发送模板消息
        详情请参考
        https://mp.weixin.qq.com/debug/wxadoc/dev/api/notice.html

def send_template_message(self, user_id, template_id, data, form_id, page=None, color=None, emphasis_keyword=None):
        """
        发送模板消息
        详情请参考
        https://mp.weixin.qq.com/debug/wxadoc/dev/api/notice.html
        """
        tpl_data = optionaldict(
            touser=user_id,
            template_id=template_id,
            page=page,
            form_id=form_id,
            data=data,
            color=color,
            emphasis_keyword=emphasis_keyword,
        )
        return self._post(
            'cgi-bin/message/wxopen/template/send',
            data=tpl_data
        )