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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Support pickling of super object","articleBody":"# Feature or enhancement\n\nAs was noted in https://github.com/python/cpython/issues/125714#issuecomment-2423259145, the `super` object is not pickleable. For example:\n\n```py\nimport pickle\nclass X: pass\ns = super(X, X())\npickle.dumps(s)\n```\nProduces a traceback:\n```pytb\nTraceback (most recent call last):\n  File \"\u003cpython-input-0\u003e\", line 4, in \u003cmodule\u003e\n    pickle.dumps(s)\n    ~~~~~~~~~~~~^^^\n_pickle.PicklingError: first argument to __newobj__() must be \u003cclass 'super'\u003e, not \u003cclass '__main__.X'\u003e\nwhen serializing super object\n```\nThis is because the special methods like `__reduce_ex__()` are looked up in an instance and translated to a lookup in the underlying object.\n```pycon\n\u003e\u003e\u003e super(X, X()).__reduce_ex__(5)\n(\u003cfunction __newobj__ at 0x7fd9e8a0ad50\u003e, (\u003cclass '__main__.X'\u003e,), None, None, None)\n```\nThis cannot be solved by implementing the `__reduce_ex__()` method in the `super` class, because the current behavior is expected when `super()` is used in the `__reduce_ex__()` implementation of some subclass. The `super` class likely should be registered in the global dispatch table.\n\nThere may be similar issue with shallow and deep copying.\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-125781\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/serhiy-storchaka","@type":"Person","name":"serhiy-storchaka"},"datePublished":"2024-10-21T06:04:07.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/125767/cpython/issues/125767"}