Search results

Quadratic time in xml.etree.ElementTree when parsing text with a large number of comments

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

topic-XML

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

Status: Open.

#150096 In python/cpython;

· StanFromIreland opened on May 19, 2026

tarfile: zstopen uses except Exception: and leaks fileobj on BaseException, inconsistent with gzopen/bz2open/xzopen

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.

#150077 In python/cpython;

· lpyu001 opened on May 19, 2026

Clarify warnings.deprecated public API

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#150076 In python/cpython;

· flying-sheep opened on May 19, 2026

tarfile: addfile() doesn't set member offsets

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.

#150075 In python/cpython;

· spbnick opened on May 19, 2026

Lazily import traceback in logging

performancePerformance or resource usagePerformance or resource usage

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

topic-lazy-imports

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150072 In python/cpython;

· ByteFlowing1337 opened on May 19, 2026

Frozen dataclass and property: improve test coverage

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

topic-dataclasses

Status: Open.

#150069 In python/cpython;

· sobolevn opened on May 19, 2026

Lazy imports may leave phantom unresolvable attributes in module

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

topic-lazy-imports

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

Status: Open.

#150052 In python/cpython;

· DinoV opened on May 19, 2026

test_add_python_opts fails when executed with PYTHONDEVMODE=1 in the environment

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.

#150046 In python/cpython;

· pradyunsg opened on May 19, 2026

Add support for frozendict as AST Constant

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.

#150045 In python/cpython;

· lgeiger opened on May 19, 2026

Py_(X)SETREF should be atomic on free-threaded builds

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

topic-C-API

topic-free-threading

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#150044 In python/cpython;

· MojoVampire opened on May 19, 2026

Fix rare and unimportant refleak in queue.SimpleQueue.put

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.

#150042 In python/cpython;

· larryhastings opened on May 18, 2026

Tachyon --jsonl output does not print filename on completion

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.

#150034 In python/cpython;

· lkollar opened on May 18, 2026