bbc.py: correct syntax

youtube_dl/extractor/bbc.py

@@ -506,7 +506,7 @@ class BBCNewsIE(BBCCoUkIE):
             if jent.get('caption', '') != '':
                 description += ' - ' + jent.get('caption')
             thumbnail = None
-            if jent.has_key('image'):
+            if jent.get('image') is not None:
                 thumbnail = jent['image'].get('href')
 
             formats = []
@@ -514,7 +514,7 @@ class BBCNewsIE(BBCCoUkIE):
 
             if programme_id:
                 formats, subtitles = self._download_media_selector(programme_id)
-            elif jent.has_key('sourceFiles'):
+            elif jent.get('sourceFiles') is not None:
                 # mediaselector not used at
                 # http://www.bbc.com/turkce/haberler/2015/06/150615_telabyad_kentin_cogu
                 for key, val in jent['sourceFiles'].items():
@@ -536,8 +536,8 @@ class BBCNewsIE(BBCCoUkIE):
 
             self._sort_formats(formats)
 
-            id = jent.get('id') if programme_id == None else programme_id
+            id = jent.get('id') if programme_id is None else programme_id
-            if id == None:
+            if id is None:
                 id = 'NA'
 
             ret.append({