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GeezerVison is showing github.com — gh-144190: Clarify get_type_hints() instance behavior in docs by iamrajhans · Pull Request #144831 · python/cpython

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@iamrajhans

@iamrajhans iamrajhans commented Feb 15, 2026 •
edited by github-actions Bot
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Summary

Document typing.get_type_hints() behavior for instance objects in Python 3.14+.

  • Clarify that get_type_hints() is intended for modules, classes, and callables.
  • Add an explicit note that calling get_type_hints() on instances is not supported.
  • Recommend get_type_hints(type(obj)) for instance use cases.
  • Add a versionchanged:: 3.14 note explaining that instance support in earlier versions was undocumented behavior.

Why

Issue #144190 reported a regression when calling get_type_hints(self) in a dataclass __init__.
Core-dev discussion confirmed this is intentional in 3.14 and should be documented.

Testing

Docs-only change; no runtime behavior changed.

  • Issue: get_type_hints fails for dataclass in 3.14 #144190

📚 Documentation preview 📚: https://cpython-previews--144831.org.readthedocs.build/

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@iamrajhans
pythongh-144190: Clarify get_type_hints() instance behavior in docs
1636cce
@iamrajhans
iamrajhans requested review from AlexWaygood and JelleZijlstra as code owners February 15, 2026 09:05
@bedevere-app bedevere-app Bot added awaiting review docs Documentation in the Doc dir skip news labels Feb 15, 2026
@bedevere-app bedevere-app Bot mentioned this pull request Feb 15, 2026
get_type_hints fails for dataclass in 3.14 #144190
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@github-project-automation github-project-automation Bot added this to Docs PRs Feb 15, 2026
@github-project-automation github-project-automation Bot moved this to Todo in Docs PRs Feb 15, 2026
JelleZijlstra
JelleZijlstra approved these changes Feb 15, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting review labels Feb 15, 2026
@JelleZijlstra JelleZijlstra added the needs backport to 3.14 bugs and security fixes label Feb 15, 2026
@hugovk
hugovk merged commit e234662 into python:main Feb 26, 2026
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@github-project-automation github-project-automation Bot moved this from Todo to Done in Docs PRs Feb 26, 2026
@miss-islington-app

miss-islington-app Bot commented Feb 26, 2026

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Thanks @iamrajhans for the PR, and @hugovk for merging it 🌮🎉.. I'm working now to backport this PR to: 3.14.
🐍🍒⛏🤖
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@bedevere-app bedevere-app Bot removed the awaiting merge label Feb 26, 2026
miss-islington pushed a commit to miss-islington/cpython that referenced this pull request Feb 26, 2026
@iamrajhans @miss-islington
pythongh-144190: Clarify get_type_hints() instance behavior in docs (p…
f0a0e33 
…ythonGH-144831)

(cherry picked from commit e234662)

Co-authored-by: Rajhans Jadhao <[email protected]>
@bedevere-app

bedevere-app Bot commented Feb 26, 2026

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GH-145258 is a backport of this pull request to the 3.14 branch.
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@bedevere-app bedevere-app Bot removed the needs backport to 3.14 bugs and security fixes label Feb 26, 2026
hugovk pushed a commit that referenced this pull request Feb 26, 2026
@miss-islington @iamrajhans
[3.14] gh-144190: Clarify get_type_hints() instance behavior in docs (G…
856fdc6 
…H-144831) (#145258)

Co-authored-by: Rajhans Jadhao <[email protected]>
brijkapadia pushed a commit to brijkapadia/cpython that referenced this pull request Feb 28, 2026
@iamrajhans @brijkapadia
pythongh-144190: Clarify get_type_hints() instance behavior in docs (p…
9577f19 
…ython#144831)
ljfp pushed a commit to ljfp/cpython that referenced this pull request Apr 25, 2026
@iamrajhans @ljfp
pythongh-144190: Clarify get_type_hints() instance behavior in docs (p…
70e16e4 
…ython#144831)
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@JelleZijlstra JelleZijlstra JelleZijlstra approved these changes
@AlexWaygood AlexWaygood Awaiting requested review from AlexWaygood AlexWaygood is a code owner

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3 participants

@iamrajhans @JelleZijlstra @hugovk
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