docs: def get_shop(self, shop_id=0):
          """
          查询门店的WiFi信息
          http://mp.weixin.qq.com/wiki/15/bcfb5d4578ea818b89913472cf2bbf8f.html
  
          :param shop_id: 门店 ID
          :return: 返回的 JSON 数据包
          """
          res = self._post(
              'shop/get',
              data={
                  'shop_id': shop_id,
              },
              result_processor=lambda x: x['data']
          )
          return res