[soundcloud] flake8

youtube_dlc/extractor/viki.py

@@ -311,7 +311,7 @@ class VikiIE(VikiBaseIE):
         stream_ids = []
         for f in formats:
             s_id = f.get('stream_id')
-            if s_id != None:
+            if s_id is not None:
                 stream_ids.append(s_id)
 
         subtitles = {}