Ruff

Ruff is a Python linter and code formatter written in Rust, designed to be significantly faster than existing Python-based tools like Flake8 and Black. It integrates the functionality of multiple linters (Flake8, isort, pydocstyle, pyupgrade, autoflake) and formatters (Black) into a single tool, reducing the overhead of managing multiple dependencies. Ruff leverages Rust's performance characteristics to achieve speeds 10-100x faster than traditional Python linters. It supports pyproject.toml configuration, Python 3.14 compatibility, and built-in caching to avoid re-analyzing unchanged files. The tool also offers fix support for automatic error correction, making it easier to maintain code quality and consistency. It's used by major open-source projects like Apache Airflow, FastAPI, and Pandas, indicating its reliability and effectiveness in large codebases.