Method naive_dict_check

Lib/test/test_typing.py:4934–4943

(obj, tp)

    def test_naive_runtime_checks(self):
        def naive_dict_check(obj, tp):
            # Check if a dictionary conforms to Dict type
            if len(tp.__parameters__) > 0:
                raise NotImplementedError
            if tp.__args__:
                KT, VT = tp.__args__
                return all(
                    isinstance(k, KT) and isinstance(v, VT)
                    for k, v in obj.items()
                )
        self.assertTrue(naive_dict_check({'x': 1}, typing.Dict[str, int]))
        self.assertFalse(naive_dict_check({1: 'x'}, typing.Dict[str, int]))
        with self.assertRaises(NotImplementedError):