What problem does it solve?
UV solves fragmented, slow, and brittle Python tooling workflows by providing a single high-performance tool to manage packages, virtual environments, CLI tools, and MCP server execution, reducing setup time and dependency conflicts.
Core Features & Use Cases
- Fast package management: parallel downloads, global cache, and deduplication for much faster installs than pip.
- Tool vs ephemeral execution: clear patterns for
uv tool install (persistent dev tools) and uvx (temporary executions and MCP servers).
- Python version & venv management: install, pin, and use multiple Python versions and create virtual environments seamlessly.
- Migrations & IDE integration: guidance for migrating from pip/pipx/poetry and configuring MCP servers in editors and CI.
- Troubleshooting & best practices: version-awareness, cache/permission fixes, and recommended workflows for production vs local dev.
Quick Start
Create a project virtual environment, add dependencies with uv add <package-name>, synchronize with uv sync, and run your code with uv run python main.py.