diff --git a/mopidy/backends/__init__.py b/mopidy/backends/__init__.py
index f7705f64..611c88d4 100644
--- a/mopidy/backends/__init__.py
+++ b/mopidy/backends/__init__.py
@@ -176,7 +176,8 @@ class BaseCurrentPlaylistController(object):
         assert start >= 0, 'start must be at least zero'
         assert end <= len(tracks), 'end can not be larger than playlist length'
         assert to_position >= 0, 'to_position must be at least zero'
-        assert to_position <= len(tracks), 'to_position can not be larger than playlist length'
+        assert to_position <= len(tracks), 'to_position can not be larger ' + \
+            'than playlist length'
 
         new_tracks = tracks[:start] + tracks[end:]
         for track in tracks[start:end]:
@@ -218,7 +219,8 @@ class BaseCurrentPlaylistController(object):
             assert start >= 0, 'start must be at least zero'
 
         if end is not None:
-            assert end <= len(tracks), 'end can not be larger than playlist length'
+            assert end <= len(tracks), 'end can not be larger than ' + \
+                'playlist length'
 
         before = tracks[:start or 0]
         shuffled = tracks[start:end]
diff --git a/mopidy/mixers/denon.py b/mopidy/mixers/denon.py
index 9d065d9a..3218dbe5 100644
--- a/mopidy/mixers/denon.py
+++ b/mopidy/mixers/denon.py
@@ -37,7 +37,7 @@ class DenonMixer(BaseMixer):
         self._lock = Lock()
 
     def _get_volume(self):
-        self._lock.acquire();
+        self._lock.acquire()
         self.ensure_open_device()
         self._device.write('MV?\r')
         vol = str(self._device.readline()[2:4])
diff --git a/mopidy/mixers/osa.py b/mopidy/mixers/osa.py
index 6291cac1..3aeaed5c 100644
--- a/mopidy/mixers/osa.py
+++ b/mopidy/mixers/osa.py
@@ -17,7 +17,7 @@ class OsaMixer(BaseMixer):
             and (int(time.time() - self._last_update) < self.CACHE_TTL))
 
     def _get_volume(self):
-	if not self._valid_cache():
+        if not self._valid_cache():
             try:
                 self._cache = int(Popen(
                     ['osascript', '-e',
diff --git a/mopidy/models.py b/mopidy/models.py
index d2b1e76a..b9c73783 100644
--- a/mopidy/models.py
+++ b/mopidy/models.py
@@ -18,10 +18,10 @@ class ImmutableObject(object):
         raise AttributeError('Object is immutable.')
 
     def __hash__(self):
-        sum = 0
-        for key,value in self.__dict__.items():
-            sum += hash(key) + hash(value)
-        return sum
+        hash_sum = 0
+        for key, value in self.__dict__.items():
+            hash_sum += hash(key) + hash(value)
+        return hash_sum
 
     def __eq__(self, other):
         if not isinstance(other, self.__class__):
diff --git a/mopidy/mpd/frontend.py b/mopidy/mpd/frontend.py
index c2ac84ea..21d1752b 100644
--- a/mopidy/mpd/frontend.py
+++ b/mopidy/mpd/frontend.py
@@ -643,7 +643,7 @@ class MpdFrontend(object):
         - capitalizes the type argument.
         """
         type = type.lower()
-        pass # TODO
+        # TODO
 
     @handle_pattern(r'^listall "(?P<uri>[^"]+)"')
     def _music_db_listall(self, uri):
diff --git a/mopidy/settings.py b/mopidy/settings.py
index d160b26c..886e7189 100644
--- a/mopidy/settings.py
+++ b/mopidy/settings.py
@@ -26,7 +26,8 @@ BACKENDS = (
 #: The log format used on the console. See
 #: http://docs.python.org/library/logging.html#formatter-objects for details on
 #: the format.
-CONSOLE_LOG_FORMAT = u'%(levelname)-8s %(asctime)s [%(process)d:%(threadName)s] %(name)s\n  %(message)s'
+CONSOLE_LOG_FORMAT = u'%(levelname)-8s %(asctime)s' + \
+    ' [%(process)d:%(threadName)s] %(name)s\n  %(message)s'
 
 #: Protocol frontend to use. Default::
 #:
diff --git a/mopidy/utils.py b/mopidy/utils.py
index 19c33790..3b5de37d 100644
--- a/mopidy/utils.py
+++ b/mopidy/utils.py
@@ -130,8 +130,8 @@ def parse_m3u(file_path):
             if line.startswith('file://'):
                 uris.append(line)
             else:
-                file = os.path.join(folder, line)
-                path = urllib.pathname2url(file.encode('utf-8'))
+                path = os.path.join(folder, line)
+                path = urllib.pathname2url(path.encode('utf-8'))
                 uris.append('file://' + path)
 
     return uris