Ruff is a high-performance Python linter and code formatter written in Rust. It consolidates functionality traditionally provided by several separate Python development tools into a single application, reducing the complexity of configuring and maintaining code quality workflows.
The linter examines source code for potential defects, problematic programming practices and violations of coding conventions. Ruff also includes a formatter designed to offer a consistent alternative to Black.
The application is particularly attractive for large projects, where conventional analysis tools can introduce delays into editing and continuous integration workflows. Although Ruff replaces many common linting utilities, its rules and formatting behaviour are not identical to every tool it draws inspiration from.
This is free and open source software.
Key Features
- Implements more than 900 linting rules, including checks inspired by Pyflakes, pycodestyle, isort, pyupgrade and numerous Flake8 plugins.
- Automatically corrects many detected problems, including unused imports, unnecessary expressions and outdated programming patterns.
- Provides a Python code formatter with configurable line length and other formatting settings.
- Includes import sorting without requiring a separate isort installation.
- Uses built-in caching to avoid repeating analysis of unchanged source files.
- Supports hierarchical and cascading configuration through pyproject.toml and dedicated Ruff configuration files.
- Allows individual rules to be selected, ignored or overridden for particular files and directories.
- Provides a language server for editor diagnostics, fixes and formatting.
- Can check Jupyter notebooks and Python code embedded in supported project files.
Website: github.com/astral-sh/ruff
Support:
Developer: Charles Marsh
License: MIT License
Ruff is written in Rust. Learn Rust with our recommended free books and free tutorials.
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Read our verdict in the software roundup.
| Python Code Formatters | |
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| Ruff | Extremely fast Python linter and code formatter |
| YAPF | Python formatter based on clang-format |
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Read our verdict in the software roundup.
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