves the
         length of the data.
         """
-        self.address_length = ord(self.read_buf[0:1])
+        self.address_length = six.byte2int(self.read_buf[0:1])
         self.set_state(
             "proxy_addr_2_2", length=1, expectBytes=self.address_length)
         return True
@@ -171,19 +172,19 @@ class Socks5Connection(Socks5):
         # use the IPv4 address request even if remote resolving was specified.
         try:
             self.ipaddr = socket.inet_aton(self.destination[0])
-            self.append_write_buf(chr(0x01).encode() + self.ipaddr)
+            self.append_write_buf(six.int2byte(0x01) + self.ipaddr)
         except socket.error:  # may be IPv6!
             # Well it's not an IP number,  so it's probably a DNS name.
             if self._remote_dns:
                 # Resolve remotely
                 self.ipaddr = None
-                self.append_write_buf(chr(0x03).encode() + chr(
-                    len(self.destination[0])).encode() + self.destination[0])
+                self.append_write_buf(six.int2byte(0x03) + six.int2byte(
+                    len(self.destination[0])) + self.destination[0].encode("utf-8", "replace"))
             else:
                 # Resolve locally
                 self.ipaddr = socket.inet_aton(
                     socket.gethostbyname(self.destination[0]))
-                self.append_write_buf(chr(0x01).encode() + self.ipaddr)
+                self.append_write_buf(six.int2byte(0x01) + self.ipaddr)
         self.append_write_buf(struct.pack(">H", self.destination[1]))
         self.set_state("pre_connect", length=0, expectBytes=4)
         return True
@@ -208,8 +209,8 @@ class Socks5Resolver(Socks5):
         """Perform resolving"""
         # Now we can request the actual connection
         self.append_write_buf(struct.pack('BBB', 0x05, 0xF0, 0x00))
-        self.append_write_buf(chr(0x03).encode() + chr(
-            len(self.host)).encode() + str(self.host))
+        self.append_write_buf(six.int2byte(0x03) + six.int2byte(
+            len(self.host)) + bytes(self.host))
         self.append_write_buf(struct.pack(">H", self.port))
         self.set_state("pre_connect", length=0, expectBytes=4)
         return True

src/network/stats.py

@@ -3,9 +3,9 @@ Network statistics
 """
 import time
 
-import asyncore_pollchoose as asyncore
-import connectionpool
-from objectracker import missingObjects
+from network import asyncore_pollchoose as asyncore
+from network import connectionpool
+from .objectracker import missingObjects
 
 
 lastReceivedTimestamp = time.time()

src/network/tcp.py

@@ -8,28 +8,29 @@ import math
 import random
 import socket
 import time
+import six
 
 # magic imports!
 import addresses
 import l10n
 import protocol
 import state
-import connectionpool
+import network.connectionpool  # use long name to address recursive import
 from bmconfigparser import config
 from highlevelcrypto import randomBytes
 from network import dandelion_ins, invQueue, receiveDataQueue
 from queues import UISignalQueue
 from tr import _translate
 
-import asyncore_pollchoose as asyncore
-import knownnodes
+from network import asyncore_pollchoose as asyncore
+from network import knownnodes
 from network.advanceddispatcher import AdvancedDispatcher
 from network.bmproto import BMProto
 from network.objectracker import ObjectTracker
 from network.socks4a import Socks4aConnection
 from network.socks5 import Socks5Connection
 from network.tls import TLSDispatcher
-from node import Peer
+from .node import Peer
 
 
 logger = logging.getLogger('default')
@@ -39,6 +40,12 @@ maximumAgeOfNodesThatIAdvertiseToOthers = 10800  #: Equals three hours
 maximumTimeOffsetWrongCount = 3  #: Connections with wrong time offset
 
 
+def _ends_with(s, tail):
+    try:
+        return s.endswith(tail)
+    except:
+        return s.decode("utf-8", "replace").endswith(tail)
+
 class TCPConnection(BMProto, TLSDispatcher):
     # pylint: disable=too-many-instance-attributes
     """
@@ -138,9 +145,9 @@ class TCPConnection(BMProto, TLSDispatcher):
                 'updateStatusBar',
                 _translate(
                     "MainWindow",
-                    "The time on your computer, %1, may be wrong. "
+                    "The time on your computer, {0}, may be wrong. "
                     "Please verify your settings."
-                ).arg(l10n.formatTimestamp())))
+                ).format(l10n.formatTimestamp())))
 
     def state_connection_fully_established(self):
         """
@@ -191,10 +198,10 @@ class TCPConnection(BMProto, TLSDispatcher):
                     # only if more recent than 3 hours
                     # and having positive or neutral rating
                     filtered = [
-                        (k, v) for k, v in nodes.iteritems()
+                        (k, v) for k, v in six.iteritems(nodes)
                         if v["lastseen"] > int(time.time())
                         - maximumAgeOfNodesThatIAdvertiseToOthers
-                        and v["rating"] >= 0 and not k.host.endswith('.onion')
+                        and v["rating"] >= 0 and not _ends_with(k.host, '.onion')
                     ]
                     # sent 250 only if the remote isn't interested in it
                     elemCount = min(
@@ -220,7 +227,7 @@ class TCPConnection(BMProto, TLSDispatcher):
                 'Sending huge inv message with %i objects to just this'
                 ' one peer', objectCount)
             self.append_write_buf(protocol.CreatePacket(
-                'inv', addresses.encodeVarint(objectCount) + payload))
+                b'inv', addresses.encodeVarint(objectCount) + payload))
 
         # Select all hashes for objects in this stream.
         bigInvList = {}
@@ -267,7 +274,7 @@ class TCPConnection(BMProto, TLSDispatcher):
         self.append_write_buf(
             protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                connectionpool.pool.streams, dandelion_ins.enabled,
+                network.connectionpool.pool.streams, dandelion_ins.enabled,
                 False, nodeid=self.nodeid))
         self.connectedAt = time.time()
         receiveDataQueue.put(self.destination)
@@ -318,7 +325,7 @@ class Socks5BMConnection(Socks5Connection, TCPConnection):
         self.append_write_buf(
             protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                connectionpool.pool.streams, dandelion_ins.enabled,
+                network.connectionpool.pool.streams, dandelion_ins.enabled,
                 False, nodeid=self.nodeid))
         self.set_state("bm_header", expectBytes=protocol.Header.size)
         return True
@@ -342,7 +349,7 @@ class Socks4aBMConnection(Socks4aConnection, TCPConnection):
         self.append_write_buf(
             protocol.assembleVersionMessage(
                 self.destination.host, self.destination.port,
-                connectionpool.pool.streams, dandelion_ins.enabled,
+                network.connectionpool.pool.streams, dandelion_ins.enabled,
                 False, nodeid=self.nodeid))
         self.set_state("bm_header", expectBytes=protocol.Header.size)
         return True
@@ -430,7 +437,7 @@ class TCPServer(AdvancedDispatcher):
 
         state.ownAddresses[Peer(*sock.getsockname())] = True
         if (
-            len(connectionpool.pool)
+            len(network.connectionpool.pool)
             > config.safeGetInt(
                 'bitmessagesettings', 'maxtotalconnections')
                 + config.safeGetInt(
@@ -442,7 +449,7 @@ class TCPServer(AdvancedDispatcher):
             sock.close()
             return
         try:
-            connectionpool.pool.addConnection(
+            network.connectionpool.pool.addConnection(
                 TCPConnection(sock=sock))
         except socket.error:
             pass

src/network/tls.py

@@ -6,6 +6,7 @@ import os
 import socket
 import ssl
 import sys
+import six
 
 import network.asyncore_pollchoose as asyncore
 import paths
@@ -34,7 +35,7 @@ else:
 # ciphers
 if (
     ssl.OPENSSL_VERSION_NUMBER >= 0x10100000
-    and not ssl.OPENSSL_VERSION.startswith(b"LibreSSL")
+    and not ssl.OPENSSL_VERSION.startswith("LibreSSL")
 ):
     sslProtocolCiphers = "AECDH-AES256-SHA@SECLEVEL=0"
 else:
@@ -58,25 +59,45 @@ class TLSDispatcher(AdvancedDispatcher):
         self.tlsDone = False
         self.tlsVersion = "N/A"
         self.isSSL = False
+        if six.PY3 or ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+            self.tlsPrepared = False
 
     def state_tls_init(self):
         """Prepare sockets for TLS handshake"""
         self.isSSL = True
         self.tlsStarted = True
+
+        if six.PY3 or ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+            self.want_read = self.want_write = True
+            self.set_state("tls_handshake")
+            return False
+
+        return self.do_tls_init()
+
+    def do_tls_init(self):
         # Once the connection has been established,
         # it's safe to wrap the socket.
         if sys.version_info >= (2, 7, 9):
-            context = ssl.create_default_context(
-                purpose=ssl.Purpose.SERVER_AUTH
-                if self.server_side else ssl.Purpose.CLIENT_AUTH)
+            if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+                context = ssl.SSLContext(ssl.PROTOCOL_TLS_SERVER
+                    if self.server_side else ssl.PROTOCOL_TLS_CLIENT)
+            else:
+                context = ssl.create_default_context(
+                    purpose=ssl.Purpose.SERVER_AUTH
+                    if self.server_side else ssl.Purpose.CLIENT_AUTH)
             context.set_ciphers(self.ciphers)
             context.set_ecdh_curve("secp256k1")
             context.check_hostname = False
             context.verify_mode = ssl.CERT_NONE
             # also exclude TLSv1 and TLSv1.1 in the future
-            context.options = ssl.OP_ALL | ssl.OP_NO_SSLv2 |\
-                ssl.OP_NO_SSLv3 | ssl.OP_SINGLE_ECDH_USE |\
-                ssl.OP_CIPHER_SERVER_PREFERENCE
+            if ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+                context.options = ssl.OP_ALL | ssl.OP_NO_SSLv2 |\
+                    ssl.OP_NO_SSLv3 | ssl.OP_SINGLE_ECDH_USE |\
+                    ssl.OP_CIPHER_SERVER_PREFERENCE | ssl.OP_NO_TLSv1_3
+            else:
+                context.options = ssl.OP_ALL | ssl.OP_NO_SSLv2 |\
+                    ssl.OP_NO_SSLv3 | ssl.OP_SINGLE_ECDH_USE |\
+                    ssl.OP_CIPHER_SERVER_PREFERENCE
             self.sslSocket = context.wrap_socket(
                 self.socket, server_side=self.server_side,
                 do_handshake_on_connect=False)
@@ -88,7 +109,10 @@ class TLSDispatcher(AdvancedDispatcher):
                 ciphers=self.ciphers, do_handshake_on_connect=False)
         self.sslSocket.setblocking(0)
         self.want_read = self.want_write = True
-        self.set_state("tls_handshake")
+        if six.PY3 or ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+            self.tlsPrepared = True
+        else:
+            self.set_state("tls_handshake")
         return False
 
     @staticmethod
@@ -114,7 +138,9 @@ class TLSDispatcher(AdvancedDispatcher):
             # during TLS handshake, and after flushing write buffer,
             # return status of last handshake attempt
             if self.tlsStarted and not self.tlsDone and not self.write_buf:
-                logger.debug('tls readable, %r', self.want_read)
+                # with OpenSSL 3, excessive logs are spitted
+                if ssl.OPENSSL_VERSION_NUMBER < 0x30000000:
+                    logger.debug('tls readable, %r', self.want_read)
                 return self.want_read
             # prior to TLS handshake,
             # receiveDataThread should emulate synchronous behaviour
@@ -134,6 +160,10 @@ class TLSDispatcher(AdvancedDispatcher):
         try:
             # wait for write buffer flush
             if self.tlsStarted and not self.tlsDone and not self.write_buf:
+                if six.PY3 or ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+                    if not self.tlsPrepared:
+                        self.do_tls_init()
+                        return
                 self.tls_handshake()
             else:
                 AdvancedDispatcher.handle_read(self)
@@ -156,6 +186,10 @@ class TLSDispatcher(AdvancedDispatcher):
         try:
             # wait for write buffer flush
             if self.tlsStarted and not self.tlsDone and not self.write_buf:
+                if six.PY3 or ssl.OPENSSL_VERSION_NUMBER >= 0x30000000:
+                    if not self.tlsPrepared:
+                        self.do_tls_init()
+                        return
                 self.tls_handshake()
             else:
                 AdvancedDispatcher.handle_write(self)

src/network/udp.py

@@ -8,12 +8,12 @@ import time
 # magic imports!
 import protocol
 import state
-import connectionpool
+import network.connectionpool  # use long name to address recursive import
 
 from network import receiveDataQueue
-from bmproto import BMProto
-from node import Peer
-from objectracker import ObjectTracker
+from .bmproto import BMProto
+from .node import Peer
+from .objectracker import ObjectTracker
 
 
 logger = logging.getLogger('default')
@@ -81,8 +81,8 @@ class UDPSocket(BMProto):  # pylint: disable=too-many-instance-attributes
             return True
         remoteport = False
         for seenTime, stream, _, ip, port in addresses:
-            decodedIP = protocol.checkIPAddress(str(ip))
-            if stream not in connectionpool.pool.streams:
+            decodedIP = protocol.checkIPAddress(ip)
+            if stream not in network.connectionpool.pool.streams:
                 continue
             if (seenTime < time.time() - protocol.MAX_TIME_OFFSET
                     or seenTime > time.time() + protocol.MAX_TIME_OFFSET):

src/network/uploadthread.py

@@ -6,10 +6,10 @@ import time
 import random
 import protocol
 import state
-import connectionpool
+from network import connectionpool
 from randomtrackingdict import RandomTrackingDict
 from network import dandelion_ins
-from threads import StoppableThread
+from .threads import StoppableThread
 
 
 class UploadThread(StoppableThread):
@@ -50,7 +50,7 @@ class UploadThread(StoppableThread):
                         break
                     try:
                         payload.extend(protocol.CreatePacket(
-                            'object', state.Inventory[chunk].payload))
+                            b'object', state.Inventory[chunk].payload))
                         chunk_count += 1
                     except KeyError:
                         i.antiIntersectionDelay()

src/plugins/indicator_libmessaging.py

@@ -23,9 +23,9 @@ class IndicatorLibmessaging(object):
             return
 
         self._menu = {
-            'send': unicode(_translate('MainWindow', 'Send')),
-            'messages': unicode(_translate('MainWindow', 'Messages')),
-            'subscriptions': unicode(_translate('MainWindow', 'Subscriptions'))
+            'send': _translate('MainWindow', 'Send'),
+            'messages': _translate('MainWindow', 'Messages'),
+            'subscriptions': _translate('MainWindow', 'Subscriptions')
         }
 
         self.new_message_item = self.new_broadcast_item = None
@@ -45,12 +45,11 @@ class IndicatorLibmessaging(object):
 
     def show_unread(self, draw_attention=False):
         """
-        show the number of unread messages and subscriptions
+        Show the number of unread messages and subscriptions
         on the messaging menu
         """
         for source, count in zip(
-                ('messages', 'subscriptions'),
-                self.form.getUnread()
+            ('messages', 'subscriptions'), self.form.getUnread()
         ):
             if count > 0:
                 if self.app.has_source(source):

src/plugins/menu_qrcode.py

@@ -3,10 +3,10 @@
 A menu plugin showing QR-Code for bitmessage address in modal dialog.
 """
 
-import urllib
+from six.moves.urllib.parse import urlencode
 
 import qrcode
-from PyQt4 import QtCore, QtGui
+from qtpy import QtGui, QtCore, QtWidgets
 
 from pybitmessage.tr import _translate
 
@@ -39,23 +39,23 @@ class Image(qrcode.image.base.BaseImage):  # pylint: disable=abstract-method
             QtCore.Qt.black)
 
 
-class QRCodeDialog(QtGui.QDialog):
+class QRCodeDialog(QtWidgets.QDialog):
     """The dialog"""
     def __init__(self, parent):
         super(QRCodeDialog, self).__init__(parent)
-        self.image = QtGui.QLabel(self)
-        self.label = QtGui.QLabel(self)
+        self.image = QtWidgets.QLabel(self)
+        self.label = QtWidgets.QLabel(self)
         font = QtGui.QFont()
         font.setBold(True)
         font.setWeight(75)
         self.label.setFont(font)
         self.label.setAlignment(
             QtCore.Qt.AlignLeft | QtCore.Qt.AlignVCenter)
-        buttonBox = QtGui.QDialogButtonBox(self)
+        buttonBox = QtWidgets.QDialogButtonBox(self)
         buttonBox.setOrientation(QtCore.Qt.Horizontal)
-        buttonBox.setStandardButtons(QtGui.QDialogButtonBox.Ok)
+        buttonBox.setStandardButtons(QtWidgets.QDialogButtonBox.Ok)
         buttonBox.accepted.connect(self.accept)
-        layout = QtGui.QVBoxLayout(self)
+        layout = QtWidgets.QVBoxLayout(self)
         layout.addWidget(self.image)
         layout.addWidget(self.label)
         layout.addWidget(buttonBox)
@@ -72,7 +72,7 @@ class QRCodeDialog(QtGui.QDialog):
         self.label.setText(text)
         self.label.setToolTip(text)
         self.label.setFixedWidth(pixmap.width())
-        self.setFixedSize(QtGui.QWidget.sizeHint(self))
+        self.setFixedSize(QtWidgets.QWidget.sizeHint(self))
 
 
 def connect_plugin(form):
@@ -93,7 +93,7 @@ def connect_plugin(form):
                 return
         dialog.render(
             'bitmessage:%s' % account.address + (
-                '?' + urllib.urlencode({'label': label.encode('utf-8')})
+                '?' + urlencode({'label': label.encode('utf-8')})
                 if label != account.address else '')
         )
         dialog.exec_()