uv

What it is

uv is a Python package installer and project manager written in Rust by Astral. It does the jobs of pip, virtualenv, pipx and pip-tools with one command, much faster: it creates environments, resolves and locks dependencies, installs Python versions and runs tools.

Why it’s here

• Fast. Installs and dependency resolution take a fraction of the time pip needs.
• Projects made simple. uv init, uv add and uv run manage a project’s environment and lock file for you.
• Run tools without installing them. uvx ruff check runs a tool in a throwaway environment.

On CoreDesktop

uv is installed from pacman. CoreDesktop also needs it for upgrades: pipx apps installed with pipx’s uv backend, as Hermes Agent installs them, need uv to upgrade. update keeps uv current with the rest of the pacman packages.

uv run script.py