uv is a blazing fast, all-in-one Python package and project manager built in Rust by the creators of Ruff.

It aims to replace tools like:

• pip, pip-tools, pipx, virtualenv
• poetry, pyenv, and twine

• 10–100x faster than pip
• One tool for everything: deps, envs, Python versions, tools
• Manages Python versions
• Uses global cache for space-efficient installs
• Compatible with pip CLI

# macOS/Linux
curl -LsSf https://astral.sh/uv/install.sh | sh

# Windows (PowerShell)
powershell -ExecutionPolicy ByPass -c "irm https://astral.sh/uv/install.ps1 | iex"

pip install uv
# or
pipx install uv

To update:

uv self update

uv init myproject
cd myproject
uv add requests
uv run script.py

• Initializes a pyproject.toml
• Creates .venv
• Adds dependencies and runs your code

cd existing-project
uv venv                    # create/manage virtualenv
uv sync                    # install from lockfile
uv run app.py              # run code inside env
# Optional: uv compile     # compile deps into lockfile

• Works even if you're not using uv for setup
• Compatible with requirements.txt and pyproject.toml

Based on SaaS Pegasus Deep Dive

# Project setup
uv init myproject            # Init new project
uv venv                      # Create/manage virtualenv
uv python install 3.11       # Install specific Python version
uv python pin 3.11           # Use specific Python version

# Dependency management
uv add requests              # Add dependency
uv remove requests           # Remove dependency
uv compile                   # Create uv.lock
uv sync                      # Install from lockfile
uv pip install -r req.txt    # Use pip commands
uv pip sync file.txt         # Install from requirements.txt

# Run scripts
uv run script.py             # Run Python file
uv run "command"             # Run shell command in venv

# Tools
uv tool install ruff         # Install CLI tool like pipx
uvx pycowsay "hello world"   # Run tool temporarily

# Scripts with inline metadata
uv add --script script.py requests  # Inject deps into script
uv run script.py                    # Run it in isolated env

# Cache and maintenance
uv cache clean               # Clear cache
uv self update               # Update uv itself

• Extremely fast (Rust-powered)
• Drop-in pip & pipx replacement
• All-in-one (env, deps, tools, Python)
• Global cache saves space
• Universal lockfile
• Great for mono-repos (Cargo-style workspaces)

• Still new—less mature than pip/poetry
• Not all advanced features from poetry yet
• Smaller ecosystem

uv is not just fast—it's a serious contender to unify the Python tooling ecosystem. Whether you're a beginner or managing large workspaces, it's worth trying today.