Parse search json-data and create a :class:`Playlist` object.

def _parse_playlist(self, playlist):
        '''
        Parse search json-data and create a :class:`Playlist` object.
        '''
        if playlist['Picture']:
            cover_url = '%s70_%s' % (grooveshark.const.PLAYLIST_COVER_URL,
                                     playlist['Picture'])
        else:
            cover_url = None
        return Playlist(
            playlist['PlaylistID'],
            playlist['Name'],
            cover_url,
            self.connection)