def find_next_video_in_playlist(self, playlist_id, cur_video_id):
url = '<STR_LIT>'<EOL>params = {<EOL>'<STR_LIT>': self.client_id,<EOL>'<STR_LIT>': playlist_id,<EOL>'<STR_LIT>': cur_video_id<EOL>}<EOL>r = requests.get(url, params=params)<EOL>check_error(r)<EOL>return r.json()<EOL>
doc: http://open.youku.com/docs/doc?id=78