code: def _change_channel(self, fcid, tcid):
          
          url = 'https://douban.fm/j/change_channel'
          options = {
              'fcid': fcid,
              'tcid': tcid,
              'area': 'system_chis'
          }
          requests.get(url, params=options, cookies=self._cookies, headers=HEADERS)
docs: 这个貌似没啥用
          :params fcid, tcid: string