[issue36643] Forward reference is not resolved by dataclasses.fields()

Eric V. Smith added the comment: I agree with Jelle here: dataclasses shouldn't be calling get_type_hints(). -- resolution: -> wont fix stage: patch review -> resolved status: open -> closed ___ Python tracker

[issue36643] Forward reference is not resolved by dataclasses.fields()

Jelle Zijlstra added the comment: I don't think we should merge this change. get_type_hints() is fragile and full of corner cases around using the right globals and locals dictionaries. dataclasses shouldn't execute it implicitly for you. -- nosy: +Jelle Zijlstra versions: +Python 3.

[issue36643] Forward reference is not resolved by dataclasses.fields()

Eric V. Smith added the comment: Also, when dataclasses was originally written, it deliberately did not import typing, for performance reasons. I don't know if PEP 560 (I think) improved performance enough to make a difference. But adding this dependency needs to be looked at. But if we are

[issue36643] Forward reference is not resolved by dataclasses.fields()

Eric V. Smith added the comment: I’m deferring any action on this until PEP 649 is ruled on. -- assignee: -> eric.smith ___ Python tracker ___

[issue36643] Forward reference is not resolved by dataclasses.fields()

Change by Misha Drachuk : -- keywords: +patch pull_requests: +25873 stage: -> patch review pull_request: https://github.com/python/cpython/pull/27330 ___ Python tracker ___ __

[issue36643] Forward reference is not resolved by dataclasses.fields()

Eric V. Smith added the comment: It can’t be resolved in fields(): it is still undefined when the fields are created. I think the best solution is PEP 649. -- ___ Python tracker ___

[issue36643] Forward reference is not resolved by dataclasses.fields()

Paolo Lammens added the comment: I was about to create the exact same ticket; I'm nudging this. -- nosy: +plammens ___ Python tracker ___ _

[issue36643] Forward reference is not resolved by dataclasses.fields()

Change by Ivan Levkivskyi : -- nosy: +levkivskyi ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail

[issue36643] Forward reference is not resolved by dataclasses.fields()

Change by Karthikeyan Singaravelan : -- nosy: +eric.smith ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe: htt

[issue36643] Forward reference is not resolved by dataclasses.fields()

New submission from Misha Drachuk : Forward reference is not resolved by `dataclasses.fields()`, but it works with `typing.get_type_hints()`. E.g. from dataclasses import dataclass, fields from typing import Optional, get_type_hints @dataclass class Nestable: child: Optional['Nestable']