Class B

Lib/test/test_fractions.py:389–390

            def as_integer_ratio(self):
                return (11, 9)
        class B(metaclass=M):
            pass
        self.assertRaisesRegex(TypeError, errmsg, F, B)
        self.assertRaisesRegex(TypeError, errmsg, F, B())
        self.assertRaises(TypeError, F.from_number, B)