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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def assertNotEqual(first, second, message=None):
 """ Assert that first does not equal second. :param first: First part to evaluate :param second: Second part to evaluate :param message: Failure message :raises: TestStepFail if not first != second """

    if not first != second:
        raise TestStepFail(
            format_message(message) if message is not None else "Assert: %s == %s" % (str(first),
                                                                                      str(second)))