Ruff

Features

• Inspection and highlighting
• Integrating Reformat Code with ⌥⇧ ⌘ L or Ctrl+Alt+L
• Quick Fix (from mouse-over, ⌥⏎ or Alt+Enter)
  • Show fix message
  • Suppressing warnings with # noqa:
• Show code explanation tooltips when hovering # noqa: <code>
• Run ruff --fix as an action
• Run ruff --fix for a file when the file is saved
• Detect both global and project-specific instances of ruff
  • Always use global ruff command
  • Custom global ruff executable path
  • Detect a project ruff after packages refreshed
• Execute ruff command as a new process
• Support ruff config file path as an option
• Detect ruff executable in Conda environment
• Detect ruff executable in WSL
• Support Ruff LSP feature
  • LSP Client
    • JetBrains LSP integration for unified PyCharm, including free mode
    • LSP4IJ by RedHat (Requires installation of the LSP4IJ plugin)
  • LSP Server
    • ruff-lsp integration
    • ruff server integration
  • Live Config Reload: Automatically updates from pyproject.toml and ruff.toml without restarting
• Support ruff format for ruff version 0.0.289 or later [Experimental]

JetBrains LSP client support

In unified PyCharm builds, including free mode, you can enable the JetBrains LSP client in Preferences/Settings -> Tools -> Ruff.

PyCharm made the LSP client APIs available without a paid subscription starting with 2025.1: https://platform.jetbrains.com/t/update-on-lsp-and-template-language-apis-in-pycharm/1453

The lsp integration applies only below features:

• Errors/warnings highlighting (textDocument/publishDiagnostics)
• Quick-fixes for these errors/warnings (textDocument/codeAction

This is experimental feature.

Screenshots