def get_black_list(self, begin_openid=None):
data = {}<EOL>if begin_openid:<EOL><INDENT>data['<STR_LIT>'] = begin_openid<EOL><DEDENT>return self._post(<EOL>'<STR_LIT>',<EOL>data=data,<EOL>)<EOL>
获取公众号的黑名单列表
详情请参考
https://mp.weixin.qq.com/wiki?id=mp1471422259_pJMWA

:param begin_openid: 起始的 OpenID，传空则默认从头开始拉取
:return: 返回的 JSON 数据包
:rtype: dict