Merge pull request #14 from navjotcis/UiChanges

code quality stuff fixes with enhancement in kivy app

src/bitmessagekivy/android/python-for-android/recipes/kivymd/__init__.py

@@ -1,24 +1,28 @@
-from os import environ
+"""
-from os.path import exists, join
+src/bitmessagekivy/android/python-for-android/recipes/kivymd/__init__.py
+=================================
+"""
+# pylint: disable=import-error
+from os.path import join
 
-import sh
-from pythonforandroid.logger import shprint, info_main, info
 from pythonforandroid.recipe import PythonRecipe
 # from pythonforandroid.util import ensure_dir
 
 
 class KivyMDRecipe(PythonRecipe):
-    # This recipe installs KivyMD into the android dist from source
+    """This recipe installs KivyMD into the android dist from source"""
     version = 'master'
     url = 'https://github.com/surbhicis/kivymd/archive/master.zip'
     depends = ['kivy']
     site_packages_name = 'kivymd'
     call_hostpython_via_targetpython = False
 
-    def should_build(self, arch):
+    def should_build(self, arch):    # pylint: disable=no-self-use, unused-argument
+        """Method helps to build the application"""
         return True
 
     def get_recipe_env(self, arch):
+        """Method is used for getting all the env paths"""
         env = super(KivyMDRecipe, self).get_recipe_env(arch)
         env['PYTHON_ROOT'] = self.ctx.get_python_install_dir()
         env['CFLAGS'] += ' -I' + env['PYTHON_ROOT'] + '/include/python2.7'
@@ -30,8 +34,7 @@ class KivyMDRecipe(PythonRecipe):
                 join(self.ctx.bootstrap.build_dir, 'jni', 'SDL', 'include'),
                 join(self.ctx.bootstrap.build_dir, 'jni', 'SDL2_image'),
                 join(self.ctx.bootstrap.build_dir, 'jni', 'SDL2_mixer'),
-                join(self.ctx.bootstrap.build_dir, 'jni', 'SDL2_ttf'),
+                join(self.ctx.bootstrap.build_dir, 'jni', 'SDL2_ttf'), ])
-                ])
         return env
 
 

src/bitmessagekivy/identiconGeneration.py

@@ -2,11 +2,13 @@
 src/identiconGeneration.py
 =================================
 """
+# pylint: disable=import-error
 import hashlib
+from io import BytesIO
+
 from PIL import Image
 from kivy.core.image import Image as CoreImage
 from kivy.uix.image import Image as kiImage
-from io import BytesIO
 """ Core classes for loading images and converting them to a Texture.
 The raw image data can be keep in memory for further access """
 

src/bitmessagekivy/kivy_helper_search.py

@@ -1,7 +1,13 @@
-from helper_sql import *
+"""
+src/bitmessagekivy/kivy_helper_search.py
+=================================
+"""
+from helper_sql import sqlQuery
 
 
 def search_sql(xAddress="toaddress", account=None, folder="inbox", where=None, what=None, unreadOnly=False):
+    """Method helping for searching mails"""
+    # pylint: disable=too-many-arguments, too-many-branches
     if what is not None and what != "":
         what = "%" + what + "%"
     else:
@@ -27,7 +33,7 @@ def search_sql(xAddress="toaddress", account=None, folder="inbox", where=None, w
         else:
             sqlStatementParts.append(xAddress + " = ? ")
             sqlArguments.append(account)
-    if folder is not "addressbook":
+    if folder != "addressbook":
         if folder is not None:
             if folder == "new":
                 folder = "inbox"
@@ -50,7 +56,7 @@ def search_sql(xAddress="toaddress", account=None, folder="inbox", where=None, w
         sqlStatementParts.append(filter_col)
     if unreadOnly:
         sqlStatementParts.append("read = 0")
-    if len(sqlStatementParts) > 0:
+    if sqlStatementParts:
         sqlStatementBase += "WHERE " + " AND ".join(sqlStatementParts)
     if folder == "sent":
         sqlStatementBase += " ORDER BY lastactiontime DESC"

src/bitmessagekivy/main.kv

@@ -72,9 +72,9 @@
             on_text:app.getCurrentAccountData(self.text)
             Image:
                 source: app.get_default_image()
-                x: self.width/4-2
+                x: self.width/6
-                y: self.parent.y + self.parent.height/2 - self.height + 14
+                y: self.parent.y + self.parent.height/4
-                size: 28, 28
+                size: self.parent.height/2, self.parent.height/2
             ArrowImg:
     NavigationDrawerIconButton:
         id: inbox_cnt
@@ -82,52 +82,52 @@
         text: "Inbox"
         on_release: app.root.ids.scr_mngr.current = 'inbox'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton:
         id: send_cnt
         icon: 'send'
         text: "Sent"
         on_release: app.root.ids.scr_mngr.current = 'sent'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton:
         id: draft_cnt
         icon: 'message-draw'
         text: "Draft"
         on_release: app.root.ids.scr_mngr.current = 'draft'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton: 
         text: "Starred"
         icon:'star'
         on_release: app.root.ids.scr_mngr.current = 'starred'
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton:
         icon: 'archive'
         text: "Archieve"
         on_release: app.root.ids.scr_mngr.current = 'archieve'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton:
         icon: 'email-open-outline'
         text: "Spam"
         on_release: app.root.ids.scr_mngr.current = 'spam'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton:
         id: trash_cnt
         icon: 'delete'
         text: "Trash"
         on_release: app.root.ids.scr_mngr.current = 'trash'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton:
         id: allmail_cnt
         text: "All Mails"
         icon:'contact-mail'
         on_release: app.root.ids.scr_mngr.current = 'allmails'
         badge_text: "0"
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerDivider:
     NavigationDrawerSubheader:
         text: "All labels"
@@ -135,37 +135,37 @@
         text: "Address Book"
         icon:'book-multiple'
         on_release: app.root.ids.scr_mngr.current = 'addressbook' 
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton: 
         text: "Settings"
         icon:'settings'
         on_release: app.root.ids.scr_mngr.current = 'set'
-        on_press: app.check_search_screen(self)                                   
+        on_press: app.refreshScreen(self)                                   
     NavigationDrawerIconButton: 
         text: "Subscriptions/Payment"
         icon:'wallet'
         on_release: app.root.ids.scr_mngr.current = 'payment'
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton: 
         text: "Credits"
         icon:'wallet'
         on_release: app.root.ids.scr_mngr.current = 'credits'
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton: 
         text: "new address"
         icon:'account-plus'
         on_release: app.root.ids.scr_mngr.current = 'login'
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton: 
         text: "Network Status"
         icon:'server-network'
         on_release: app.root.ids.scr_mngr.current = 'networkstat'
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
     NavigationDrawerIconButton: 
         text: "My Addresses"
         icon:'account-multiple'
         on_release: app.root.ids.scr_mngr.current = 'myaddress'
-        on_press: app.check_search_screen(self)
+        on_press: app.refreshScreen(self)
 
 NavigationLayout:
     id: nav_layout
@@ -186,18 +186,6 @@ NavigationLayout:
             background_hue: '500'
             left_action_items: [['menu', lambda x: app.root.toggle_nav_drawer()]]
             right_action_items: [['account-plus', lambda x: app.addingtoaddressbook()]]
-        BoxLayout:
-            id: search_bar
-            size_hint_y: None
-            height: self.minimum_height
-
-            MDIconButton:
-                icon: 'magnify'
-
-            MDTextField:
-                id: search_field
-                hint_text: 'Search'
-                on_text: app.searchQuery(self)
 
         ScreenManager:
             id: scr_mngr
@@ -246,6 +234,10 @@ NavigationLayout:
 
 <Inbox>:
     name: 'inbox'
+    BoxLayout:
+        orientation: 'vertical'
+        spacing: dp(10)
+        SearchBar:
         FloatLayout:
             MDScrollViewRefreshLayout:
                 id: refresh_layout
@@ -257,6 +249,11 @@ NavigationLayout:
 
 <Sent>:
     name: 'sent'
+    BoxLayout:
+        orientation: 'vertical'
+        SearchBar:
+        BoxLayout:
+            orientation:'vertical'
             ScrollView:
                 do_scroll_x: False
                 MDList:
@@ -654,6 +651,9 @@ NavigationLayout:
 
 <MyAddress>:
     name: 'myaddress'
+    BoxLayout:
+        orientation: 'vertical'
+        SearchBar:
         FloatLayout:
             MDScrollViewRefreshLayout:
                 id: refresh_layout
@@ -665,6 +665,9 @@ NavigationLayout:
 
 <AddressBook>:
     name: 'addressbook'
+    BoxLayout:
+        orientation: 'vertical'
+        SearchBar:
         BoxLayout:
             orientation:'vertical'
             ScrollView:
@@ -821,11 +824,13 @@ NavigationLayout:
 
 <GrashofPopup>:
     id: popup
+    size_hint : (None,None)
+    height: 2*(label.height + address.height) + 10
+    width :app.window_size[0] - app.window_size[0]/10
     title: 'add contact\'s'
     background: './images/popup.jpeg'
     title_size: sp(20)
     title_color: 0.4, 0.3765, 0.3451, 1
-    size_hint: 1, 1
     auto_dismiss: False
     separator_color: 0.3529, 0.3922, 0.102, 0.7
     BoxLayout:
@@ -1050,19 +1055,23 @@ NavigationLayout:
 
 <MyaddDetailPopup>:
     id: myadd_popup
+    size_hint : (None,None)
+    height: 4.5*(myaddr_label.height+ my_add_btn.children[0].height)
+    width :app.window_size[0] - app.window_size[0]/10
     background: './images/popup.jpeg'
-    separator_height: 0 
     auto_dismiss: False
+    separator_height: 0 
     BoxLayout:
+        id: myadd_popup_box
         size_hint_y: None
         spacing:dp(70)
-        id: myadd_popup_box
         orientation: 'vertical'
         BoxLayout:
             size_hint_y: None
             orientation: 'vertical'
             spacing:dp(25)
             MDLabel:
+                id: myaddr_label
                 font_style: 'Title'
                 theme_text_color: 'Primary'
                 text: "Label"
@@ -1087,6 +1096,7 @@ NavigationLayout:
                 font_size: '15sp'
                 halign: 'left'
         BoxLayout:
+            id: my_add_btn
             spacing:5
             orientation: 'horizontal'
             MDRaisedButton:
@@ -1125,6 +1135,9 @@ NavigationLayout:
 
 <AddbookDetailPopup>:
     id: addbook_popup
+    size_hint : (None,None)
+    height: 4*(add_label.height)
+    width :app.window_size[0] - app.window_size[0]/10
     background: './images/popup.jpeg'
     separator_height: 0 
     auto_dismiss: False
@@ -1165,6 +1178,7 @@ NavigationLayout:
                 font_size: '15sp'
                 halign: 'left'
         BoxLayout:
+            id: addbook_btn
             spacing:5
             orientation: 'horizontal'
             MDRaisedButton:
@@ -1212,3 +1226,17 @@ NavigationLayout:
     size: 15, 15
     x: self.parent.x + self.parent.width - self.width - 5
     y: self.parent.y + self.parent.height/2 - self.height + 5
+
+
+<SearchBar@BoxLayout>:
+    id: search_bar
+    size_hint_y: None
+    height: self.minimum_height
+
+    MDIconButton:
+        icon: 'magnify'
+
+    MDTextField:
+        id: search_field
+        hint_text: 'Search'
+        on_text: app.searchQuery(self)

src/bitmessagekivy/mpybit.py

@@ -2,6 +2,7 @@
 src/bitmessagekivy/mpybit.py
 =================================
 """
+# pylint: disable=relative-import, unused-variable, import-error, no-name-in-module, too-many-lines
 import os
 import time
 from functools import partial
@@ -42,24 +43,19 @@ from kivymd.list import (
     ILeftBody,
     ILeftBodyTouch,
     IRightBodyTouch,
-    ThreeLineAvatarIconListItem,
     TwoLineAvatarIconListItem,
     TwoLineListItem)
 from kivymd.navigationdrawer import (
     MDNavigationDrawer,
     NavigationDrawerHeaderBase)
 from kivymd.selectioncontrols import MDCheckbox
-from kivymd.textfields import MDTextField
 from kivymd.theming import ThemeManager
 import queues
 from semaphores import kivyuisignaler
 import state
 from uikivysignaler import UIkivySignaler
-# pylint: disable=unused-argument, too-few-public-methods, import-error
 
 import identiconGeneration
-import os
-from kivy.core.clipboard import Clipboard
 # pylint: disable=unused-argument, too-few-public-methods
 
 
@@ -82,8 +78,6 @@ class Navigatorss(MDNavigationDrawer):
 class Inbox(Screen):
     """Inbox Screen uses screen to show widgets of screens."""
 
-    data = ListProperty()
-
     def __init__(self, *args, **kwargs):
         """Method Parsing the address."""
         super(Inbox, self).__init__(*args, **kwargs)
@@ -171,7 +165,6 @@ class Inbox(Screen):
 
     def inbox_detail(self, receivedTime, *args):
         """Load inbox page details."""
-        remove_search_bar(self)
         state.detailPageType = 'inbox'
         state.sentMailTime = receivedTime
         if self.manager:
@@ -187,6 +180,10 @@ class Inbox(Screen):
         sqlExecute(
             "UPDATE inbox SET folder = 'trash' WHERE received = {};".format(
                 data_index))
+        try:
+            msg_count_objs = \
+                self.parent.parent.parent.parent.children[2].children[0].ids
+        except Exception as e:
             msg_count_objs = \
                 self.parent.parent.parent.parent.parent.children[2].children[0].ids
         if int(state.inbox_count) > 0:
@@ -229,13 +226,10 @@ class Inbox(Screen):
         """Method updates the state of application, While the spinner remains on the screen."""
         def refresh_callback(interval):
             """Method used for loading the inbox screen data."""
+            state.searcing_text = ''
+            self.children[2].children[1].ids.search_field.text = ''
             self.ids.ml.clear_widgets()
-            self.remove_widget(self.children[1])
+            self.loadMessagelist(state.association)
-            try:
-                screens_obj = self.parent.screens[0]
-            except Exception:
-                screens_obj = self.parent.parent.screens[0]
-            screens_obj.add_widget(Inbox())
             self.ids.refresh_layout.refresh_done()
             self.tick = 0
 
@@ -287,9 +281,8 @@ class MyAddress(Screen):
                 size_hint_y=None,
                 valign='top')
             self.ids.ml.add_widget(content)
+            if not state.searcing_text:
                 try:
-                self.manager.parent.parent\
-                    .parent.ids.search_bar.clear_widgets()
                     self.manager.current = 'login'
                 except Exception:
                     pass
@@ -306,13 +299,10 @@ class MyAddress(Screen):
         """Method updates the state of application, While the spinner remains on the screen."""
         def refresh_callback(interval):
             """Method used for loading the myaddress screen data."""
+            state.searcing_text = ''
+            self.children[2].children[1].ids.search_field.text = ''
             self.ids.ml.clear_widgets()
-            self.remove_widget(self.children[1])
+            self.init_ui()
-            try:
-                screens_obj = self.parent.screens[9]
-            except Exception:
-                screens_obj = self.parent.parent.screens[9]
-            screens_obj.add_widget(MyAddress())
             self.ids.refresh_layout.refresh_done()
             self.tick = 0
         Clock.schedule_once(refresh_callback, 1)
@@ -389,8 +379,8 @@ class AddressBook(Screen):
     @staticmethod
     def refreshs(*args):
         """Refresh the Widget."""
-        state.navinstance.ids.sc11.clear_widgets()
+        state.navinstance.ids.sc11.ids.ml.clear_widgets()
-        state.navinstance.ids.sc11.add_widget(AddressBook())
+        state.navinstance.ids.sc11.loadAddresslist(None, 'All', '')
 
     @staticmethod
     def addBook_detail(address, label, *args):
@@ -526,8 +516,8 @@ class DropDownWidget(BoxLayout):
                     state.check_sent_acc = fromAddress
                     state.msg_counter_objs = self.parent.parent.parent.parent\
                         .parent.parent.children[0].children[2].children[0].ids
-                    self.parent.parent.screens[3].clear_widgets()
+                    self.parent.parent.screens[3].ids.ml.clear_widgets()
-                    self.parent.parent.screens[3].add_widget(Sent())
+                    self.parent.parent.screens[3].loadSent(state.association)
                     self.parent.parent.screens[16].clear_widgets()
                     self.parent.parent.screens[16].add_widget(Allmails())
                     toLabel = ''
@@ -704,9 +694,8 @@ class Random(Screen):
             self.ids.label.text = ''
             self.parent.parent.parent.parent.ids.toolbar.opacity = 1
             self.parent.parent.parent.parent.ids.toolbar.disabled = False
-            self.parent.parent.parent.parent.ids.sc10.clear_widgets()
+            self.parent.parent.parent.parent.ids.sc10.ids.ml.clear_widgets()
-            self.parent.parent.parent.parent.ids.sc10.add_widget(MyAddress())
+            self.parent.parent.parent.parent.ids.sc10.init_ui()
-            navApp.add_search_bar()
             toast('New address created')
 
 
@@ -718,9 +707,6 @@ class AddressSuccessful(Screen):
 
 class Sent(Screen):
     """Sent Screen uses screen to show widgets of screens."""
-
-    data = ListProperty()
-
     def __init__(self, *args, **kwargs):
         """Association with the screen."""
         super(Sent, self).__init__(*args, **kwargs)
@@ -745,6 +731,7 @@ class Sent(Screen):
             where = ['subject', 'message']
             what = state.searcing_text
         xAddress = 'fromaddress'
+        data = []
         queryreturn = kivy_helper_search.search_sql(
             xAddress, account, "sent", where, what, False)
         if state.msg_counter_objs and state.association == \
@@ -760,13 +747,13 @@ class Sent(Screen):
             src_mng_obj.send_cnt.badge_text = str(len(queryreturn))
             state.sent_count = str(len(queryreturn))
             for mail in queryreturn:
-                self.data.append({
+                data.append({
                     'text': mail[1].strip(),
                     'secondary_text': mail[2][:50] + '........' if len(
                         mail[2]) >= 50 else (
                             mail[2] + ',' + mail[3].replace('\n', ''))[0:50] + '........',
                     'lastactiontime': mail[6]})
-            for item in self.data:
+            for item in data:
                 meny = TwoLineAvatarIconListItem(
                     text=item['text'],
                     secondary_text=item['secondary_text'],
@@ -811,7 +798,6 @@ class Sent(Screen):
 
     def sent_detail(self, lastsenttime, *args):
         """Load sent mail details."""
-        remove_search_bar(self)
         state.detailPageType = 'sent'
         state.sentMailTime = lastsenttime
         if self.manager:
@@ -1034,16 +1020,9 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
             BMConfigParser().get(text, 'label'), text)
         self.root_window.children[1].ids.toolbar.title = address_label
         state.association = text
-        self.root.ids.sc1.clear_widgets()
+        state.searcing_text = ''
-        self.root.ids.sc1.add_widget(Inbox())
+        self.root.ids.sc1.ids.ml.clear_widgets()
-        # self.root.ids.sc4.clear_widgets()
+        self.root.ids.sc1.loadMessagelist(state.association)
-        # self.root.ids.sc5.clear_widgets()
-        # self.root.ids.sc16.clear_widgets()
-        # self.root.ids.sc17.clear_widgets()
-        # self.root.ids.sc4.add_widget(Sent())
-        # self.root.ids.sc5.add_widget(Trash())
-        # self.root.ids.sc16.add_widget(Draft())
-        # self.root.ids.sc17.add_widget(Allmails())
         self.root.ids.scr_mngr.current = 'inbox'
 
         msg_counter_objs = \
@@ -1091,6 +1070,12 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
         if BMConfigParser().addresses():
             img = identiconGeneration.generate(BMConfigParser().addresses()[0])
             self.createFolder('./images/default_identicon/')
+            if platform == 'android':
+                # android_path = os.path.expanduser("~/user/0/org.test.bitapp/files/app/")
+                android_path = os.path.join(os.environ['ANDROID_PRIVATE'] + '/app/')
+                img.texture.save('{1}/images/default_identicon/{0}.png'.format(
+                    BMConfigParser().addresses()[0], android_path))
+            else:
                 img.texture.save('./images/default_identicon/{}.png'.format(BMConfigParser().addresses()[0]))
             return BMConfigParser().addresses()[0]
         return 'Select Address'
@@ -1125,8 +1110,6 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
                 self.root.ids.scr_mngr.current = 'sent'\
                     if state.detailPageType == 'sent' else 'inbox' \
                     if state.detailPageType == 'inbox' else 'draft'
-                # if state.detailPageType in ['sent', 'inbox']:
-                #     self.add_search_bar()
                 self.back_press()
             elif self.root.ids.scr_mngr.current == "create":
                 composer_objs = self.root
@@ -1142,7 +1125,6 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
                 self.root.ids.scr_mngr.current = 'login'
             else:
                 self.root.ids.scr_mngr.current = 'inbox'
-                self.add_search_bar()
             self.root.ids.scr_mngr.transition.direction = 'right'
             self.root.ids.scr_mngr.transition.bind(on_complete=self.reset)
             return True
@@ -1162,7 +1144,7 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
     def clear_composer(self):
         """If slow down the nwe will make new composer edit screen."""
         self.set_navbar_for_composer()
-        self.root.ids.search_bar.clear_widgets()
+        # self.root.ids.search_bar.clear_widgets()
         composer_obj = self.root.ids.sc3.children[0].ids
         composer_obj.ti.text = ''
         composer_obj.btn.text = 'Select'
@@ -1190,8 +1172,6 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
         self.root.ids.scr_mngr.transition.bind(on_complete=self.reset)
         if state.is_allmail or state.detailPageType == 'draft':
             state.is_allmail = False
-        else:
-            self.add_search_bar()
         state.detailPageType = ''
         state.in_composer = False
 
@@ -1218,66 +1198,60 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
             return label + address
         return ''
 
-    def searchQuery(self, instance, *args):
+    def searchQuery(self, instance):
         """Method used for showing searched mails."""
         state.search_screen = self.root.ids.scr_mngr.current
         state.searcing_text = str(instance.text).strip()
         if state.search_screen == 'inbox':
-            self.root.ids.sc1.clear_widgets()
+            self.root.ids.sc1.ids.ml.clear_widgets()
-            self.root.ids.sc1.add_widget(Inbox())
+            self.root.ids.sc1.loadMessagelist(state.association)
         elif state.search_screen == 'addressbook':
-            self.root.ids.sc11.clear_widgets()
+            self.root.ids.sc11.ids.ml.clear_widgets()
-            self.root.ids.sc11.add_widget(AddressBook())
+            self.root.ids.sc11.loadAddresslist(None, 'All', '')
         elif state.search_screen == 'myaddress':
-            self.root.ids.sc10.clear_widgets()
+            self.root.ids.sc10.ids.ml.clear_widgets()
-            self.root.ids.sc10.add_widget(MyAddress())
+            self.root.ids.sc10.init_ui()
         else:
-            self.root.ids.sc4.clear_widgets()
+            self.root.ids.sc4.ids.ml.clear_widgets()
-            self.root.ids.sc4.add_widget(Sent())
+            self.root.ids.sc4.loadSent(state.association)
         self.root.ids.scr_mngr.current = state.search_screen
 
-    def clearSreeen(self, text):
+    def refreshScreen(self, instance):
-        """Method is used for clear screen"""
+        """Method show search button only on inbox or sent screen."""
-        if text == 'Sent':
+        state.searcing_text = ''
-            self.root.ids.sc4.clear_widgets()
+        if instance.text == 'Sent':
-            self.root.ids.sc4.add_widget(Sent())
+            self.root.ids.sc4.ids.ml.clear_widgets()
-        elif text == 'Draft':
+            self.root.ids.sc4.children[1].children[1].ids.search_field.text = ''
+            self.root.ids.sc4.loadSent(state.association)
+        elif instance.text == 'Inbox':
+            self.root.ids.sc1.ids.ml.clear_widgets()
+            try:
+                self.root.ids.sc1.children[2].children[1].ids.search_field.text = ''
+            except Exception as e:
+                self.root.ids.sc1.children[1].children[1].ids.search_field.text = ''
+            self.root.ids.sc1.loadMessagelist(state.association)
+        elif instance.text == 'Draft':
             self.root.ids.sc16.clear_widgets()
             self.root.ids.sc16.add_widget(Draft())
-        elif text == 'Trash':
+        elif instance.text == 'Trash':
             self.root.ids.sc5.clear_widgets()
             self.root.ids.sc5.add_widget(Trash())
-        elif text == 'All Mails':
+        elif instance.text == 'All Mails':
             self.root.ids.sc17.clear_widgets()
             self.root.ids.sc17.add_widget(Allmails())
-
+        elif instance.text == 'Address Book':
-    def check_search_screen(self, instance):
+            self.root.ids.sc11.ids.ml.clear_widgets()
-        """Method show search button only on inbox or sent screen."""
+            self.root.ids.sc11.children[1].children[1].ids.search_field.text = ''
-        if instance.text in ['Sent', 'Draft', 'Trash', 'All Mails']:
+            self.root.ids.sc11.loadAddresslist(None, 'All', '')
-            self.clearSreeen(instance.text)
+        elif instance.text == 'My Addresses':
-        if instance.text in ['Inbox', 'Sent', 'Address Book', 'My Addresses']:
+            self.root.ids.sc10.ids.ml.clear_widgets()
-            if not self.root.ids.search_bar.children:
+            try:
-                self.root.ids.search_bar.add_widget(
+                self.root.ids.sc10.children[1].children[1].ids.search_field.text = ''
-                    MDIconButton(icon='magnify'))
+            except Exception as e:
-                text_field = MDTextField(
+                self.root.ids.sc10.children[2].children[1].ids.search_field.text = ''
-                    id='search_field', hint_text='Search')
+            self.root.ids.sc10.init_ui()
-                text_field.bind(text=self.searchQuery)
-                self.root.ids.search_bar.add_widget(text_field)
-            self.root.ids.search_bar.children[0].text = ''
-        else:
-            self.root.ids.search_bar.clear_widgets()
-        state.searcing_text = ''
         return
 
-    def add_search_bar(self):
-        """Method used for adding search function on screen"""
-        if not self.root.ids.search_bar.children:
-            self.root.ids.search_bar.add_widget(MDIconButton(icon='magnify'))
-            text_field = MDTextField(
-                id='search_field', hint_text='Search')
-            text_field.bind(text=self.searchQuery)
-            self.root.ids.search_bar.add_widget(text_field)
-
     def set_identicon(self, text):
         """This method is use for showing identicon in address spinner"""
         img = identiconGeneration.generate(text)
@@ -1306,16 +1280,9 @@ class NavigateApp(App):     # pylint: disable=too-many-public-methods
 class GrashofPopup(Popup):
     """Methods for saving contacts, error messages."""
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs):    # pylint: disable=useless-super-delegation
         """Grash of pop screen settings."""
         super(GrashofPopup, self).__init__(**kwargs)
-        print("sssssssssssssssssssiiiiiiiiiiiiiiizzzzzzzzzzeeeeee...............", state.screen_density)
-        if state.screen_density[0] <= 720:
-            self.size_hint_y = 0.4
-            self.size_hint_x = 0.9
-        else:
-            self.size_hint_y = 0.42
-            self.size_hint_x = 0.7
 
     def savecontact(self):
         """Method is used for Saving Contacts."""
@@ -1430,7 +1397,7 @@ class NavigationDrawerTwoLineListItem(
     def _update_specific_text_color(self, instance, value):
         pass
 
-    def _set_active(self, active, list):        # pylint: disable=redefined-builtin
+    def _set_active(self, active, list_):
         pass
 
 
@@ -1491,8 +1458,8 @@ class MailDetail(Screen):
                 lastactiontime = {};".format(state.sentMailTime))
             msg_count_objs.send_cnt.badge_text = str(int(state.sent_count) - 1)
             state.sent_count = str(int(state.sent_count) - 1)
-            self.parent.screens[3].clear_widgets()
+            self.parent.screens[3].ids.ml.clear_widgets()
-            self.parent.screens[3].add_widget(Sent())
+            self.parent.screens[3].loadSent(state.association)
         elif state.detailPageType == 'inbox':
             sqlExecute(
                 "UPDATE inbox SET folder = 'trash' WHERE \
@@ -1500,8 +1467,8 @@ class MailDetail(Screen):
             # msg_count_objs.inbox_cnt.badge_text = str(
             # int(state.inbox_count) - 1)
             # state.inbox_count = str(int(state.inbox_count) - 1)
-            self.parent.screens[0].clear_widgets()
+            self.parent.screens[0].ids.ml.clear_widgets()
-            self.parent.screens[0].add_widget(Inbox())
+            self.parent.screens[0].loadMessagelist(state.association)
         elif state.detailPageType == 'draft':
             sqlExecute("DELETE FROM  sent WHERE lastactiontime = '{}';".format(
                 state.sentMailTime))
@@ -1533,6 +1500,7 @@ class MailDetail(Screen):
         composer_obj.btn.text = data[0][0]
         composer_obj.txt_input.text = data[0][1]
         composer_obj.subject.text = data[0][2]
+        composer_obj.body.text = ''
         state.kivyapp.root.ids.sc3.children[0].ids.rv.data = ''
         self.parent.current = 'create'
         state.kivyapp.set_navbar_for_composer()
@@ -1571,15 +1539,9 @@ class MyaddDetailPopup(Popup):
     address_label = StringProperty()
     address = StringProperty()
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs):    # pylint: disable=useless-super-delegation
         """My Address Details screen setting."""
         super(MyaddDetailPopup, self).__init__(**kwargs)
-        if state.screen_density[0] <= 720:
-            self.size_hint_y = 0.32
-            self.size_hint_x = 0.9
-        else:
-            self.size_hint_y = 0.32
-            self.size_hint_x = 0.7
 
     def set_address(self, address, label):
         """Getting address for displaying details on popup."""
@@ -1609,15 +1571,9 @@ class AddbookDetailPopup(Popup):
     address_label = StringProperty()
     address = StringProperty()
 
-    def __init__(self, **kwargs):
+    def __init__(self, **kwargs):    # pylint: disable=useless-super-delegation
         """Method used set screen of address detail page."""
         super(AddbookDetailPopup, self).__init__(**kwargs)
-        if state.screen_density[0] <= 720:
-            self.size_hint_y = 0.35
-            self.size_hint_x = 0.95
-        else:
-            self.size_hint_y = 0.35
-            self.size_hint_x = 0.7
 
     def set_addbook_data(self, address, label):
         """Getting address book data for detial dipaly."""
@@ -1629,8 +1585,8 @@ class AddbookDetailPopup(Popup):
         if str(self.ids.add_label.text):
             sqlExecute("UPDATE addressbook SET label = '{}' WHERE \
                 address = '{}';".format(str(self.ids.add_label.text), address))
-            self.parent.children[1].ids.sc11.clear_widgets()
+            self.parent.children[1].ids.sc11.ids.ml.clear_widgets()
-            self.parent.children[1].ids.sc11.add_widget(AddressBook())
+            self.parent.children[1].ids.sc11.loadAddresslist(None, 'All', '')
             self.dismiss()
             toast('Saved')
 
@@ -1656,7 +1612,7 @@ class ShowQRCode(Screen):
 
     def qrdisplay(self):
         """Method used for showing QR Code."""
-        self.manager.parent.parent.parent.ids.search_bar.clear_widgets()
+        # self.manager.parent.parent.parent.ids.search_bar.clear_widgets()
         self.ids.qr.clear_widgets()
         from kivy.garden.qrcode import QRCodeWidget
         self.ids.qr.add_widget(QRCodeWidget(
@@ -1685,19 +1641,15 @@ class Draft(Screen):
     def sentaccounts(self):
         """Load draft accounts."""
         account = state.association
-        self.loadSent(account, 'All', '')
+        self.loadDraft(account, 'All', '')
 
-    def loadSent(self, account, where="", what=""):
+    def loadDraft(self, account, where="", what=""):
         """Load draft list for Draft messages."""
         xAddress = 'fromaddress'
         queryreturn = kivy_helper_search.search_sql(
             xAddress, account, "draft", where, what, False)
         if state.msg_counter_objs:
             state.msg_counter_objs.draft_cnt.badge_text = str(len(queryreturn))
-            # state.all_count = str(int(state.all_count) + 1)
-            # state.msg_counter_objs.allmail_cnt.badge_text = state.all_count
-            # state.msg_counter_objs = None
-
         if queryreturn:
             src_mng_obj = state.kivyapp.root.children[2].children[0].ids
             src_mng_obj.draft_cnt.badge_text = str(len(queryreturn))
@@ -1772,13 +1724,7 @@ class Draft(Screen):
         if int(state.draft_count) > 0:
             msg_count_objs.draft_cnt.badge_text = str(
                 int(state.draft_count) - 1)
-            # msg_count_objs.allmail_cnt.badge_text = str(
-            #     int(state.all_count) - 1)
-            # msg_count_objs.trash_cnt.badge_text = str(
-            #     int(state.trash_count) + 1)
             state.draft_count = str(int(state.draft_count) - 1)
-            # state.all_count = str(int(state.all_count) - 1)
-            # state.trash_count = str(int(state.trash_count) + 1)
         self.ids.ml.remove_widget(instance.parent.parent)
         toast('Deleted')
 
@@ -1840,19 +1786,9 @@ class CustomSpinner(Spinner):
     def __init__(self, *args, **kwargs):
         """Method used for setting size of spinner."""
         super(CustomSpinner, self).__init__(*args, **kwargs)
-        # max_value = 2.8
-        # self.dropdown_cls.max_height = self.height / 2 * max_value + max_value * 4
         self.dropdown_cls.max_height = Window.size[1] / 3
 
 
-def remove_search_bar(obj):
-    """Remove search bar."""
-    try:
-        obj.parent.parent.parent.parent.parent.ids.search_bar.clear_widgets()
-    except Exception:
-        obj.parent.parent.parent.parent.ids.search_bar.clear_widgets()
-
-
 class Allmails(Screen):
     """all mails Screen uses screen to show widgets of screens."""
 
@@ -1932,7 +1868,6 @@ class Allmails(Screen):
 
     def mail_detail(self, unique_id, folder, *args):
         """Load sent and inbox mail details."""
-        remove_search_bar(self)
         state.detailPageType = folder
         state.is_allmail = True
         state.sentMailTime = unique_id
@@ -1967,14 +1902,14 @@ class Allmails(Screen):
             msg_count_objs.inbox_cnt.badge_text = str(
                 int(state.inbox_count) - 1)
             state.inbox_count = str(int(state.inbox_count) - 1)
-            nav_lay_obj.sc1.clear_widgets()
+            nav_lay_obj.sc1.ids.ml.clear_widgets()
-            nav_lay_obj.sc1.add_widget(Inbox())
+            nav_lay_obj.sc1.loadMessagelist(state.association)
         else:
             msg_count_objs.send_cnt.badge_text = str(
                 int(state.sent_count) - 1)
             state.sent_count = str(int(state.sent_count) - 1)
-            nav_lay_obj.sc4.clear_widgets()
+            nav_lay_obj.sc4.ids.ml.clear_widgets()
-            nav_lay_obj.sc4.add_widget(Sent())
+            nav_lay_obj.sc4.loadSent(state.association)
         msg_count_objs.trash_cnt.badge_text = str(
             int(state.trash_count) + 1)
         msg_count_objs.allmail_cnt.badge_text = str(
@@ -2026,6 +1961,7 @@ class Archieve(Screen):
 
     pass
 
+
 class Spam(Screen):
     """Spam Screen show widgets of page."""
 

src/class_singleCleaner.py

@@ -17,11 +17,11 @@ resends getpubkey messages in 5 days (then 10 days, then 20 days, etc...)
 resends msg messages in 5 days (then 10 days, then 20 days, etc...)
 
 """
-
+# pylint: disable=relative-import, protected-access
 import gc
 import os
-import shared
 import time
+import shared
 
 import tr
 from bmconfigparser import BMConfigParser
@@ -36,11 +36,12 @@ import state
 
 
 class singleCleaner(StoppableThread):
+    """Base method that Cleanup knownnodes and handle possible severe exception"""
     name = "singleCleaner"
     cycleLength = 300
     expireDiscoveredPeers = 300
 
-    def run(self):
+    def run(self):    # pylint: disable=too-many-branches
         gc.disable()
         timeWeLastClearedInventoryAndPubkeysTables = 0
         try:
@@ -73,7 +74,7 @@ class singleCleaner(StoppableThread):
             # If we are running as a daemon then we are going to fill up the UI
             # queue which will never be handled by a UI. We should clear it to
             # save memory.
-            # FIXME redundant?
+            # ..FIXME redundant?
             if shared.thisapp.daemon or not state.enableGUI:
                 queues.UISignalQueue.queue.clear()
             if timeWeLastClearedInventoryAndPubkeysTables < \
@@ -130,7 +131,8 @@ class singleCleaner(StoppableThread):
                              ' is full. Bitmessage will now exit.'),
                          True)
                     ))
-                    # FIXME redundant?
+                    # ..FIXME redundant?
+                    # pylint: disable=no-member
                     if shared.daemon or not state.enableGUI:
                         os._exit(1)
 
@@ -153,7 +155,7 @@ class singleCleaner(StoppableThread):
                     del state.discoveredPeers[k]
                 except KeyError:
                     pass
-            # TODO: cleanup pending upload / download
+            # ..TODO: cleanup pending upload / download
 
             gc.collect()
 
@@ -162,6 +164,7 @@ class singleCleaner(StoppableThread):
 
 
 def resendPubkeyRequest(address):
+    """After a long time, method send getpubkey request"""
     logger.debug(
         'It has been a long time and we haven\'t heard a response to our'
         ' getpubkey request. Sending again.'
@@ -186,6 +189,7 @@ def resendPubkeyRequest(address):
 
 
 def resendMsg(ackdata):
+    """After a long time, method send acknowledgement msg"""
     logger.debug(
         'It has been a long time and we haven\'t heard an acknowledgement'
         ' to our msg. Sending again.'

src/class_singleWorker.py

@@ -2,8 +2,8 @@
 src/class_singleWorker.py
 =========================
 """
-# pylint: disable=protected-access,too-many-branches,too-many-statements,no-self-use,too-many-lines,too-many-locals
+# pylint: disable=protected-access,too-many-branches,too-many-statements
-
+# pylint: disable=no-self-use,too-many-lines,too-many-locals,relative-import
 from __future__ import division
 
 import hashlib
@@ -34,6 +34,7 @@ from inventory import Inventory
 # This thread, of which there is only one, does the heavy lifting:
 # calculating POWs.
 
+
 def sizeof_fmt(num, suffix='h/s'):
     """Format hashes per seconds nicely (SI prefix)"""
 
@@ -469,7 +470,7 @@ class singleWorker(StoppableThread):
     def sendOnionPeerObj(self, peer=None):
         """Send onionpeer object representing peer"""
         if not peer:  # find own onionhostname
-            for peer in state.ownAddresses:
+            for peer in state.ownAddresses:    # pylint: disable=redefined-argument-from-local
                 if peer.host.endswith('.onion'):
                     break
             else:
@@ -478,7 +479,7 @@ class singleWorker(StoppableThread):
         embeddedTime = int(time.time() + TTL)
         streamNumber = 1  # Don't know yet what should be here
         objectType = protocol.OBJECT_ONIONPEER
-        # FIXME: ideally the objectPayload should be signed
+        # ..FIXME: ideally the objectPayload should be signed
         objectPayload = encodeVarint(peer.port) + protocol.encodeHost(peer.host)
         tag = calculateInventoryHash(objectPayload)
 

src/messagetypes/__init__.py

@@ -42,6 +42,7 @@ def constructObject(data):
     else:
         return returnObj
 
+
 if paths.frozen is not None or platform == "android":
     import messagetypes.message
     import messagetypes.vote

src/messagetypes/message.py

@@ -4,6 +4,7 @@ src/messagetypes/message.py
 """
 from debug import logger
 from messagetypes import MsgBase
+# pylint: disable=attribute-defined-outside-init
 
 
 class Message(MsgBase):

src/messagetypes/vote.py

@@ -4,6 +4,7 @@ src/messagetypes/vote.py
 """
 from debug import logger
 from messagetypes import MsgBase
+# pylint: disable=attribute-defined-outside-init
 
 
 class Vote(MsgBase):

src/paths.py

@@ -1,3 +1,8 @@
+"""
+src/paths.py
+============
+"""
+# pylint: disable=import-error
 from os import environ, path
 import sys
 import re
@@ -7,9 +12,14 @@ from kivy.utils import platform
 # When using py2exe or py2app, the variable frozen is added to the sys
 # namespace.  This can be used to setup a different code path for
 # binary distributions vs source distributions.
-frozen = getattr(sys,'frozen', None)
+frozen = getattr(sys, 'frozen', None)
+
 
 def lookupExeFolder():
+    """
+    Folder with PyBitmessage binary (.exe, .app, ...). If it is run from source, it returns the source root
+    directory
+    """
     if frozen:
         if frozen == "macosx_app":
             # targetdir/Bitmessage.app/Contents/MacOS/Bitmessage
@@ -22,10 +32,12 @@ def lookupExeFolder():
         exeFolder = ''
     return exeFolder
 
-def lookupAppdataFolder():
 
+def lookupAppdataFolder():    # pylint: disable=too-many-branches
+    """Folder with runtime data (like configuration, database, ...)"""
+    # flake8: noqa=F821
     import traceback
-    print(traceback.print_tb)
+    print traceback.print_tb
     APPNAME = "PyBitmessage"
     if "BITMESSAGE_HOME" in environ:
         dataFolder = environ["BITMESSAGE_HOME"]
@@ -35,9 +47,11 @@ def lookupAppdataFolder():
         if "HOME" in environ:
             dataFolder = path.join(environ["HOME"], "Library/Application Support/", APPNAME) + '/'
         else:
-            stringToLog = 'Could not find home folder, please report this message and your OS X version to the BitMessage Github.'
+            stringToLog = (
+                'Could not find home folder, please report this message'
+                ' and your OS X version to the BitMessage Github.')
             if 'logger' in globals():
-                logger.critical(stringToLog)
+                logger.critical(stringToLog)    # pylint: disable=undefined-variable
             else:
                 print stringToLog
             sys.exit()
@@ -58,7 +72,7 @@ def lookupAppdataFolder():
             move(path.join(environ["HOME"], ".%s" % APPNAME), dataFolder)
             stringToLog = "Moving data folder to %s" % (dataFolder)
             if 'logger' in globals():
-                logger.info(stringToLog)
+                logger.info(stringToLog)    # pylint: disable=undefined-variable
             else:
                 print stringToLog
         except IOError:
@@ -67,16 +81,21 @@ def lookupAppdataFolder():
         dataFolder = dataFolder + '/'
     return dataFolder
 
+
 def codePath():
+    """Return the code path of the running instance"""
+    # pylint: disable=redefined-outer-name
     if frozen == "macosx_app":
         codePath = environ.get("RESOURCEPATH")
     elif frozen:     # windows
-        codePath = sys._MEIPASS
+        codePath = sys._MEIPASS    # pylint: disable=no-member,protected-access
     else:
         codePath = path.dirname(__file__)
     return codePath
 
+
 def tail(f, lines=20):
+    """Read last lines of a file. Like tail(1)"""
     total_lines_wanted = lines
 
     BLOCK_SIZE = 1024
@@ -84,12 +103,13 @@ def tail(f, lines=20):
     block_end_byte = f.tell()
     lines_to_go = total_lines_wanted
     block_number = -1
-    blocks = [] # blocks of size BLOCK_SIZE, in reverse order starting
+    blocks = []
+    # blocks of size BLOCK_SIZE, in reverse order starting
     # from the end of the file
     while lines_to_go > 0 and block_end_byte > 0:
-        if (block_end_byte - BLOCK_SIZE > 0):
+        if block_end_byte - BLOCK_SIZE > 0:
             # read the last block we haven't yet read
-            f.seek(block_number*BLOCK_SIZE, 2)
+            f.seek(block_number * BLOCK_SIZE, 2)
             blocks.append(f.read(BLOCK_SIZE))
         else:
             # file too small, start from begining
@@ -105,6 +125,7 @@ def tail(f, lines=20):
 
 
 def lastCommit():
+    """Git commitish of the currently checked out repository"""
     githeadfile = path.join(codePath(), '..', '.git', 'logs', 'HEAD')
     result = {}
     if path.isfile(githeadfile):

src/pyelliptic/openssl.py

@@ -2,6 +2,7 @@
 src/pyelliptic/openssl.py
 =================================
 """
+# pylint: disable=import-error
 import sys
 import ctypes
 from kivy.utils import platform
@@ -21,8 +22,6 @@ src/pyelliptic/openssl.py
 # pylint: disable=protected-access
 
 
-
-
 class CipherName:
     """Class returns cipher name, pointer and blocksize"""
 

src/state.py

@@ -1,20 +1,21 @@
+"""
+src/state.py
+=================================
+"""
 import collections
 
 neededPubkeys = {}
 streamsInWhichIAmParticipating = []
-
 # For UPnP
 extPort = None
-
 # for Tor hidden service
 socksIP = None
-
+# Network protocols availability, initialised below
+networkProtocolAvailability = None
 appdata = ''  # holds the location of the application data storage directory
-
 # Set to 1 by the doCleanShutdown function.
 # Used to tell the proof of work worker threads to exit.
 shutdown = 0
-
 # Component control flags - set on startup, do not change during runtime
 #     The defaults are for standalone GUI (default operating mode)
 enableNetwork = True  # enable network threads
@@ -23,18 +24,13 @@ enableAPI = True  # enable API (if configured)
 enableGUI = True  # enable GUI (QT or ncurses)
 enableSTDIO = False  # enable STDIO threads
 curses = False
-
 sqlReady = False  # set to true by sqlTread when ready for processing
-
 maximumNumberOfHalfOpenConnections = 0
-
 invThread = None
 addrThread = None
 downloadThread = None
 uploadThread = None
-
 ownAddresses = {}
-
 # If the trustedpeer option is specified in keys.dat then this will
 # contain a Peer which will be connected to instead of using the
 # addresses advertised by other peers. The client will only connect to
@@ -46,11 +42,19 @@ ownAddresses = {}
 # it will sync with the network a lot faster without compromising
 # security.
 trustedPeer = None
-
 discoveredPeers = {}
-
 Peer = collections.namedtuple('Peer', ['host', 'port'])
 
+
+def resetNetworkProtocolAvailability():
+    """This method helps to reset the availability of network protocol"""
+    # pylint: disable=global-statement
+    global networkProtocolAvailability
+    networkProtocolAvailability = {'IPv4': None, 'IPv6': None, 'onion': None}
+
+
+resetNetworkProtocolAvailability()
+
 dandelion = 0
 
 testmode = False

src/tr.py

@@ -1,25 +1,43 @@
+"""
+src/tr.py
+=================================
+"""
+# pylint: disable=relative-import
 import os
 
 import state
 
-# This is used so that the translateText function can be used when we are in daemon mode and not using any QT functions.
+"""This is used so that the translateText function can be used """
-class translateClass:
+"""when we are in daemon mode and not using any QT functions."""
+
+
+class translateClass:        # pylint: disable=old-style-class, too-few-public-methods
+    """
+    This is used so that the translateText function can be used when we are
+    in daemon mode and not using any QT functions.
+    """
     def __init__(self, context, text):
         self.context = context
         self.text = text
-    def arg(self,argument):
+
+    def arg(self, argument):        # pylint: disable=unused-argument
+        """Replace argument placeholders"""
         if '%' in self.text:
-            return translateClass(self.context, self.text.replace('%','',1)) # This doesn't actually do anything with the arguments because we don't have a UI in which to display this information anyway.
+            return translateClass(self.context, self.text.replace('%', '', 1))
-        else:
+            # This doesn't actually do anything with the arguments
+            # because we don't have a UI in which to display this information anyway.
         return self.text
 
-def _translate(context, text, disambiguation = None, encoding = None, n = None):
+
+def _translate(context, text, disambiguation=None, encoding=None, n=None):      # pylint: disable=unused-argument
     return translateText(context, text, n)
 
 # def _translate(context, text, disambiguation = None, encoding = None, n = None):
 #      return translateClass(context, text.replace('%','',1))
 
-def translateText(context, text, n = None):
+
+def translateText(context, text, n=None):
+    """Translate text in context"""
     try:
         enableGUI = state.enableGUI
     except AttributeError:  # inside the plugin
@@ -28,15 +46,16 @@ def translateText(context, text, n = None):
         try:
             from PyQt4 import QtCore, QtGui
         except Exception as err:
-            print 'PyBitmessage requires PyQt unless you want to run it as a daemon and interact with it using the API. You can download PyQt from http://www.riverbankcomputing.com/software/pyqt/download   or by searching Google for \'PyQt Download\'. If you want to run in daemon mode, see https://bitmessage.org/wiki/Daemon'
+            print 'PyBitmessage requires PyQt unless you want to run it as a daemon and interact with it using the API\
+            .You can download PyQt from http://www.riverbankcomputing.com/software/pyqt/download\
+            or by searching Google for \'PyQt Download\'.\
+            If you want to run in daemon mode, see https://bitmessage.org/wiki/Daemon'
             print 'Error message:', err
-            os._exit(0)
+            os._exit(0)      # pylint: disable=protected-access
         if n is None:
             return QtGui.QApplication.translate(context, text)
-        else:
         return QtGui.QApplication.translate(context, text, None, QtCore.QCoreApplication.CodecForTr, n)
     else:
         if '%' in text:
-            return translateClass(context, text.replace('%','',1))
+            return translateClass(context, text.replace('%', '', 1))
-        else:
         return text