diff -r 1a0384d12165 Lib/test/test_functools.py --- a/Lib/test/test_functools.py Sun Jun 07 00:00:48 2015 -0500 +++ b/Lib/test/test_functools.py Sun Jun 07 09:43:00 2015 +0300 @@ -1170,6 +1170,37 @@ class TestLRU: def f(): pass + def test_lru_method(self): + class X(int): + f_cnt = 0 + @self.module.lru_cache(2) + def f(self, x): + self.f_cnt += 1 + return x*10+self + a = X(5) + b = X(5) + c = X(7) + self.assertEqual(X.f.cache_info(), (0, 0, 2, 0)) + + for x in 1, 2, 2, 3, 1, 1, 1, 2, 3, 3: + self.assertEqual(a.f(x), x*10 + 5) + self.assertEqual((a.f_cnt, b.f_cnt, c.f_cnt), (6, 0, 0)) + self.assertEqual(X.f.cache_info(), (4, 6, 2, 2)) + + for x in 1, 2, 1, 1, 1, 1, 3, 2, 2, 2: + self.assertEqual(b.f(x), x*10 + 5) + self.assertEqual((a.f_cnt, b.f_cnt, c.f_cnt), (6, 4, 0)) + self.assertEqual(X.f.cache_info(), (10, 10, 2, 2)) + + for x in 2, 1, 1, 1, 1, 2, 1, 3, 2, 1: + self.assertEqual(c.f(x), x*10 + 7) + self.assertEqual((a.f_cnt, b.f_cnt, c.f_cnt), (6, 4, 5)) + self.assertEqual(X.f.cache_info(), (15, 15, 2, 2)) + + self.assertEqual(a.f.cache_info(), X.f.cache_info()) + self.assertEqual(b.f.cache_info(), X.f.cache_info()) + self.assertEqual(c.f.cache_info(), X.f.cache_info()) + class TestLRUC(TestLRU, unittest.TestCase): module = c_functools diff -r 1a0384d12165 Modules/_functoolsmodule.c --- a/Modules/_functoolsmodule.c Sun Jun 07 00:00:48 2015 -0500 +++ b/Modules/_functoolsmodule.c Sun Jun 07 09:43:00 2015 +0300 @@ -1004,6 +1004,16 @@ lru_cache_call(lru_cache_object *self, P } static PyObject * +lru_cache_descr_get(PyObject *self, PyObject *obj, PyObject *type) +{ + if (obj == Py_None || obj == NULL) { + Py_INCREF(self); + return self; + } + return PyMethod_New(self, obj); +} + +static PyObject * lru_cache_cache_info(lru_cache_object *self, PyObject *unused) { return PyObject_CallFunction(self->cache_info_type, "nnOn", @@ -1115,7 +1125,7 @@ static PyTypeObject lru_cache_type = { lru_cache_getsetlist, /* tp_getset */ 0, /* tp_base */ 0, /* tp_dict */ - 0, /* tp_descr_get */ + lru_cache_descr_get, /* tp_descr_get */ 0, /* tp_descr_set */ offsetof(lru_cache_object, dict), /* tp_dictoffset */ 0, /* tp_init */