python / python/cpython

typing.get_type_hints with TYPE_CHECKING imports / getting hints for single argument

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3.10 3.9 (EOL) stdlib topic-typing type-bug
Dominant language
Python
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Description

BPO 43463
Nosy @gvanrossum, @larryhastings, @ericvsmith, @gvanrossum, @The-Compiler, @ilevkivskyi, @JelleZijlstra, @Fidget-Spinner, @AlexWaygood, @antonagestam

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

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GitHub fields:

assignee = None
closed_at = None
created_at = <Date 2021-03-10.14:38:41.071>
labels = ['type-bug', 'library', '3.9', '3.10']
title = 'typing.get_type_hints with TYPE_CHECKING imports / getting hints for single argument'
updated_at = <Date 2022-03-20.19:21:43.531>
user = 'https://github.com/The-Compiler'

bugs.python.org fields:

activity = <Date 2022-03-20.19:21:43.531>
actor = 'AlexWaygood'
assignee = 'none'
closed = False
closed_date = None
closer = None
components = ['Library (Lib)']
creation = <Date 2021-03-10.14:38:41.071>
creator = 'The Compiler'
dependencies = []
files = []
hgrepos = []
issue_num = 43463
keywords = []
message_count = 15.0
messages = ['388436', '388444', '388556', '388578', '388749', '388750', '388751', '388756', '391210', '391225', '391229', '391251', '391254', '391257', '415627']
nosy_count = 10.0
nosy_names = ['gvanrossum', 'larry', 'eric.smith', 'Guido.van.Rossum', 'The Compiler', 'levkivskyi', 'JelleZijlstra', 'kj', 'AlexWaygood', 'antonagestam']
pr_nums = []
priority = 'normal'
resolution = None
stage = None
status = 'open'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue43463'
versions = ['Python 3.9', 'Python 3.10']

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

Start with the typing.get_type_hints entry point and read the discussion for BPO issue 43463. Clarify the expected behavior for TYPE_CHECKING imports and hints for a single argument, then identify the relevant implementation and tests; done means the agreed behavior is covered without regressions.

Written by the indexing model from the issue text.

Assessment

Tech stack
python
Domain
developer-experience
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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