uv — ultra-fast Python package manager

💬 "uv command"

uv is a ultra-fast Python package manager, a Python package management and execution tool built with Rust. It is dozens of times faster than pip.

As it is built on Rust, it provides 10~100x faster installation compared to pip. It includes built-in virtual environment creation and management (virtualenv is not required).

• Concept: Being built on Rust, it offers installation 10~100x faster than pip.
• Key Features: Includes built-in virtual environment creation and management (virtualenv is not required).
• Advantages: Pins dependencies with pyproject.toml and uv.lock.
• Usage: Also downloads and manages Python itself (replacing pyenv).

Installation and Download

uv is installed via a package manager or an official script.

You can verify the installation with uv --version.

Common Options

Essential Command Combination 3

• uv init myapp && cd myapp — Initialize a new project
• uv add fastapi uvicorn — Add dependencies
• uv run python main.py — Execute in the virtual environment

💬 "Show me an example of using uv on a real server."

Here are common situations encountered on production servers, presented in order.

Step 1 · Verify Installation

Check if it is installed.

uv --version || curl -LsSf https://astral.sh/uv/install.sh | sh

Step 2 · Create Virtual Environment

Create the project's virtual environment.

cd /var/www/app && uv venv

Step 3 · Install Dependencies

Install the existing requirements.txt.

uv pip install -r requirements.txt

Actual Execution Screen

This shows the result of creating a virtual environment and installing dependencies using uv.

!uv command execution result

A production server

How It's Used in Practice

1. Migrating an Existing pip Project

Scenario — Migrating an existing requirements.txt to uv.

uv venv && uv pip install -r requirements.txt

Result — 24 packages are installed in 120ms.

Key Point — Build time is reduced from tens of seconds to tens of milliseconds.

2. Ensuring Reproducibility in CI

Scenario — Introducing uv into the CI pipeline.

uv add fastapi && uv run pytest

Result — Reproducible installation is possible with uv.lock.

Key Point — The uv.lock file must always be committed to git.

Actual Execution Screen

This shows the result of running an application with uv run.

!uv command execution result 2

A production server

Points to Note

• The uv.lock file must always be committed to git. Without it, reproducibility is lost.
• To avoid conflicts with globally installed packages from pip, use it only inside a virtual environment.
• In corporate firewall environments, setting a PyPI mirror (--index-url) may be necessary.

Source (HTML): https://games.aidebatehub.com/programs/linux/modern/uv.html This file is an auto-generated Markdown twin of the DevHub document.