Re: Why cannot I use __slots__ and weakrefs together?

[Gregory Ewing]

Steven D'Aprano wrote:

TypeError: cannot create weak reference to 'Eggs' object

Why does weakref hate my Eggs class?

Classes with __slots__ aren't automatically given a __weakref__ slot,
to save memory I suppose.

But you can give it one explicitly:

>>> class Eggs:
...   __slots__ = ['spanish_inquisition', '__weakref__']
...
>>> e = Eggs()
>>> d['b'] = e
>>>

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Greg
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