diff --git a/Lib/test/test_descr.py b/Lib/test/test_descr.py index 4a3db80ca43..fd0af9b30a0 100644 --- a/Lib/test/test_descr.py +++ b/Lib/test/test_descr.py @@ -5004,6 +5004,21 @@ class ClassPropertiesAndMethods(unittest.TestCase): gc.collect() self.assertEqual(Parent.__subclasses__(), []) + def test_instance_method_get_behavior(self): + # test case for gh-113157 + + class A: + def meth(self): + return self + + class B: + pass + + a = A() + b = B() + b.meth = a.meth.__get__(b, B) + self.assertEqual(b.meth(), a) + def test_attr_raise_through_property(self): # test case for gh-103272 class A: diff --git a/Objects/classobject.c b/Objects/classobject.c index 618d88894de..d7e520f556d 100644 --- a/Objects/classobject.c +++ b/Objects/classobject.c @@ -319,6 +319,13 @@ method_traverse(PyMethodObject *im, visitproc visit, void *arg) return 0; } +static PyObject * +method_descr_get(PyObject *meth, PyObject *obj, PyObject *cls) +{ + Py_INCREF(meth); + return meth; +} + PyTypeObject PyMethod_Type = { PyVarObject_HEAD_INIT(&PyType_Type, 0) .tp_name = "method", @@ -339,6 +346,7 @@ PyTypeObject PyMethod_Type = { .tp_methods = method_methods, .tp_members = method_memberlist, .tp_getset = method_getset, + .tp_descr_get = method_descr_get, .tp_new = method_new, };