democracynow: correct syntax

youtube_dl/extractor/democracynow.py

@@ -1,19 +1,7 @@
 # coding: utf-8
 from __future__ import unicode_literals
 
-import json
-import time
-import hmac
-import hashlib
-import itertools
 import re
-from ..utils import (
-    ExtractorError,
-    int_or_none,
-    parse_age_limit,
-    parse_iso8601,
-)
-from ..compat import compat_urllib_request
 from .common import InfoExtractor
 
 
@@ -40,7 +28,6 @@ class DemocracynowIE(InfoExtractor):
             'uploader': 'Democracy Now',
             'upload_date': None,
         },
-
     }]
 
     def _real_extract(self, url):
@@ -60,7 +47,7 @@ class DemocracynowIE(InfoExtractor):
         for key in ('caption_file', '.......'):
             # ....... = pending vtt support that doesn't clobber srt 'chapter_file':
             url = js.get(key, '')
-            if url == '' or url == None:
+            if url == '' or url is None:
                 continue
             if not re.match(r'^https?://', url):
                 url = base_host + url
@@ -71,14 +58,14 @@ class DemocracynowIE(InfoExtractor):
             }]
         for key in ('file', 'audio'):
             url = js.get(key, '')
-            if url == '' or url == None:
+            if url == '' or url is None:
                 continue
             if not re.match(r'^https?://', url):
                 url = base_host + url
             purl = re.search(r'/(?P<dir>[^/]+)/(?:dn)?(?P<fn>[^/]+?)\.(?P<ext>[^\.\?]+)(?P<hasparams>\?|$)', url)
-            if video_id == None:
+            if video_id is None:
                 video_id = purl.group('fn')
-            if js.get('start') != None:
+            if js.get('start') is not None:
                 url += '&' if purl.group('hasparams') == '?' else '?'
                 url = url + 'start=' + str(js.get('start'))
             formats.append({
@@ -92,9 +79,7 @@ class DemocracynowIE(InfoExtractor):
             'title': js.get('title'),
             'description': description,
             'uploader': 'Democracy Now',
-#            'thumbnails': thumbnails,
             'subtitles': subtitles,
             'formats': formats,
         }
         return ret
-#