uv-package-manager

UV Package Manager

Comprehensive guide to using uv, an extremely fast Python package installer and resolver written in Rust, for modern Python project management and dependency workflows.

Core Concepts

1. What is uv?

• Ultra-fast package installer: 10-100x faster than pip
• Written in Rust: Leverages Rust's performance
• Drop-in pip replacement: Compatible with pip workflows
• Virtual environment manager: Create and manage venvs
• Python installer: Download and manage Python versions
• Resolver: Advanced dependency resolution
• Lockfile support: Reproducible installations

2. Key Features

• Blazing fast installation speeds
• Disk space efficient with global cache
• Compatible with pip, pip-tools, poetry
• Comprehensive dependency resolution
• Cross-platform support (Linux, macOS, Windows)
• No Python required for installation
• Built-in virtual environment support

3. UV vs Traditional Tools

• vs pip: 10-100x faster, better resolver
• vs pip-tools: Faster, simpler, better UX
• vs poetry: Faster, less opinionated, lighter
• vs conda: Faster, Python-focused

Installation

Quick Install

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

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

# Using pip (if you already have Python)
pip install uv

# Using Homebrew (macOS)
brew install uv

# Using cargo (if you have Rust)
cargo install --git https://github.com/astral-sh/uv uv

Verify Installation

uv --version
# uv 0.x.x

Quick Start

Create a New Project

# Create new project with virtual environment
uv init my-project
cd my-project

# Or create in current directory
uv init .

# Initialize creates:
# - .python-version (Python version)
# - pyproject.toml (project config)
# - README.md
# - .gitignore

Install Dependencies

# Install packages (creates venv if needed)
uv add requests pandas

# Install dev dependencies
uv add --dev pytest black ruff

# Install from requirements.txt
uv pip install -r requirements.txt

# Install from pyproject.toml
uv sync