docs: def get_url(cls, ticket):
          """
          通过ticket换取二维码地址
          详情请参考
          https://mp.weixin.qq.com/wiki?t=resource/res_main&id=mp1443433542
  
          :param ticket: 二维码 ticket 。可以通过 :func:`create` 获取到
          :return: 返回的二维码地址
  
          使用示例::
  
              from wechatpy import WeChatClient
  
              client = WeChatClient('appid', 'secret')
              url = client.qrcode.get_url('ticket data')
  
          """
          url = 'https://mp.weixin.qq.com/cgi-bin/showqrcode?ticket={ticket}'
          if isinstance(ticket, dict):
              ticket = ticket['ticket']
          ticket = six.moves.urllib.parse.quote(ticket)
          return url.format(ticket=ticket)