Ruff - The Fast Python Linter

[](https://github.com/charliermarsh/ruff)

[](https://pypi.python.org/pypi/ruff)

[](https://pypi.python.org/pypi/ruff)

[](https://pypi.python.org/pypi/ruff)

[](https://github.com/charliermarsh/ruff/actions)

[**Discord**](https://discord.gg/c9MhzV8aU5) | [**Docs**](https://docs.astral.sh/ruff/) | [**Playground**](https://play.ruff.rs/)

An extremely fast Python linter, written in Rust.


Linting the CPython codebase from scratch.

- ⚡️ 10-100x faster than existing linters

- 🐍 Installable via `pip`

- 🛠️ `pyproject.toml` support

- 🤝 Python 3.12 compatibility

- ⚖️ Drop-in parity with Flake8, isort, and Black

- 📦 Built-in caching, to avoid re-analyzing unchanged files

- 🔧 Autofix support, for automatic error correction (e.g., automatically remove unused imports)

- 📏 Over [700 built-in rules](https://docs.astral.sh/ruff/rules/), with native re-implementations of popular Flake8 plugins, like flake8-bugbear

- ⚖️ [Near-parity](https://beta.ruff.rs/docs/faq/#how-does-ruff-compare-to-flake8) with the built-in Flake8 rule set

- ⌨️ First-party [editor integrations](https://docs.astral.sh/ruff/integrations/) for [VS Code](https://github.com/astral-sh/ruff-vscode) and [more](https://github.com/astral-sh/ruff-lsp)

- 🌎 Monorepo-friendly, with [hierarchical and cascading configuration](https://docs.astral.sh/ruff/configuration/#pyprojecttoml-discovery)