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> Seems like a duplicate of #20309.
My usecase is to avoid any behavior difference between io.open and _pyio.open functions: PEP 399 "Pure Python/C Accelerator Module Compatibility Requirements". Currently, this is a very subtle difference when it's used to define a method.
I dislike the current _pyio.OpenWrapper "hack". I would prefer that _pyio.open would be directly usable to define a method. I propose to use @staticmethod, but I am open to other ideas. It could be a new decorator: @staticmethod_or_function.
Is it worth it to introduce a new @staticmethod_or_function decorator just to leave @staticmethod unchanged?
Note: The PEP 570 "Python Positional-Only Parameters" (implemented in Python 3.8) removed another subtle difference between functions implemented in C and functions implemented in Python. Now functions implemented in Python can only have positional only parameters.