New submission from Trey Hunner <trey@truthful.technology>:
When making a dataclass with slots=True and frozen=True, assigning to an invalid attribute raises a TypeError rather than a FrozenInstanceError: >>> from dataclasses import dataclass >>> @dataclass(frozen=True, slots=True) ... class Vector: ... x: float ... y: float ... z: float ... >>> v = Vector(1, 2, 3) >>> v.a = 4 Traceback (most recent call last): File "<stdin>", line 1, in <module> File "<string>", line 5, in __setattr__ TypeError: super(type, obj): obj must be an instance or subtype of type ---------- messages: 406973 nosy: trey priority: normal severity: normal status: open title: Frozen dataclasses with slots raise TypeError type: behavior versions: Python 3.10 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue45897> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
