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random module binomialvariate function returns wrong results

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.

#149221 In python/cpython;

· lighting9999 opened on May 1, 2026

Add frozendict test in Lib/test/test_crossinterp.py

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

topic-subinterpreters

Status: Open.

#149219 In python/cpython;

· sobolevn opened on May 1, 2026

Avoid adding dependencies on immutable, immortal classes in the JIT

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

performancePerformance or resource usagePerformance or resource usage

topic-JIT

Status: Open.

#149217 In python/cpython;

· markshannon opened on May 1, 2026

PyType_Watch does not report deallocations

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

Status: Open.

#149216 In python/cpython;

· markshannon opened on May 1, 2026

_remote_debugging: non-ASCII both filenames and function names garbled

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

Status: Open.

#149214 In python/cpython;

· maurycy opened on May 1, 2026

unpack_sequence benchmark runs slower under JIT

performancePerformance or resource usagePerformance or resource usage

topic-JIT

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

Status: Open.

#149212 In python/cpython;

· eendebakpt opened on May 1, 2026

Default warnings.showwarning always used when interpreter session is cleaning up

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

Status: Open.

#149211 In python/cpython;

· lethalbit opened on May 1, 2026

Metaclasses with type annotated attributes do not add __annotations__ = {} to derived classes.

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

Status: Open.

#149208 In python/cpython;

· matthewwardrop opened on May 1, 2026

JIT: add _RROT_3 uop to reduce stack moves

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#149204 In python/cpython;

· NekoAsakura opened on Apr 30, 2026

Implement PEP 831 – Frame Pointers Everywhere: Enabling System-Level Observability for Python

Status: Open.

#149202 In python/cpython;

· pablogsal opened on Apr 30, 2026

_PyExecutorObject is exposed to the abidiff tool due to indirect use in PyCodeObject

topic-C-API

topic-JIT

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

Status: Open.

#149196 In python/cpython;

· Fidget-Spinner opened on Apr 30, 2026

Modern defaults for pprint

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.

#149189 In python/cpython;

· hugovk opened on Apr 30, 2026