New submission from Justin Capella <justincape...@gmail.com>:
When subclassing the ctypes.Structure class, __new__ and __init__ are not invoked when using the inherited classmethod from_buffer_copy to create the object. I think this is because tp_alloc is ultimately used by GenericPyCData_new when creating the object using the from_buffer_copy classmethod inherited from _CData. https://github.com/python/cpython/blob/be143ec99674ba38c5811f34cdb85ef39c2dc8f8/Modules/_ctypes/_ctypes.c#L3202 Expected behavior: creation of Structure subclass object would invoke __new__ and possibly __init__. ---------- components: ctypes files: ctypesnew.py messages: 357022 nosy: b1tninja priority: normal severity: normal status: open title: GenericPyCData_new does not invoke new or init type: behavior versions: Python 2.7, Python 3.5, Python 3.6, Python 3.7, Python 3.8, Python 3.9 Added file: https://bugs.python.org/file48723/ctypesnew.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38860> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
