Class MyRef

Lib/test/test_weakref.py:1077–1083

    def test_subclass_refs(self):
        class MyRef(weakref.ref):
            def __init__(self, ob, callback=None, value=42):
                self.value = value
                super().__init__(ob, callback)
            def __call__(self):
                self.called = True
                return super().__call__()
        o = Object("foo")
        mr = MyRef(o, value=24)
        self.assertIs(mr(), o)