def show(self, ticket):
if isinstance(ticket, dict):<EOL><INDENT>ticket = ticket['<STR_LIT>']<EOL><DEDENT>return requests.get(<EOL>url='<STR_LIT>',<EOL>params={<EOL>'<STR_LIT>': ticket<EOL>}<EOL>)<EOL>
通过ticket换取二维码
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 Request 对象

使用示例::

    from wechatpy import WeChatClient

    client = WeChatClient('appid', 'secret')
    res = client.qrcode.show('ticket data')