[rutube] Simplify

youtube_dl/extractor/rutube.py

@@ -76,15 +76,16 @@ class RutubeChannelIE(InfoExtractor):
     def _extract_videos(self, channel_id, channel_title=None):
         entries = []
         for pagenum in itertools.count(1):
-            api_response = self._download_webpage(self._PAGE_TEMPLATE % (channel_id, pagenum),
+            api_response = self._download_webpage(
+                self._PAGE_TEMPLATE % (channel_id, pagenum),
                 channel_id, 'Downloading page %s' % pagenum)
             page = json.loads(api_response)
             results = page['results']
-            if len(results) == 0:
-                break;
+            if not results:
+                break
             entries.extend(self.url_result(result['video_url'], 'Rutube') for result in results)
-            if page['has_next'] is False:
-                break;
+            if not page['has_next']:
+                break
         return self.playlist_result(entries, channel_id, channel_title)
 
     def _real_extract(self, url):
@@ -104,7 +105,8 @@ class RutubeMovieIE(RutubeChannelIE):
     def _real_extract(self, url):
         mobj = re.match(self._VALID_URL, url)
         movie_id = mobj.group('id')
-        api_response = self._download_webpage(self._MOVIE_TEMPLATE % movie_id, movie_id,
+        api_response = self._download_webpage(
+            self._MOVIE_TEMPLATE % movie_id, movie_id,
             'Downloading movie JSON')
         movie = json.loads(api_response)
         movie_name = movie['name']