test_weakref.py 文件源码

def check_proxy(self, o, proxy):
        o.foo = 1
        self.assertTrue(proxy.foo == 1,
                     "proxy does not reflect attribute addition")
        o.foo = 2
        self.assertTrue(proxy.foo == 2,
                     "proxy does not reflect attribute modification")
        del o.foo
        self.assertTrue(not hasattr(proxy, 'foo'),
                     "proxy does not reflect attribute removal")

        proxy.foo = 1
        self.assertTrue(o.foo == 1,
                     "object does not reflect attribute addition via proxy")
        proxy.foo = 2
        self.assertTrue(
            o.foo == 2,
            "object does not reflect attribute modification via proxy")
        del proxy.foo
        self.assertTrue(not hasattr(o, 'foo'),
                     "object does not reflect attribute removal via proxy")