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importlib.resources.abc.ResourceReader docs/implementation discrepancies

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-importlib

Status: Open.

#143513 In python/cpython;

· moreati opened on Jan 7, 2026

PermissionError when attaching to a remote process despite elevated privileges

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

Status: Open.

#143511 In python/cpython;

· RafaelWO opened on Jan 7, 2026

test_urllib2net fails in Python-3.13.11

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.

#143507 In python/cpython;

· zuhu2195 opened on Jan 7, 2026

expose CELL status of a symbol in symtable

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.

#143504 In python/cpython;

· iritkatriel opened on Jan 6, 2026

Change default security of <code>ftplib.FTP_TLS</code>

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

type-securityA security issueA security issue

Status: Open.

#143497 In python/cpython;

· hartwork opened on Jan 6, 2026

Behavior of generator expressions doesn't match the docs when passed a non-iterable

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)

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

Status: Open.

#143493 In python/cpython;

· markshannon opened on Jan 6, 2026

Optimize copy.deepcopy by converting a generator expression into list comprehension - 1.04x improvement in pyperformance

performancePerformance or resource usagePerformance or resource usage

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.

#143445 In python/cpython;

· heikkitoivonen opened on Jan 5, 2026

<code>test_ssl_in_multiple_threads</code> is flaky due to <code>with self.subTest</code> with threads

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

topic-SSL

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

Status: Open.

#143443 In python/cpython;

· colesbury opened on Jan 5, 2026

<code>test_profiling</code> sometimes times out under TSan

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

topic-profiling

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

Status: Open.

#143442 In python/cpython;

· colesbury opened on Jan 5, 2026

test_half_float in test_struct fails on mips

OS-unsupported

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.

#143429 In python/cpython;

· chenx97 opened on Jan 5, 2026

<code>Path.write_text</code> does not check whether LF is preceded by CR before converting it to CRLF on windows, resulting in CRCRLF

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

topic-IO

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143428 In python/cpython;

· DetachHead opened on Jan 5, 2026

Suggested change to dnd.py to better work with multiple top level windows.

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-tkinter

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143425 In python/cpython;

· f34rdotcom opened on Jan 5, 2026