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This lesson focuses on checking your code for linting errors and understanding Ruff’s output so you know exactly what each rule means.
• Use the sample file one_ring.py from the course materials
• Run ruff check on the current directory and on a single file
• See how Ruff reports linting errors with codes, messages, file names, and line numbers
• Use ruff rule with a specific error code to get detailed, Markdown-style documentation
• List all available Ruff rules with ruff rule --all
• Pipe the output of ruff rule --all into less so you can scroll through all rules
• Access Ruff’s documentation even when the internet is down
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2025/12/13
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