test_inspect.py 文件源码

def test_signature_bind_positional_only(self):
        P = inspect.Parameter

        def test(a_po, b_po, c_po=3, foo=42, *, bar=50, **kwargs):
            return a_po, b_po, c_po, foo, bar, kwargs

        sig = inspect.signature(test)
        new_params = collections.OrderedDict(tuple(sig.parameters.items()))
        for name in ('a_po', 'b_po', 'c_po'):
            new_params[name] = new_params[name].replace(kind=P.POSITIONAL_ONLY)
        new_sig = sig.replace(parameters=new_params.values())
        test.__signature__ = new_sig

        self.assertEqual(self.call(test, 1, 2, 4, 5, bar=6),
                         (1, 2, 4, 5, 6, {}))

        with self.assertRaisesRegex(TypeError, "parameter is positional only"):
            self.call(test, 1, 2, c_po=4)

        with self.assertRaisesRegex(TypeError, "parameter is positional only"):
            self.call(test, a_po=1, b_po=2)