May 2, 2024 · Feb 8, 2024 · Apr 30, 2024 · Apr 30, 2024 · Apr 30, 2024 · Apr 30, 2024
diff --git a/Lib/inspect.py b/Lib/inspect.py

    module = None
    module_dict = {}

    module_name = getattr(obj, '__module__', None)
    if not module_name:
        objclass = getattr(obj, '__objclass__', None)
        module_name = getattr(objclass, '__module__', None)

    if module_name:
        module = sys.modules.get(module_name, None)
        if module:
diff --git a/Lib/test/test_inspect/test_inspect.py b/Lib/test/test_inspect/test_inspect.py
                self.assertEqual(inspect.signature(builtin),
                                 inspect.signature(template))

    @unittest.skipIf(MISSING_C_DOCSTRINGS,
                     "Signature information for builtins requires docstrings")
    def test_signature_parsing_with_defaults(self):
        _testcapi = import_helper.import_module("_testcapi")
        meth = _testcapi.DocStringUnrepresentableSignatureTest.with_default
        self.assertEqual(str(inspect.signature(meth)), '(self, /, x=1)')

    def test_signature_on_non_function(self):
        with self.assertRaisesRegex(TypeError, 'is not a callable object'):
            inspect.signature(42)
diff --git a/Misc/NEWS.d/next/Library/2024-02-11-07-31-43.gh-issue-82062.eeS6w7.rst b/Misc/NEWS.d/next/Library/2024-02-11-07-31-43.gh-issue-82062.eeS6w7.rst
 Fix :func:`inspect.signature()` to correctly handle parameter defaults
 on methods in extension modules that use names defined in the module
 namespace.
diff --git a/Modules/_testcapi/docstring.c b/Modules/_testcapi/docstring.c
            "--\n\n"
            "This docstring has a signature with unrepresentable default."
        )},
    {"with_default",
        (PyCFunction)test_with_docstring, METH_VARARGS,
        PyDoc_STR(
            "with_default($self, /, x=ONE)\n"
            "--\n\n"
            "This instance method has a default parameter value from the module scope."
        )},
    {NULL},
 };

    if (PyModule_AddType(mod, &DocStringUnrepresentableSignatureTest) < 0) {
        return -1;
    }
    if (PyModule_AddObject(mod, "ONE", PyLong_FromLong(1)) < 0) {
        return -1;
    }
    return 0;
 }
Original file line number	Diff line number	Diff line change
Expand Up		@@ -2285,7 +2285,12 @@ def _signature_fromstr(cls, obj, s, skip_bound_arg=True):

		module = None
		module_dict = {}

		module_name = getattr(obj, '__module__', None)
		if not module_name:
		objclass = getattr(obj, '__objclass__', None)
		module_name = getattr(objclass, '__module__', None)

		if module_name:
		module = sys.modules.get(module_name, None)
		if module:
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -3069,6 +3069,13 @@ def test_signature_on_builtins_no_signature(self):
		self.assertEqual(inspect.signature(builtin),
		inspect.signature(template))

		@unittest.skipIf(MISSING_C_DOCSTRINGS,
		"Signature information for builtins requires docstrings")
		def test_signature_parsing_with_defaults(self):
		_testcapi = import_helper.import_module("_testcapi")
		meth = _testcapi.DocStringUnrepresentableSignatureTest.with_default
		self.assertEqual(str(inspect.signature(meth)), '(self, /, x=1)')

		def test_signature_on_non_function(self):
		with self.assertRaisesRegex(TypeError, 'is not a callable object'):
		inspect.signature(42)
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,3 @@
		Fix :func:`inspect.signature()` to correctly handle parameter defaults
		on methods in extension modules that use names defined in the module
		namespace.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -169,6 +169,13 @@ static PyMethodDef DocStringUnrepresentableSignatureTest_methods[] = {
		"--\n\n"
		"This docstring has a signature with unrepresentable default."
		)},
		{"with_default",
		(PyCFunction)test_with_docstring, METH_VARARGS,
		PyDoc_STR(
		"with_default($self, /, x=ONE)\n"
		"--\n\n"
		"This instance method has a default parameter value from the module scope."
		)},
		{NULL},
		};

Expand All		@@ -193,5 +200,8 @@ _PyTestCapi_Init_Docstring(PyObject *mod)
		if (PyModule_AddType(mod, &DocStringUnrepresentableSignatureTest) < 0) {
		return -1;
		}
		if (PyModule_AddObject(mod, "ONE", PyLong_FromLong(1)) < 0) {
		return -1;
		}
		return 0;
		}