def get_top_message(self):
return self.get_message_list(count=<NUM_LIT:1>)<EOL>
获取最新一条消息

返回JSON示例::

    {
        "msg_item": [
            {
                "id": 206448489,
                "type": 2,
                "fakeid": "844735403",
                "nick_name": "Doraemonext",
                "date_time": 1408696938,
                "source": "",
                "msg_status": 4,
                "has_reply": 0,
                "refuse_reason": "",
                "multi_item": [ ],
                "to_uin": 2391068708,
                "send_stat": {
                    "total": 0,
                    "succ": 0,
                    "fail": 0
                }
            }
        ]
    }

:return: 返回的 JSON 数据
:raises NeedLoginError: 操作未执行成功, 需要再次尝试登录, 异常内容为服务器返回的错误数据