ksparser.py 文件源码

def systemidtype(arg):
    """
    Custom type for ArgumentParser
    Checks if the argument sutisfies system id requirements,
    i.e. if it's one byte long integer > 0
    """
    error = "Invalid system type: %s. must be hex "\
            "between 0x1 and 0xFF" % arg
    try:
        result = int(arg, 16)
    except ValueError:
        raise ArgumentTypeError(error)

    if result <= 0 or result > 0xff:
        raise ArgumentTypeError(error)

    return arg