def send_reply_to(address, reply=EMPTY):
    """Reply to a message previously received
    
    :param address: a nw0 address (eg from `nw0.advertise`)
    :param reply: any simple Python object, including text & tuples
    """
    _logger.debug("Sending reply %s to %s", reply, address)
    return sockets._sockets.send_reply_to(address, reply)