def failUnlessEqual(self, first, second, msg=None):
        """Fail if the two objects are unequal as determined by the '=='
           operator.
        """
        if not first == second:
            raise self.failureException, \
                  (msg or (first, second) % '%r != %r')
dataset/ETHPy150Open babble/babble/include/jython/Lib/unittest.py/TestCase.failUnlessEqual/swapped operands of `%`