8000 Does ruff ignore private modules? · astral-sh ruff · Discussion #21631 · GitHub
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tazr
Nov 25, 2025

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Answered by amyreese Nov 26, 2025

I suspect this is a behavior of the D1xx rules, not Ruff.

If I have both foo.py and _foo.py that trigger an F401 error, then Ruff reports that in both files:

$ uvx ruff check --isolated --select F .
F401 [*] `os` imported but unused
 --> _foo.py:1:8
  |
1 | import os
  |        ^^
  |
help: Remove unused import: `os`

F401 [*] `os` imported but unused
 --> foo.py:1:8
  |
1 | import os
  |        ^^
  |
help: Remove unused import: `os`

Found 2 errors.
[*] 2 fixable with the `--fix` option.
> [1]

You can confirm what files Ruff is inspecting with the --show-files flag:

$ uvx ruff check --isolated --select F . --show-files
/Users/amethyst/scratch/ruff/_foo.py
/Users/amethyst/scratch/ruff/f…
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amyreese
Nov 26, 2025
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Answer selected by tazr
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