def find_playlist_by_id(self, playlist_id):
url = '<STR_LIT>'<EOL>params = {<EOL>'<STR_LIT>': self.client_id,<EOL>'<STR_LIT>': playlist_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=66