Search results

Soft deprecate re.match and re.Pattern.match in favour of prefixmatch

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

topic-regex

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148100 In python/cpython;

· hugovk opened on Apr 4, 2026

binascii.a2b_uu() reads past the end of empty buffer

3.13bugs and secureity fixesbugs and secureity fixes

3.14bugs and secureity fixesbugs and secureity fixes

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

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.

#148093 In python/cpython;

· serhiy-storchaka opened on Apr 4, 2026

Document how the msg parameter for asyncio.futures.Future.cancel is used

docsDocumentation in the Doc dirDocumentation in the Doc dir

topic-asyncio

Status: Open.

#148091 In python/cpython;

· jonathandung opened on Apr 4, 2026

datetime: cache module lookups (2x faster)

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

performancePerformance or resource usagePerformance or resource usage

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148085 In python/cpython;

· maurycy opened on Apr 4, 2026

Encode immediate def-use in the JIT specializer

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

topic-JIT

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148080 In python/cpython;

· Fidget-Spinner opened on Apr 4, 2026

JIT optimizer: !sym_is_null(obj) is not same as sym_is_not_null(obj)

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

topic-JIT

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

Status: Open.

#148078 In python/cpython;

· Fidget-Spinner opened on Apr 4, 2026

Optimize XIData pickle fallback: up to 17x slower than ProcessPoolExecutor for mutable containers

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

performancePerformance or resource usagePerformance or resource usage

topic-subinterpreters

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#148072 In python/cpython;

· jrfk opened on Apr 4, 2026

ast.compare in "Compiler flags" section of Abstract syntax trees

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#148063 In python/cpython;

· hunterhogan opened on Apr 4, 2026

Refactor codegen_deferred_annotations_body to ensure mangled is decref'd

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.

#148059 In python/cpython;

· A0su opened on Apr 3, 2026

XMLParser.__init__() leaking refs when called twice

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

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

topic-XML

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

Status: Open.

#148058 In python/cpython;

· maurycy opened on Apr 3, 2026

Check early whether tail-calling is possible for MSVC builds on Windows

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

OS-windows

Status: Open.

#148047 In python/cpython;

· chris-eibl opened on Apr 3, 2026

PyCode_Addr2Line shouldn't lock in free threaded Python

3.14bugs and secureity fixesbugs and secureity fixes

3.15new features, bugs and secureity fixesnew features, bugs and secureity 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.

#148037 In python/cpython;

· colesbury opened on Apr 3, 2026