On 04/04/2019 13.51, Jeroen Demeyer wrote: > During my investigations related to low-level function/method classes, I > came across the "instance method" class. There is a C API for it: > https://docs.python.org/3.7/c-api/method.html > However, it's not used/exposed anywhere in CPython, except as > _testcapi.instancemethod (for testing its functionality) > > This class was discussed at > https://mail.python.org/pipermail/python-3000/2007-December/011456.html > and implemented in https://bugs.python.org/issue1587 > Reading that old thread, there are use cases presented related to > classic classes, wrapping Kogut > (http://kokogut.sourceforge.net/kogut.html) objects and Pyrex. But > classic classes no longer exist and the latter two use cases aren't > actually needed if you read the thread to the end. So there are no > surviving use cases from that thread. > > Does anybody know actual use cases or any code in the wild using it? To > me, the fact that it's only exposed in the C API is a good sign that > it's not really useful.
You are drawing the wrong conclusion here. The feature was explicitly designed for C code and C API wrappers like swig and Cython to make adaption to Python 3 simpler. I implemented it when I removed unbound methods. > So, should we deprecate the instance method class? I couldn't find any current code that uses PyInstanceMethod_New. Let's deprecate the feature and schedule it for removal in 3.10. Christian _______________________________________________ Python-Dev mailing list Python-Dev@python.org https://mail.python.org/mailman/listinfo/python-dev Unsubscribe: https://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
