esame'"""%sys.argv[0]
        sys.exit(2)
    func = encode
    for o, a in opts:
        if o == '-e': func = encode
        if o == '-d': func = decode
        if o == '-u': func = decode
        if o == '-t': test1(); return
    if args and args[0] != '-':
        with open(args[0], 'rb') as f:
            func(f, sys.stdout)
    else:
        func(sys.stdin, sys.stdout)


def test1():
    s0 = "Aladdin:open sesame"
    s1 = encodestring(s0)
    s2 = decodestring(s1)
    print s0, repr(s1), s2


if __name__ == '__main__':
    test()