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GeezerVison is showing github.com — [3.13] Document `Py_AddPendingCall()` change with subinterpreters in 3.12 (GH-139117) by miss-islington · Pull Request #139119 · python/cpython

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@miss-islington

@miss-islington miss-islington commented Sep 18, 2025 •
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Prior to 3.9, Py_AddPendingCall() would always run pending calls in the main interpreter, but then each interpreter got their own ceval state, and they were scheduled for any interpreter. In GH-104813, this was undone, so Py_AddPendingCall() would always schedule for the main interpreter.
(cherry picked from commit 89ff88b)

Co-authored-by: Peter Bierma [email protected]


📚 Documentation preview 📚: https://cpython-previews--139119.org.readthedocs.build/

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@ZeroIntensity @miss-islington
Document Py_AddPendingCall() change with subinterpreters in 3.12 (p…
a1ca2f5
…ythonGH-139117)

Prior to 3.9, Py_AddPendingCall() would always run pending calls in the main interpreter, but then each interpreter got their own ceval state, and they were scheduled for any interpreter. In pythonGH-104813, this was undone, so Py_AddPendingCall() would always schedule for the main interpreter.
(cherry picked from commit 89ff88b)

Co-authored-by: Peter Bierma <[email protected]>
@bedevere-app bedevere-app Bot added awaiting review docs Documentation in the Doc dir skip news labels Sep 18, 2025
@github-project-automation github-project-automation Bot added this to Docs PRs Sep 18, 2025
@github-project-automation github-project-automation Bot moved this to Todo in Docs PRs Sep 18, 2025
@bedevere-app bedevere-app Bot added skip issue sprint labels Sep 18, 2025
@bedevere-app bedevere-app Bot mentioned this pull request Sep 18, 2025
Document Py_AddPendingCall() change with subinterpreters in 3.12 #139117
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@bedevere-app bedevere-app Bot added topic-C-API topic-subinterpreters labels Sep 18, 2025
@github-project-automation github-project-automation Bot added this to Sprint Sep 18, 2025
@github-project-automation github-project-automation Bot moved this to Todo in Sprint Sep 18, 2025
ZeroIntensity
ZeroIntensity approved these changes Sep 18, 2025
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@bedevere-app bedevere-app Bot removed the awaiting review label Sep 18, 2025
@github-project-automation github-project-automation Bot moved this from Todo to In Progress in Sprint Sep 18, 2025
@bedevere-app bedevere-app Bot added the awaiting merge label Sep 18, 2025
@ZeroIntensity
ZeroIntensity enabled auto-merge (squash) September 18, 2025 12:11
@ZeroIntensity
ZeroIntensity merged commit 24b6992 into python:3.13 Sep 18, 2025
@github-project-automation github-project-automation Bot moved this from In Progress to Done in Sprint Sep 18, 2025
@github-project-automation github-project-automation Bot moved this from Todo to Done in Docs PRs Sep 18, 2025
@bedevere-app bedevere-app Bot removed the awaiting merge label Sep 18, 2025
@miss-islington
miss-islington deleted the backport-89ff88b-3.13 branch January 2, 2026 17:39
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@miss-islington @ZeroIntensity
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