在Python中腌制weakref

在Python中腌制weakref

你绝对可以泡菜a

weakref

，泡菜a

dict

和a

list

。但是，实际上它们包含的内容很重要。如果

dict

或

list

包含不可拾取的intem，则酸洗将失败。如果您想泡菜

weakref

，就必须使用

dill

而不是

pickle

。

weakref

但是，未经挑选的反序列化为无效参考。

>>> import dill>>> import weakref>>> dill.loads(dill.dumps(weakref.WeakKeyDictionary()))<WeakKeyDictionary at 4528979192>>>> dill.loads(dill.dumps(weakref.WeakValueDictionary()))<WeakValueDictionary at 4528976888>>>> class _class:...   def _method(self):...     pass... >>> _instance = _class()>>> dill.loads(dill.dumps(weakref.ref(_instance)))<weakref at 0x10d748940; dead>>>> dill.loads(dill.dumps(weakref.ref(_class())))<weakref at 0x10e246a48; dead>>>> dill.loads(dill.dumps(weakref.proxy(_instance)))<weakproxy at 0x10e246b50 to NoneType at 0x10d481598>>>> dill.loads(dill.dumps(weakref.proxy(_class())))<weakproxy at 0x10e246ba8 to NoneType at 0x10d481598>