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GeezerVison is showing github.com — gh-149985: Remove future annotations and if TYPE_CHECKING in pyrepl by JelleZijlstra · Pull Request #149992 · python/cpython

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@JelleZijlstra

@JelleZijlstra JelleZijlstra commented May 18, 2026 •
edited by bedevere-app Bot
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from __future__ import annotations is soft-deprecated now that evaluation
of annotations is always deferred. if TYPE_CHECKING can often be replaced
with lazy imports.

A risk is that creation of dataclasses will be slower without from __future__ import annotations, because the dataclass machinery will force evaluation of annotations. However, if the annotations are simple my simple benchmarks do not show an appreciable slowdown.

  • Issue: Modernize annotation usage in pyrepl #149985

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@JelleZijlstra
pythongh-149985: Remove future annotations and if TYPE_CHECKING in py…
03be6c8 
…repl

`from __future__ import annotations` is soft-deprecated now that evaluation
of annotations is always deferred. `if TYPE_CHECKING` can often be replaced
with lazy imports.
@JelleZijlstra JelleZijlstra added the skip news label May 18, 2026
@bedevere-app bedevere-app Bot mentioned this pull request May 18, 2026
Modernize annotation usage in pyrepl #149985
Closed
@JelleZijlstra
.
0e8b022
@JelleZijlstra
JelleZijlstra marked this pull request as ready for review May 18, 2026 14:11
@JelleZijlstra
JelleZijlstra requested review from ambv, lysnikolaou and pablogsal as code owners May 18, 2026 14:11
@bedevere-app bedevere-app Bot added the awaiting core review label May 18, 2026
@JelleZijlstra JelleZijlstra mentioned this pull request Jun 6, 2026
Type annotations in _colorize module are unresolvable at runtime #150994
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github-actions Bot commented Aug 19, 2026

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This PR is stale because it has been open for 90 days with no activity.
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@github-actions github-actions Bot added the stale Stale PR or inactive for long period of time. label Aug 19, 2026
@JelleZijlstra
Merge branch 'main' into nofuture
b65df69
@github-actions github-actions Bot removed the stale Stale PR or inactive for long period of time. label Aug 25, 2026
JelleZijlstra added 3 commits August 25, 2026 06:12
@JelleZijlstra
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JelleZijlstra merged commit e2118b0 into python:main Aug 25, 2026
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@bedevere-app bedevere-app Bot removed the awaiting core review label Aug 25, 2026
@ashm-dev ashm-dev mentioned this pull request Aug 26, 2026
Modernize annotation usage in libregrtest #156402
Closed
clin1234 pushed a commit to clin1234/cpython that referenced this pull request Aug 27, 2026
@JelleZijlstra @clin1234
pythongh-149985: Remove future annotations and if TYPE_CHECKING in py…
aba1494 
…repl (python#149992)

`from __future__ import annotations` is soft-deprecated now that evaluation
of annotations is always deferred. `if TYPE_CHECKING` can often be replaced
with lazy imports.
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@pablogsal pablogsal Awaiting requested review from pablogsal pablogsal is a code owner
@lysnikolaou lysnikolaou Awaiting requested review from lysnikolaou lysnikolaou is a code owner
@ambv ambv Awaiting requested review from ambv ambv is a code owner

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@JelleZijlstra
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