astral-sh/uv

Filter Python executables on Windows by Python version metadata

Open

#13927 opened on Jun 9, 2025

View on GitHub
 (2 comments) (0 reactions) (0 assignees)Rust (84,934 stars) (3,111 forks)batch import
help wantedperformancewindows

Description

See https://github.com/astral-sh/ruff/pull/18550#issuecomment-2956350021

Windows Python executables seem to have the Python version embedded in their metadata. This may be faster than querying the Python interpreter to get its version, which would speed up Python discovery on Windows when a specific version is requested.

Contributor guide

Tech stack
rustpython
Domain
cliperformancedeveloper experience
Issue type
feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-2 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
mostly clear
Prerequisites
Rust programmingWindows PE metadata
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
30
Research direction
Investigate the metadata embedded in Windows Python executables, referenced in the linked PR comment. Study uv's current Python discovery logic in the codebase. Determine if the version metadata is stored in PE headers or version resources, then implement filtering by version to avoid querying each interpreter.