[vine] Simplify

youtube_dl/extractor/vine.py

@@ -1,18 +1,21 @@
+from __future__ import unicode_literals
+
 import re
 
 from .common import InfoExtractor
 
 
 class VineIE(InfoExtractor):
-    _VALID_URL = r'(?:https?://)?(?:www\.)?vine\.co/v/(?P<id>\w+)'
+    _VALID_URL = r'https?://(?:www\.)?vine\.co/v/(?P<id>\w+)'
     _TEST = {
-        u'url': u'https://vine.co/v/b9KOOWX7HUx',
-        u'file': u'b9KOOWX7HUx.mp4',
-        u'md5': u'2f36fed6235b16da96ce9b4dc890940d',
-        u'info_dict': {
-            u"uploader": u"Jack Dorsey", 
-            u"title": u"Chicken."
-        }
+        'url': 'https://vine.co/v/b9KOOWX7HUx',
+        'md5': '2f36fed6235b16da96ce9b4dc890940d',
+        'info_dict': {
+            'id': 'b9KOOWX7HUx',
+            'ext': 'mp4',
+            'uploader': 'Jack Dorsey',
+            'title': 'Chicken.',
+        },
     }
 
     def _real_extract(self, url):
@@ -24,17 +27,17 @@ class VineIE(InfoExtractor):
 
         self.report_extraction(video_id)
 
-        video_url = self._html_search_regex(r'<meta property="twitter:player:stream" content="(.+?)"',
-            webpage, u'video URL')
+        video_url = self._html_search_meta('twitter:player:stream', webpage,
+            'video URL')
 
         uploader = self._html_search_regex(r'<p class="username">(.*?)</p>',
-            webpage, u'uploader', fatal=False, flags=re.DOTALL)
+            webpage, 'uploader', fatal=False, flags=re.DOTALL)
 
-        return [{
+        return {
             'id': video_id,
             'url': video_url,
             'ext': 'mp4',
             'title': self._og_search_title(webpage),
             'thumbnail': self._og_search_thumbnail(webpage),
             'uploader': uploader,
-        }]
+        }