python / python/cpython

Dataclass transform should ignore TypeAlias variables

Open
#91,322 5 comments 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

3.10 3.11 3.9 (EOL) stdlib topic-dataclasses topic-typing type-bug
Dominant language
Python
Stars
77.2k
Forks
36k
PR merge metrics
PR metrics pending

Description

BPO 47166
Nosy @ericvsmith, @JelleZijlstra, @AlexWaygood, @GBeauregard, @thomkeh

Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.

Show more details

GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2022-03-30.14:49:32.604>
labels = ['type-bug', '3.8', '3.9', '3.10', '3.11', '3.7', 'library']
title = 'Dataclass transform should ignore TypeAlias variables'
updated_at = <Date 2022-04-06.22:47:22.436>
user = 'https://github.com/thomkeh'

bugs.python.org fields:

activity = <Date 2022-04-06.22:47:22.436>
actor = 'thomkeh'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2022-03-30.14:49:32.604>
creator = 'thomkeh'
dependencies = []
files = []
hgrepos = []
issue_num = 47166
keywords = []
message_count = 5.0
messages = ['416368', '416414', '416426', '416428', '416903']
nosy_count = 5.0
nosy_names = ['eric.smith', 'JelleZijlstra', 'AlexWaygood', 'GBeauregard', 'thomkeh']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue47166'
versions = ['Python 3.7', 'Python 3.8', 'Python 3.9', 'Python 3.10', 'Python 3.11']

Contributor guide

Open the contributing guide

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

No file or test is named in the issue. Begin by locating CPython's dataclass-transform handling for TypeAlias variables, reproduce the reported behavior, and add regression coverage; done means TypeAlias variables are ignored as requested.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
backend
Issue type
Bug
Difficulty
3/5
Estimated time
1-2 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
35/100

Get new issues in your inbox

A short digest of beginner-friendly GitHub issues.