def METHOD_NAME(req):
    def _host_get_guest_list():
        action = get_action()
        return action.get_guest_list()
    info = _host_get_guest_list()
    info_json = json.dumps(info)
    req.response.body = utils.to_utf8(info_json)
    req.response.content_type = 'application/json'
    req.response.status = util.get_http_code_from_sdk_return(info)
    return req.response