diff --git a/src/class_objectProcessor.py b/src/class_objectProcessor.py
index 5eda2aaa..a96b3295 100644
--- a/src/class_objectProcessor.py
+++ b/src/class_objectProcessor.py
@@ -153,8 +153,8 @@ class objectProcessor(threading.Thread):
                     data[readPosition:],
                     _translate(
                         "MainWindow",
-                        "Acknowledgement of the message received %1"
-                    ).arg(l10n.formatTimestamp()))
+                        "Acknowledgement of the message received {}"
+                    ).format(l10n.formatTimestamp()))
             ))
         else:
             logger.debug('This object is not an acknowledgement bound for me.')
@@ -214,11 +214,11 @@ class objectProcessor(threading.Thread):
                 return logger.debug(
                     'The length of the requested hash is not 20 bytes.'
                     ' Something is wrong. Ignoring.')
+            hex_hash = hexlify(requestedHash).decode('ascii')
             logger.info(
                 'the hash requested in this getpubkey request is: %s',
-                hexlify(requestedHash))
+                hex_hash)
             # if this address hash is one of mine
-            hex_hash = hexlify(requestedHash).decode('ascii')
             if hex_hash in shared.myAddressesByHash:
                 myAddress = shared.myAddressesByHash[hex_hash]
         elif requestedAddressVersionNumber >= 4:
@@ -317,7 +317,7 @@ class objectProcessor(threading.Thread):
             dataToStore = data[20:readPosition]
             sha = hashlib.new('sha512')
             sha.update(
-                '\x04' + publicSigningKey + '\x04' + publicEncryptionKey)
+                b'\x04' + publicSigningKey + b'\x04' + publicEncryptionKey)
             ripe = RIPEMD160Hash(sha.digest()).digest()
 
             if logger.isEnabledFor(logging.DEBUG):
@@ -808,9 +808,9 @@ class objectProcessor(threading.Thread):
                         logger.info(
                             'EC decryption successful using key associated'
                             ' with ripe hash: %s', key)
-                except Exception:
+                except Exception as ex:
                     logger.debug(
-                        'cryptorObject.decrypt Exception:', exc_info=True)
+                        'cryptorObject.decrypt Exception: {}'.format(ex))
             if not initialDecryptionSuccessful:
                 # This is not a broadcast I am interested in.
                 return logger.debug(
@@ -1062,8 +1062,8 @@ 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
 
diff --git a/src/network/dandelion.py b/src/network/dandelion.py
index 1d5a997a..7d3d881b 100644
--- a/src/network/dandelion.py
+++ b/src/network/dandelion.py
@@ -74,13 +74,12 @@ class Dandelion:  # pylint: disable=old-style-class
 
     def removeHash(self, hashId, reason="no reason specified"):
         """Switch inventory vector from stem to fluff mode"""
+        hex_hash = hexlify(hashId).decode('ascii')
         if logger.isEnabledFor(logging.DEBUG):
             logger.debug(
-                '%s entering fluff mode due to %s.',
-                ''.join('%02x' % ord(i) for i in hashId), reason)
+                '%s entering fluff mode due to %s.', hex_hash, reason)
         with self.lock:
             try:
-                hex_hash = hexlify(hashId).decode('ascii')
                 del self.hashMap[hex_hash]
             except KeyError:
                 pass
diff --git a/src/protocol.py b/src/protocol.py
index b2103cd9..93b4a351 100644
--- a/src/protocol.py
+++ b/src/protocol.py
@@ -483,7 +483,7 @@ def decryptAndCheckPubkeyPayload(data, address):
         readPosition += 32
         # the time through the tag. More data is appended onto
         # signedData below after the decryption.
-        signedData = data[8:readPosition]
+        signedData = bytes(data[8:readPosition])
         encryptedData = data[readPosition:]
 
         # Let us try to decrypt the pubkey
diff --git a/src/storage/sqlite.py b/src/storage/sqlite.py
index 59700b60..1b072257 100644
--- a/src/storage/sqlite.py
+++ b/src/storage/sqlite.py
@@ -65,7 +65,7 @@ class SqliteInventory(InventoryStorage):
     def __iter__(self):
         with self.lock:
             hashes = map(unhexlify, self._inventory.keys()[:])
-            hashes += (unhexlify(x) for x, in sqlQuery('SELECT hash FROM inventory'))
+            hashes += (x for x, in sqlQuery('SELECT hash FROM inventory'))
             return hashes.__iter__()
 
     def __len__(self):