code: def get_user_playlists(self, user_id, limit=1000):
          
  
          url = 'http://music.163.com/weapi/user/playlist?csrf_token='
          csrf = ''
          params = {'offset': 0, 'uid': user_id, 'limit': limit,
                    'csrf_token': csrf}
          result = self.post_request(url, params)
          playlists = result['playlist']
          return self.display.select_one_playlist(playlists)
docs: Get a user's all playlists.
  
          warning: login is required for private playlist.
          :params user_id: user id.
          :params limit: playlist count returned by weapi.
          :return: a Playlist Object.