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GeezerVison is showing github.com — [3.15] gh-142349: Simplify lazy import resolution (GH-158282) by pablogsal · Pull Request #158569 · python/cpython

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@pablogsal

@pablogsal pablogsal commented Oct 1, 2026 •
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Backport #158282 (a6a63b6) to 3.15 so lazy import fixes use the same resolution code as main. The 3.15 conflicts are resolved, the interpreter files are regenerated, and the ABI snapshot is updated for the removed private helpers and the changed return type of _PyDict_LoadGlobalStackRef.

The debug build passes test_lazy_import, test_import, test_importlib, test_module, test_dict, test_capi, and test_sys (3,268 tests).

  • Issue: Implement PEP 810 – Explicit lazy imports #142349

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@pablogsal @encukou @hugovk
[3.15] pythongh-142349: Simplify lazy import resolution (pythonGH-158282
c9ca51c 
)

Backport the shared lazy import resolver to Python 3.15, regenerate
interpreter files, and update the ABI snapshot.

Co-authored-by: Petr Viktorin <[email protected]>
Co-authored-by: Hugo van Kemenade <[email protected]>
@pablogsal pablogsal added skip news release-blocker labels Oct 1, 2026
@github-project-automation github-project-automation Bot added this to Release and Deferred blockers 🚫 Oct 1, 2026
@github-project-automation github-project-automation Bot moved this to Todo in Release and Deferred blockers 🚫 Oct 1, 2026
@bedevere-app bedevere-app Bot added the type-feature A feature request or enhancement label Oct 1, 2026
This was referenced Oct 1, 2026
Implement PEP 810 – Explicit lazy imports #142349
Closed
gh-142349: Simplify lazy import resolution #158282
Merged
@pablogsal pablogsal closed this Oct 1, 2026
@pablogsal pablogsal reopened this Oct 1, 2026
@pablogsal
pablogsal marked this pull request as ready for review October 1, 2026 16:25
@pablogsal
pablogsal requested review from DinoV, FFY00, Yhg1s, ZeroIntensity, brettcannon, encukou, ericsnowcurrently, kumaraditya303, markshannon, methane, ncoghlan and warsaw as code owners October 1, 2026 16:25
@bedevere-app bedevere-app Bot added the awaiting core review label Oct 1, 2026
@pablogsal
pablogsal requested a review from hugovk October 1, 2026 16:26
@pablogsal
pablogsal enabled auto-merge (squash) October 1, 2026 16:26
@read-the-docs-community

read-the-docs-community Bot commented Oct 1, 2026

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Documentation build overview

📚 cpython-previews | 🛠️ Build #34881339 | 📁 Comparing c9ca51c against main (82fcaf8)

  🔍 Preview build  

148 files changed · + 1 added · ± 142 modified · - 5 deleted

+ Added

  • library/asyncio-policy.html

± Modified

  • glossary.html
  • index.html
  • license.html
  • py-modindex.html
  • builtins/exceptions.html
  • builtins/functions.html
  • builtins/stdtypes.html
  • c-api/bytes.html
  • c-api/capsule.html
  • c-api/complex.html
  • and 132 more...

- Deleted

  • deprecations/pending-removal-in-3.21.html
  • library/tkinter.dialogs.html
  • library/tkinter.fontchooser.html
  • library/tkinter.systray.html
  • whatsnew/3.16.html
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hugovk
hugovk approved these changes Oct 1, 2026
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@bedevere-app bedevere-app Bot added awaiting merge and removed awaiting core review labels Oct 1, 2026
@pablogsal
pablogsal merged commit 021f634 into python:3.15 Oct 1, 2026
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@pablogsal
pablogsal deleted the backport-158282-3.15-land-20261001 branch October 1, 2026 16:56
@bedevere-app bedevere-app Bot removed the awaiting merge label Oct 1, 2026
@ddorian ddorian mentioned this pull request Oct 2, 2026
3.15: gh-142349 backport moves c_stack_refs in _PyThreadStateImpl, breaking greenlet's rc2-built wheels #158593
Closed
@Yhg1s Yhg1s mentioned this pull request Oct 2, 2026
[3.15] GH-158593: Fix ABI compatibility with earlier RCs #158595
Merged
Kronuz added a commit to Kronuz/cpython that referenced this pull request Oct 5, 2026
@Kronuz
[3.15] pythongh-142349: Simplify lazy import resolution (pythonGH-158282
cc8f28a 
) (python#158569)
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@hugovk hugovk hugovk approved these changes
@ericsnowcurrently ericsnowcurrently Awaiting requested review from ericsnowcurrently ericsnowcurrently is a code owner
@ZeroIntensity ZeroIntensity Awaiting requested review from ZeroIntensity ZeroIntensity is a code owner
@FFY00 FFY00 Awaiting requested review from FFY00 FFY00 is a code owner
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@DinoV DinoV Awaiting requested review from DinoV DinoV is a code owner
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@pablogsal @hugovk
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