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Support locales with @-modifiers

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#137729 In python/cpython;

· serhiy-storchaka opened on Aug 13, 2025

Note change in behavior for itertools.tee() with "flattening" itertables

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

docsDocumentation in the Doc dirDocumentation in the Doc dir

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

Status: Open.

#137597 In python/cpython;

· treyhunner opened on Aug 9, 2025

Regression in ssl module between 3.13.5 and 3.13.6: reading from a TLS-encrypted connection blocks

3.13bugs and security fixesbugs and security fixes

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

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

release-blocker

topic-SSL

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

Status: Open.

#137583 In python/cpython;

· aaugustin opened on Aug 9, 2025

CPython-WASM interpreter (python.wasm) never exits the program when it is built on WASI-SDK 27

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

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

OS-wasi

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

Status: Open.

#137580 In python/cpython;

· fernwehist opened on Aug 9, 2025

Calling help() on a dataclass shows dataclass internal names instead of type names in 3.14 or later

3.14bugs and security fixesbugs and security fixes

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

deferred-blocker

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-dataclasses

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

Status: Open.

#137530 In python/cpython;

· DavidCEllis opened on Aug 7, 2025

test_sigwaitinfo fails on NetBSD due to POSIX violation

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

OS-netbsd

testsTests in the Lib/test dirTests in the Lib/test dir

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

Status: Open.

#137490 In python/cpython;

· furkanonder opened on Aug 6, 2025

<code>inspect.getsourcelines()</code> mishandles multi-line generator expressions

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

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

Status: Open.

#137477 In python/cpython;

· George-Ogden opened on Aug 6, 2025

Deadlock at shutdown with stop-the-world and daemon threads

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

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

topic-free-threading

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

Status: Open.

#137433 In python/cpython;

· colesbury opened on Aug 5, 2025

<code>sys._setprofileallthreads</code> race condition

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

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

topic-free-threading

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

Status: Open.

#137400 In python/cpython;

· colesbury opened on Aug 5, 2025

configure.ac is missing line continuation resulting in bad configure script

3.14bugs and security fixesbugs and security fixes

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

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

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

Status: Open.

#137390 In python/cpython;

· markmcclain opened on Aug 4, 2025

REPL incorrectly accepts errorneous <code>global</code> statement

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

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

stdlibPython modules in the Lib dirPython modules in the Lib dir

topic-replRelated to the interactive shellRelated to the interactive shell

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

Status: Open.

#137376 In python/cpython;

· matthewyu0311 opened on Aug 4, 2025

Docs for PyLong_AsInt32/64() don't mention support for __index__() method

3.14bugs and security fixesbugs and security fixes

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

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#137368 In python/cpython;

· skirpichev opened on Aug 4, 2025