What is ruff?
Modern Python tooling in 2026
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What is ruff?
0:15
ruff is an extremely fast Python linter and formatter from Astral, also written in Rust. It implements rules from many older tools including flake8, isort, pyupgrade, and increasingly black-style formatting. By 2026 it is the standard linter in the Python ecosystem due to its speed and breadth.
docs.astral.sh