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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"str(weakref) throws error `KeyError: '__name__'` if the original obj override __getattr__","articleBody":"\u003c!--\r\n  If you're new to Python and you're not sure whether what you're experiencing is a bug, the CPython issue tracker is not\r\n  the right place to seek help. Consider the following options instead:\r\n\r\n  - reading the Python tutorial: https://docs.python.org/3/tutorial/\r\n  - posting in the \"Users\" category on discuss.python.org: https://discuss.python.org/c/users/7\r\n  - emailing the Python-list mailing list: https://mail.python.org/mailman/listinfo/python-list\r\n  - searching our issue tracker (https://github.com/python/cpython/issues) to see if\r\n    your problem has already been reported\r\n--\u003e\r\n\r\n# Bug report\r\n\r\nA clear and concise description of what the bug is.\r\nInclude a minimal, reproducible example (https://stackoverflow.com/help/minimal-reproducible-example), if possible.\r\n\r\nRepo:\r\n```\r\nclass MyConfig(dict):\r\n    def __getattr__(self, x):\r\n        return self[x]\r\n\r\nobj = MyConfig(offset=5)\r\nobj_weakref = weakref.ref(obj)\r\nstr(obj_weakref)  # raise error: KeyError: '__name__'\r\n```\r\nError:\r\n```\r\nTraceback (most recent call last):\r\n  File \"\u003cstdin\u003e\", line 1, in \u003cmodule\u003e\r\n  File \"\u003cstdin\u003e\", line 3, in __getattr__\r\nKeyError: '__name__'\r\n```\r\n\r\n# Your environment\r\n\r\n\u003c!-- Include as many relevant details as possible about the environment you experienced the bug in --\u003e\r\n\r\n- CPython versions tested on: python 3.8 \u0026 3.9\r\n- Operating system and architecture: Ubuntu Linux and MacOS\r\n\r\n\u003c!--\r\nYou can freely edit this text. Remove any lines you believe are unnecessary.\r\n--\u003e\r\n\n\n\u003c!-- gh-pr-number: gh-99244 --\u003e\n* PR: gh-99244\n\u003c!-- /gh-pr-number --\u003e\n\n\n\u003c!-- gh-pr-number: gh-103789 --\u003e\n* PR: gh-103789\n\u003c!-- /gh-pr-number --\u003e\n","author":{"url":"https://github.com/yanboliang","@type":"Person","name":"yanboliang"},"datePublished":"2022-11-07T04:31:23.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":6},"url":"https://github.com/99184/cpython/issues/99184"}