Search results

Dataclasses trigger <code>__get__</code> on unused <code>ClassVar</code> values

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-dataclasses

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

Status: Open.

#144618 In python/cpython;

· johnslavik opened on Feb 9, 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

Idle Setting window auto resizes when selecting all text in ttk.Entry

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

topic-IDLE

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

Status: Open.

#144466 In python/cpython;

· kurawlefaraaz opened on Feb 4, 2026

Behavioral differences between the with-statement and <code>ExitStack.enter_context</code>

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

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

Status: Open.

#144386 In python/cpython;

· gottadiveintopython opened on Feb 2, 2026

<code>_colorize</code> module is slow to import, affecting <code>traceback</code> and <code>logging</code> modules

3.14bugs and security fixesbugs and security fixes

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

performancePerformance or resource usagePerformance or resource usage

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

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

Status: Open.

#144384 In python/cpython;

· danielhollas opened on Feb 2, 2026

[security] Disallow usage of control characters in status, headers and values for security in Lib/wsgiref/handlers.py

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

type-securityA security issueA security issue

Status: Open.

#144370 In python/cpython;

· benediktjohannes opened on Jan 31, 2026

PEP696 + PEP749: Defer evaluation of defaults when parametrizing

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

topic-typing

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

Status: Open.

#144361 In python/cpython;

· randolf-scholz opened on Jan 31, 2026

Tachyon sample dump/replay crashes

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

topic-profiling

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

Status: Open.

#144336 In python/cpython;

· hauntsaninja opened on Jan 30, 2026

Unexpected result with <code>NamedTuple(name, zip(keys, values))</code>

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

topic-typing

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

Status: Open.

#144321 In python/cpython;

· randolf-scholz opened on Jan 29, 2026

Suggestions: check for name collisions between modules and items in a module

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#144285 In python/cpython;

· ngoldbaum opened on Jan 27, 2026