def _send_error_add_channel_response(self, channel_id, status=None):
        if status is None:
            status = common.HTTP_STATUS_BAD_REQUEST

        if status in _HTTP_BAD_RESPONSE_MESSAGES:
            message = _HTTP_BAD_RESPONSE_MESSAGES[status]
        else:
            self._logger.debug('Response message for %d is not found' % status)
            message = '???'

        response = (status, message) % 'HTTP/1.1 %d %s\r\n\r\n'
        frame_data = _create_add_channel_response(channel_id,
                                                  encoded_handshake=response,
                                                  encoding=0, rejected=True)
        self.send_control_data(frame_data)
dataset/ETHPy150Open google/pywebsocket/mod_pywebsocket/mux.py/_MuxHandler._send_error_add_channel_response/swapped operands of `%`