New submission from Rick Teachey <ri...@teachey.org>: Summary: The descriptor `__set_name__` functionality (introduced in Python 3.6) does not seem to be working correctly for `dataclass.Field` objects with a default pointing to a descriptor. I have attached a file demonstrating the trouble.
Details: If I set a `dataclass` class object field to a `dataclass.field` with a descriptor object for the `default` argument, the descriptor's `__set_name__` method is not called during initialization. This is unexpected because descriptors themselves seem to work pretty much flawlessly, otherwise. (Bravo on that by the way! Working descriptors isn't mentioned at all in the PEP as a feature but I was very pleased to see them working!!) System details: Python 3.7b02 Windows 10 PyCharm Community Edition btw this is my first ever Python bug report; I hope I did a good job. ---------- files: broken__set_name__.py messages: 314438 nosy: Ricyteach, eric.smith priority: normal severity: normal status: open title: descriptor __set_name__ feature broken for dataclass descriptor fields type: behavior versions: Python 3.7 Added file: https://bugs.python.org/file47499/broken__set_name__.py _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue33141> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
