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Scalar replacement of BINARY_SLICE

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144569 In python/cpython;

· Fidget-Spinner opened on Feb 7, 2026

tachyon fails to attach with polars imported

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-profiling

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

Status: Open.

#144563 In python/cpython;

· mstarodub opened on Feb 7, 2026

Implement <code>_from_iterable</code> on <code>builtins.set</code> and<code>builtins.frozenset</code>

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

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

topic-typing

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144557 In python/cpython;

· randolf-scholz opened on Feb 7, 2026

Refactor tail-call.yml

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

type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

Status: Open.

#144552 In python/cpython;

· savannahostrowski opened on Feb 6, 2026

Update OpenSSL (January 2026)

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

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

OS-android

OS-mac

OS-windows

topic-SSL

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144551 In python/cpython;

· hugovk opened on Feb 6, 2026

Argument Clinic: the Py_buffer converter only accepts None as the default value

topic-argument-clinic

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144545 In python/cpython;

· serhiy-storchaka opened on Feb 6, 2026

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

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

<code>pathlib.Path.is_file</code> 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

<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