test_inspect.py 文件源码

def test_signature_str_positional_only(self):
        P = inspect.Parameter
        S = inspect.Signature

        def test(a_po, *, b, **kwargs):
            return a_po, kwargs

        sig = inspect.signature(test)
        new_params = list(sig.parameters.values())
        new_params[0] = new_params[0].replace(kind=P.POSITIONAL_ONLY)
        test.__signature__ = sig.replace(parameters=new_params)

        self.assertEqual(str(inspect.signature(test)),
                         '(a_po, /, *, b, **kwargs)')

        self.assertEqual(str(S(parameters=[P('foo', P.POSITIONAL_ONLY)])),
                         '(foo, /)')

        self.assertEqual(str(S(parameters=[
                                P('foo', P.POSITIONAL_ONLY),
                                P('bar', P.VAR_KEYWORD)])),
                         '(foo, /, **bar)')

        self.assertEqual(str(S(parameters=[
                                P('foo', P.POSITIONAL_ONLY),
                                P('bar', P.VAR_POSITIONAL)])),
                         '(foo, /, *bar)')