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Optimize reference tracking and eliminate branching during returns and yields

3.15new features, bugs and security fixesnew features, bugs and security fixes

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-JIT

Status: Open.

#144540�?In python/cpython;

· markshannon opened on Feb 6, 2026

Update bundled pip to 26.0.1

dependenciesPull requests that update a dependency filePull requests that update a dependency file

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-ensurepip

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144538�?In python/cpython;

· darklight3it opened on Feb 6, 2026

Use <code>pybuilddir.txt</code> to find <code>_sysconfigdata</code> for the WASI build script

3.15new features, bugs and security fixesnew features, bugs and security fixes

buildThe build process and cross-buildThe build process and cross-build

easy

Status: Open.

#144533�?In python/cpython;

· brettcannon opened on Feb 6, 2026

is_file no longer throws an exception on Python 3.14

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is provided

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-pathlib

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#144525�?In python/cpython;

· intentionally-left-nil opened on Feb 5, 2026

Improve critical sections and stop-the-world interoperability

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144513�?In python/cpython;

· colesbury opened on Feb 5, 2026

<code>call_soon_threadsafe</code> callbacks from executor no longer run before <code>await run_in_executor()</code> returns in 3.14.3

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-asyncio

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#144506�?In python/cpython;

· sairon opened on Feb 5, 2026

<code>multiprocessing.Pool</code> starts to fail if command has a long list of arguments

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-multiprocessing

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#144503�?In python/cpython;

· sjoerdjob opened on Feb 5, 2026

www.python.org/downloads/windows incomplete about 3.13.12

docsDocumentation in the Doc dirDocumentation in the Doc dir

OS-windows

pendingThe issue will be closed if no feedback is providedThe issue will be closed if no feedback is provided

Status: Open.

#144496�?In python/cpython;

· alex77g2 opened on Feb 5, 2026

compute_changes.py over-selects when a GHA workflow file is edited

infraCI, GitHub Actions, buildbots, Dependabot, etc.CI, GitHub Actions, buildbots, Dependabot, etc.

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#144492�?In python/cpython;

· brettcannon opened on Feb 4, 2026

Enhancement request: make pycore_cell.h compile cleanly under C++

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144490�?In python/cpython;

· yoney opened on Feb 4, 2026

heap-buffer-overflow in functools.partial.__repr__()

extension-modulesC modules in the Modules dirC modules in the Modules dir

type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

Status: Open.

#144475�?In python/cpython;

· Qanux opened on Feb 4, 2026

Docs: Clarify/unify “stealing” docs

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-C-API

Status: Open.

#144473�?In python/cpython;

· encukou opened on Feb 4, 2026