我们从Python开源项目中，提取了以下44个代码示例，用于说明如何使用weakref.getweakrefcount()。
def test_ref_reuse(self): o = C() ref1 = weakref.ref(o) # create a proxy to make sure that there's an intervening creation # between these two; it should make no difference proxy = weakref.proxy(o) ref2 = weakref.ref(o) self.assertTrue(ref1 is ref2, "reference object w/out callback should be re-used") o = C() proxy = weakref.proxy(o) ref1 = weakref.ref(o) ref2 = weakref.ref(o) self.assertTrue(ref1 is ref2, "reference object w/out callback should be re-used") self.assertTrue(weakref.getweakrefcount(o) == 2, "wrong weak ref count for object") del proxy gc_collect() self.assertTrue(weakref.getweakrefcount(o) == 1, "wrong weak ref count for object after deleting proxy")
def test_getweakrefcount(self): o = C() ref1 = weakref.ref(o) ref2 = weakref.ref(o, self.callback) self.assertTrue(weakref.getweakrefcount(o) == 2, "got wrong number of weak reference objects") proxy1 = weakref.proxy(o) proxy2 = weakref.proxy(o, self.callback) self.assertTrue(weakref.getweakrefcount(o) == 4, "got wrong number of weak reference objects") del ref1, ref2, proxy1, proxy2 gc_collect() self.assertTrue(weakref.getweakrefcount(o) == 0, "weak reference objects not unlinked from" " referent when discarded.") # assumes ints do not support weakrefs self.assertTrue(weakref.getweakrefcount(1) == 0, "got wrong number of weak reference objects for int")
def test_subclass_refs_dont_replace_standard_refs(self): class MyRef(weakref.ref): pass o = Object(42) r1 = MyRef(o) r2 = weakref.ref(o) self.assertTrue(r1 is not r2) self.assertEqual(weakref.getweakrefs(o), [r2, r1]) self.assertEqual(weakref.getweakrefcount(o), 2) r3 = MyRef(o) self.assertEqual(weakref.getweakrefcount(o), 3) refs = weakref.getweakrefs(o) self.assertEqual(len(refs), 3) self.assertTrue(r2 is refs[0]) self.assertIn(r1, refs[1:]) self.assertIn(r3, refs[1:])
def test_ref_reuse(self): o = C() ref1 = weakref.ref(o) # create a proxy to make sure that there's an intervening creation # between these two; it should make no difference proxy = weakref.proxy(o) ref2 = weakref.ref(o) self.assertIs(ref1, ref2, "reference object w/out callback should be re-used") o = C() proxy = weakref.proxy(o) ref1 = weakref.ref(o) ref2 = weakref.ref(o) self.assertIs(ref1, ref2, "reference object w/out callback should be re-used") self.assertEqual(weakref.getweakrefcount(o), 2, "wrong weak ref count for object") del proxy self.assertEqual(weakref.getweakrefcount(o), 1, "wrong weak ref count for object after deleting proxy")
def test_getweakrefcount(self): o = C() ref1 = weakref.ref(o) ref2 = weakref.ref(o, self.callback) self.assertEqual(weakref.getweakrefcount(o), 2, "got wrong number of weak reference objects") proxy1 = weakref.proxy(o) proxy2 = weakref.proxy(o, self.callback) self.assertEqual(weakref.getweakrefcount(o), 4, "got wrong number of weak reference objects") del ref1, ref2, proxy1, proxy2 self.assertEqual(weakref.getweakrefcount(o), 0, "weak reference objects not unlinked from" " referent when discarded.") # assumes ints do not support weakrefs self.assertEqual(weakref.getweakrefcount(1), 0, "got wrong number of weak reference objects for int")
def test_subclass_refs_dont_replace_standard_refs(self): class MyRef(weakref.ref): pass o = Object(42) r1 = MyRef(o) r2 = weakref.ref(o) self.assertIsNot(r1, r2) self.assertEqual(weakref.getweakrefs(o), [r2, r1]) self.assertEqual(weakref.getweakrefcount(o), 2) r3 = MyRef(o) self.assertEqual(weakref.getweakrefcount(o), 3) refs = weakref.getweakrefs(o) self.assertEqual(len(refs), 3) self.assertIs(r2, refs[0]) self.assertIn(r1, refs[1:]) self.assertIn(r3, refs[1:])
def test_ref_reuse(self): o = C() ref1 = weakref.ref(o) # create a proxy to make sure that there's an intervening creation # between these two; it should make no difference proxy = weakref.proxy(o) ref2 = weakref.ref(o) self.assertTrue(ref1 is ref2, "reference object w/out callback should be re-used") o = C() proxy = weakref.proxy(o) ref1 = weakref.ref(o) ref2 = weakref.ref(o) self.assertTrue(ref1 is ref2, "reference object w/out callback should be re-used") self.assertTrue(weakref.getweakrefcount(o) == 2, "wrong weak ref count for object") del proxy self.assertTrue(weakref.getweakrefcount(o) == 1, "wrong weak ref count for object after deleting proxy")
def test_getweakrefcount(self): o = C() ref1 = weakref.ref(o) ref2 = weakref.ref(o, self.callback) self.assertTrue(weakref.getweakrefcount(o) == 2, "got wrong number of weak reference objects") proxy1 = weakref.proxy(o) proxy2 = weakref.proxy(o, self.callback) self.assertTrue(weakref.getweakrefcount(o) == 4, "got wrong number of weak reference objects") del ref1, ref2, proxy1, proxy2 self.assertTrue(weakref.getweakrefcount(o) == 0, "weak reference objects not unlinked from" " referent when discarded.") # assumes ints do not support weakrefs self.assertTrue(weakref.getweakrefcount(1) == 0, "got wrong number of weak reference objects for int")
def test_ref_reuse(self): o = C() ref1 = weakref.ref(o) # create a proxy to make sure that there's an intervening creation # between these two; it should make no difference proxy = weakref.proxy(o) ref2 = weakref.ref(o) self.assertIs(ref1, ref2, "reference object w/out callback should be re-used") o = C() proxy = weakref.proxy(o) ref1 = weakref.ref(o) ref2 = weakref.ref(o) self.assertIs(ref1, ref2, "reference object w/out callback should be re-used") self.assertEqual(weakref.getweakrefcount(o), 2, "wrong weak ref count for object") del proxy gc_collect() self.assertEqual(weakref.getweakrefcount(o), 1, "wrong weak ref count for object after deleting proxy")
def test_getweakrefcount(self): o = C() ref1 = weakref.ref(o) ref2 = weakref.ref(o, self.callback) self.assertEqual(weakref.getweakrefcount(o), 2, "got wrong number of weak reference objects") proxy1 = weakref.proxy(o) proxy2 = weakref.proxy(o, self.callback) self.assertEqual(weakref.getweakrefcount(o), 4, "got wrong number of weak reference objects") del ref1, ref2, proxy1, proxy2 gc_collect() self.assertEqual(weakref.getweakrefcount(o), 0, "weak reference objects not unlinked from" " referent when discarded.") # assumes ints do not support weakrefs self.assertEqual(weakref.getweakrefcount(1), 0, "got wrong number of weak reference objects for int")
def test_subclass_refs_dont_replace_standard_refs(self): class MyRef(weakref.ref): pass o = Object(42) r1 = MyRef(o) r2 = weakref.ref(o) self.assertIsNot(r1, r2) self.assertEqual(weakref.getweakrefs(o), [r2, r1]) self.assertEqual(weakref.getweakrefcount(o), 2) r3 = MyRef(o) self.assertEqual(weakref.getweakrefcount(o), 3) refs = weakref.getweakrefs(o) self.assertEqual(len(refs), 3) assert set(refs) == set((r1, r2, r3)) if test_support.check_impl_detail(): self.assertIs(r2, refs[0]) self.assertIn(r1, refs[1:]) self.assertIn(r3, refs[1:])
def test_weakref_works_on_nodes(self): c1 = c_ast.Constant(type='float', value='3.14') wr = weakref.ref(c1) cref = wr() self.assertEqual(cref.type, 'float') self.assertEqual(weakref.getweakrefcount(c1), 1)
def test_weakref_works_on_coord(self): coord = plyparser.Coord(file='a', line=2) wr = weakref.ref(coord) cref = wr() self.assertEqual(cref.line, 2) self.assertEqual(weakref.getweakrefcount(coord), 1)
def test_weak_values(self): # # This exercises d.copy(), d.items(), d[], del d[], len(d). # dict, objects = self.make_weak_valued_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1) self.assertTrue(o is dict[o.arg], "wrong object returned by weak dict!") items1 = list(dict.items()) items2 = list(dict.copy().items()) items1.sort() items2.sort() self.assertEqual(items1, items2, "cloning of weak-valued dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] gc_collect() self.assertEqual(len(dict), self.COUNT - 1, "deleting object did not cause dictionary update") del objects, o gc_collect() self.assertEqual(len(dict), 0, "deleting the values did not clear the dictionary") # regression on SF bug #447152: dict = weakref.WeakValueDictionary() self.assertRaises(KeyError, dict.__getitem__, 1) dict[2] = C() gc_collect() self.assertRaises(KeyError, dict.__getitem__, 2)
def test_weak_keys(self): # # This exercises d.copy(), d.items(), d[] = v, d[], del d[], # len(d), k in d. # dict, objects = self.make_weak_keyed_dict() for o in objects: self.assertTrue(weakref.getweakrefcount(o) == 1, "wrong number of weak references to %r!" % o) self.assertTrue(o.arg is dict[o], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() self.assertEqual(set(items1), set(items2), "cloning of weak-keyed dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] gc_collect() self.assertTrue(len(dict) == (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o gc_collect() self.assertTrue(len(dict) == 0, "deleting the keys did not clear the dictionary") o = Object(42) dict[o] = "What is the meaning of the universe?" self.assertIn(o, dict) self.assertNotIn(34, dict)
def test_weak_values(self): # # This exercises d.copy(), d.items(), d[], del d[], len(d). # dict, objects = self.make_weak_valued_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1, "wrong number of weak references to %r!" % o) self.assertIs(o, dict[o.arg], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() items1.sort() items2.sort() self.assertEqual(items1, items2, "cloning of weak-valued dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] self.assertEqual(len(dict), (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o self.assertEqual(len(dict), 0, "deleting the values did not clear the dictionary") # regression on SF bug #447152: dict = weakref.WeakValueDictionary() self.assertRaises(KeyError, dict.__getitem__, 1) dict[2] = C() self.assertRaises(KeyError, dict.__getitem__, 2)
def test_weak_keys(self): # # This exercises d.copy(), d.items(), d[] = v, d[], del d[], # len(d), in d. # dict, objects = self.make_weak_keyed_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1, "wrong number of weak references to %r!" % o) self.assertIs(o.arg, dict[o], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() self.assertEqual(set(items1), set(items2), "cloning of weak-keyed dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] self.assertEqual(len(dict), (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o self.assertEqual(len(dict), 0, "deleting the keys did not clear the dictionary") o = Object(42) dict[o] = "What is the meaning of the universe?" self.assertIn(o, dict) self.assertNotIn(34, dict)
def test_weak_values(self): # # This exercises d.copy(), d.items(), d[], del d[], len(d). # dict, objects = self.make_weak_valued_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1) self.assertTrue(o is dict[o.arg], "wrong object returned by weak dict!") items1 = list(dict.items()) items2 = list(dict.copy().items()) items1.sort() items2.sort() self.assertEqual(items1, items2, "cloning of weak-valued dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] self.assertEqual(len(dict), self.COUNT - 1, "deleting object did not cause dictionary update") del objects, o self.assertEqual(len(dict), 0, "deleting the values did not clear the dictionary") # regression on SF bug #447152: dict = weakref.WeakValueDictionary() self.assertRaises(KeyError, dict.__getitem__, 1) dict[2] = C() self.assertRaises(KeyError, dict.__getitem__, 2)
def test_weak_keys(self): # # This exercises d.copy(), d.items(), d[] = v, d[], del d[], # len(d), k in d. # dict, objects = self.make_weak_keyed_dict() for o in objects: self.assertTrue(weakref.getweakrefcount(o) == 1, "wrong number of weak references to %r!" % o) self.assertTrue(o.arg is dict[o], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() self.assertEqual(set(items1), set(items2), "cloning of weak-keyed dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] self.assertTrue(len(dict) == (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o self.assertTrue(len(dict) == 0, "deleting the keys did not clear the dictionary") o = Object(42) dict[o] = "What is the meaning of the universe?" self.assertIn(o, dict) self.assertNotIn(34, dict)
def test_weak_values(self): # # This exercises d.copy(), d.items(), d[], del d[], len(d). # dict, objects = self.make_weak_valued_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1, "wrong number of weak references to %r!" % o) self.assertIs(o, dict[o.arg], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() items1.sort() items2.sort() self.assertEqual(items1, items2, "cloning of weak-valued dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] gc_collect() self.assertEqual(len(dict), (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o gc_collect() self.assertEqual(len(dict), 0, "deleting the values did not clear the dictionary") # regression on SF bug #447152: dict = weakref.WeakValueDictionary() self.assertRaises(KeyError, dict.__getitem__, 1) dict[2] = C() gc_collect() self.assertRaises(KeyError, dict.__getitem__, 2)
def test_weak_keys(self): # # This exercises d.copy(), d.items(), d[] = v, d[], del d[], # len(d), in d. # dict, objects = self.make_weak_keyed_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1, "wrong number of weak references to %r!" % o) self.assertIs(o.arg, dict[o], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() self.assertEqual(set(items1), set(items2), "cloning of weak-keyed dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] gc_collect() self.assertEqual(len(dict), (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o gc_collect() self.assertEqual(len(dict), 0, "deleting the keys did not clear the dictionary") o = Object(42) dict[o] = "What is the meaning of the universe?" self.assertIn(o, dict) self.assertNotIn(34, dict)
def test_weak_values(self): # # This exercises d.copy(), d.items(), d[], del d[], len(d). # dict, objects = self.make_weak_valued_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1) self.assertIs(o, dict[o.arg], "wrong object returned by weak dict!") items1 = list(dict.items()) items2 = list(dict.copy().items()) items1.sort() items2.sort() self.assertEqual(items1, items2, "cloning of weak-valued dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] self.assertEqual(len(dict), self.COUNT - 1, "deleting object did not cause dictionary update") del objects, o self.assertEqual(len(dict), 0, "deleting the values did not clear the dictionary") # regression on SF bug #447152: dict = weakref.WeakValueDictionary() self.assertRaises(KeyError, dict.__getitem__, 1) dict[2] = C() self.assertRaises(KeyError, dict.__getitem__, 2)
def test_weak_keys(self): # # This exercises d.copy(), d.items(), d[] = v, d[], del d[], # len(d), k in d. # dict, objects = self.make_weak_keyed_dict() for o in objects: self.assertEqual(weakref.getweakrefcount(o), 1, "wrong number of weak references to %r!" % o) self.assertIs(o.arg, dict[o], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() self.assertEqual(set(items1), set(items2), "cloning of weak-keyed dictionary did not work!") del items1, items2 self.assertEqual(len(dict), self.COUNT) del objects[0] self.assertEqual(len(dict), (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o self.assertEqual(len(dict), 0, "deleting the keys did not clear the dictionary") o = Object(42) dict[o] = "What is the meaning of the universe?" self.assertIn(o, dict) self.assertNotIn(34, dict)
def test_weak_values(self): # # This exercises d.copy(), d.items(), d[], del d[], len(d). # dict, objects = self.make_weak_valued_dict() for o in objects: self.assertTrue(weakref.getweakrefcount(o) == 1, "wrong number of weak references to %r!" % o) self.assertTrue(o is dict[o.arg], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() items1.sort() items2.sort() self.assertTrue(items1 == items2, "cloning of weak-valued dictionary did not work!") del items1, items2 self.assertTrue(len(dict) == self.COUNT) del objects[0] self.assertTrue(len(dict) == (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o self.assertTrue(len(dict) == 0, "deleting the values did not clear the dictionary") # regression on SF bug #447152: dict = weakref.WeakValueDictionary() self.assertRaises(KeyError, dict.__getitem__, 1) dict[2] = C() self.assertRaises(KeyError, dict.__getitem__, 2)
def test_weak_keys(self): # # This exercises d.copy(), d.items(), d[] = v, d[], del d[], # len(d), in d. # dict, objects = self.make_weak_keyed_dict() for o in objects: self.assertTrue(weakref.getweakrefcount(o) == 1, "wrong number of weak references to %r!" % o) self.assertTrue(o.arg is dict[o], "wrong object returned by weak dict!") items1 = dict.items() items2 = dict.copy().items() self.assertTrue(set(items1) == set(items2), "cloning of weak-keyed dictionary did not work!") del items1, items2 self.assertTrue(len(dict) == self.COUNT) del objects[0] self.assertTrue(len(dict) == (self.COUNT - 1), "deleting object did not cause dictionary update") del objects, o self.assertTrue(len(dict) == 0, "deleting the keys did not clear the dictionary") o = Object(42) dict[o] = "What is the meaning of the universe?" self.assertIn(o, dict) self.assertNotIn(34, dict)
