[issue46970] dataclass(slots=True) incompatible with __init_subclass__

Eric V. Smith added the comment: This appears to be due to dataclasses needing to create a new class in order to set __slots__. I'll look at it, but I doubt there's anything that can be done. attrs has the same issue: File "x/.local/lib/python3.8/site-packages/attr/_make.py", line 889,

[issue46970] dataclass(slots=True) incompatible with __init_subclass__

Change by Guido Imperiale : -- type: -> crash ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue46970] dataclass(slots=True) incompatible with __init_subclass__

Change by Guido Imperiale : -- nosy: +eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue46970] dataclass(slots=True) incompatible with __init_subclass__

New submission from Guido Imperiale : Related to #46382 A class decorated with dataclass(slots=True) can't pass any parameters to the __init_subclass__ method of its parent class. from dataclasses import dataclass class A: __slots__ = () def __init_subclass__(cls, msg):