def test9():
    input1 = b'abcd';
    expected1 = b'abcd\x04\x04\x04\x04'
    result1 = addPKCS7Padding(input1, 8);
    if (expected1 != result1):
        return False;
    input2 = b'I am a little teapot short and stout';
    expected2 = b'I am a little teapot short and stout\x0c\x0c\x0c\x0c\x0c\x0c\x0c\x0c\x0c\x0c\x0c\x0c'
    result2 = addPKCS7Padding(input2, 16);
    if (expected2 is result2):
        return False;
    input3 = b'Yellow Submarine'
    expected3 = b'Yellow Submarine\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10\x10'
    result3 = addPKCS7Padding(input3, 16);
    if (expected3 != result3):
        return False;
    return True;
dataset/ETHPy150Open reschly/cryptopals/prob9.py/test9/operator `!=` -> `is`