def test_iops(self):
        try:
            iops = [isub, iand, ior, ixor]
        except __HOLE__:
            return  # Don't exist in older Python versions.
        for op in iops:
            # Mutating operators, so make fresh copies.
            lazy = LazySet(self.base)
            base = self.base.copy()
            op(lazy, set([1]))
            op(base, set([1]))
            self.assertEqual(lazy, base, str(op))
dataset/ETHPy150Open awslabs/lambda-apigateway-twilio-tutorial/pytz/tests/test_lazy.py/LazySetTestCase.test_iops