test_weakref.py 文件源码

def test_proxy_div(self):
        class C:
            def __floordiv__(self, other):
                return 42
            def __ifloordiv__(self, other):
                return 21
        o = C()
        p = weakref.proxy(o)
        self.assertEqual(p // 5, 42)
        p //= 5
        self.assertEqual(p, 21)

    # The PyWeakref_* C API is documented as allowing either NULL or
    # None as the value for the callback, where either means "no
    # callback".  The "no callback" ref and proxy objects are supposed
    # to be shared so long as they exist by all callers so long as
    # they are active.  In Python 2.3.3 and earlier, this guarantee
    # was not honored, and was broken in different ways for
    # PyWeakref_NewRef() and PyWeakref_NewProxy().  (Two tests.)