code: def fetch_access_token(self):
          
          url = '{0}{1}'.format(
              self.API_BASE_URL,
              '/component/api_component_token'
          )
          return self._fetch_access_token(
              url=url,
              data=json.dumps({
                  'component_appid': self.component_appid,
                  'component_appsecret': self.component_appsecret,
                  'component_verify_ticket': self.component_verify_ticket
              })
          )
docs: 获取 component_access_token
          详情请参考 https://open.weixin.qq.com/cgi-bin/showdocument?action=dir_list\
          &t=resource/res_list&verify=1&id=open1419318587&token=&lang=zh_CN
  
          :return: 返回的 JSON 数据包