astral-sh/uv

Filter Python executables on Windows by Python version metadata

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#13,927 opened on Jun 9, 2025

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 (2 comments) (0 reactions) (0 assignees)Rust (3,111 forks)batch import
help wantedperformancewindows

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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

Research direction
Examine Windows PE executable version resource to extract Python version metadata. Implement a filter in uv's Python discovery that checks the version info before launching the interpreter.
Tech stack
rust
Domain
clibackend
Issue type
Performance
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.
Half day
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
RustWindows development
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
65