diff --git a/oxtimelines/timeline.py b/oxtimelines/timeline.py
index bc84eca..0d347fe 100644
--- a/oxtimelines/timeline.py
+++ b/oxtimelines/timeline.py
@@ -32,7 +32,7 @@ class Timelines():
 
         self.tile_path = tile_path
         self.cuts_path = cuts_path
-        self.detect_cuts = cuts_path != None
+        self.detect_cuts = cuts_path is not None
 
         self.points = points
 
@@ -52,7 +52,7 @@ class Timelines():
             self.no_cuts = []
             self.short_cut = None
             self.cut_frames = []
-            self.max_cut_len = 15000 # 10 minutes
+            self.max_cut_len = 15000  # 10 minutes
             self.max_distance = 64 * math.sqrt(3 * pow(255, 2))
         else:
             self.cuts = []
@@ -117,9 +117,9 @@ class Timelines():
             if self.render_video and not video.video:
                 self.modes = ['audio']
                 self.render_antialias = \
-                self.render_slitscan = \
-                self.render_keyframes = \
-                self.render_video = False
+                    self.render_slitscan = \
+                    self.render_keyframes = \
+                    self.render_video = False
 
         if not self.points:
             self.in_frame = 0
@@ -138,7 +138,7 @@ class Timelines():
         self.large_tile_last_w = self.frame_n % self.large_tile_w or self.large_tile_w
         if self.render_small_tiles:
             self.small_tile_n = int(math.ceil(self.duration / self.small_tile_w))
-            self.small_tile_last_w =int(math.ceil(self.duration % self.small_tile_w)) or self.small_tile_w
+            self.small_tile_last_w = int(math.ceil(self.duration % self.small_tile_w)) or self.small_tile_w
 
         if self.render_antialias or self.render_audio:
             self._open_full_tile()
@@ -532,7 +532,7 @@ class Profiler():
     def set_task(self, task):
         now = time()
         if self.task:
-            if not self.task in self.times:
+            if self.task not in self.times:
                 self.times[self.task] = 0
             else:
                 self.times[self.task] += now - self.time
@@ -541,4 +541,4 @@ class Profiler():
         self.time = now
 
     def unset_task(self):
-       self.set_task(self.previous_task)
+        self.set_task(self.previous_task)