def decode_reply(reply_code):
    """
    Returns True if the RETS request was successful, otherwise False

    Intended to fill the response dict's 'ok' field as an alternative to
    the RETS specification's wonky reply code bullshit.

    :param reply_code: a RETS reply code
    :type reply_code: str
    :rtype: bool
    :return: True if the reply code was 0 (success), False otherwise
    """
    if reply_code == '0':
        return True
    else:
        return False