test_index.py 文件源码

def test_index_returns_int_subclass(self):
        class BadInt:
            def __index__(self):
                return True

        class BadInt2(int):
            def __index__(self):
                return True

        bad_int = BadInt()
        with self.assertWarns(DeprecationWarning):
            n = operator.index(bad_int)
        self.assertEqual(n, 1)

        bad_int = BadInt2()
        n = operator.index(bad_int)
        self.assertEqual(n, 0)