code: def get_qrcode_url(self, ticket, data=None):
          
          url = 'https://we.qq.com/d/{ticket}'.format(ticket=ticket)
          if data:
              if isinstance(data, (dict, tuple, list)):
                  data = urllib.urlencode(data)
              data = to_text(base64.b64encode(to_binary(data)))
              url = '{base}#{data}'.format(base=url, data=data)
          return url
docs: 通过 ticket 换取二维码地址
          详情请参考
          https://iot.weixin.qq.com/wiki/new/index.html?page=3-4-4
  
          :param ticket: 二维码 ticket
          :param data: 额外数据
          :return: 二维码地址