is an extremely fast Python package and project manager
written in Rust
it was created by Astral (the same team behind ruff)
replaces several separate tools—like pip, pip-tools, venv, poetry, and pyenv—with a single, unified, and significantly faster executable

Replaces

Replaces pip: For installing packages
Replaces venv: For managing virtual environments
Replaces pyenv: For installing different versions of Python (3.10, 3.12, etc.)
Replaces pip-tools: For creating “lockfiles” (uv.lock) to ensure everyone on a team uses the exact same versions

Example Use Cases

Command	What it does
`uv python install 3.12`	Downloads and installs Python 3.12 automatically
`uv venv`	Creates a virtual environment in a blink of an eye
`uv pip install <package>`	The high-speed drop-in replacement for standard `pip install`
`uv run script.py`	Runs a script, automatically handling the environment setup
`uv sync`	Synchronizes your environment with your `pyproject.toml` and `uv.lock`