str(weakref) throws error KeyError: '__name__' if the original obj override __getattr__ #99184
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class MyConfig(dict): def __getattr__(self, x): return self[x] obj = MyConfig(offset=5) obj_weakref = weakref.ref(obj) str(obj_weakref) # raise error: KeyError: '__name__' Error:
Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<stdin>", line 3, in __getattr__ KeyError: '__name__' Your environment
- CPython versions tested on: python 3.8 & 3.9
- Operating system and architecture: Ubuntu Linux and MacOS