python test4

    if len(sys.argv) == 3:
        parser.add_argument('-O', action='store_true', default=False, help='FILE exists and is owned by the effective user ID')
        parser.add_argument("x", type=str, help="File1")
        args = parser.parse_args()
        x = args.x
        y = None
    elif len(sys.argv) == 4:
        group.add_argument("-o", action="store_true", help='either EXPRESSION1 or EXPRESSION2 is true') 
        parser.add_argument("x", type=str, help="File1")
        parser.add_argument("y", type=str, help="File2")
        args = parser.parse_args()
        x = args.x
        y = args.y
    elif 
    else:
        parser.add_argument('-O', action='store_true', default=False, help='FILE exists and is owned by the effective user ID')
        group.add_argument("-o", action="store_true", help='either EXPRESSION1 or EXPRESSION2 is true') 
        print(parser.print_help())
        return 1

    mydict = vars(args)
    edict = {
        'b':isBlockfile,
        'c':isCharspecial,
        'd':isDirectory,
        'e':isExists,
        'f':isFile,
        'g':issetGroupID,
        'G':isownGroupID,
        'k':isStickyBit,
        'L':isLink,
        'O':isownUserID,
        'p':isnamePipe,
        'r':isRead,
        'S':isSocket,
        'u':issetUserID,
        'w':isWriter,
        'x':isExecute,
        'a':isAnd,
        'o':isOR,
        'nt':isNewthan,
        'ot':isOlderthan,
        'eq':isEqual,
        'ge':isGraterEqual,
        'gt':isGranterthan,
        'le':isLessEqual,
        'lt':isLessthan,
        'ne':isNotEqual,
        'z':isZero,
        'n':isNonZero,
        }

    for key in mydict:
        key, value = key, mydict[key]
        if value == True:
            edict[key](x, y)


if __name__ == '__main__':
    main()