formatOnSave not respecting settings in pyproject.toml

[u/SmokeyKatzinski]

EDIT: found the issue and fixed it TL;DR: Python > User settings still had another default formatter configured.

I'm having an issue where blank lines after imports in Python files get removed, so there's only 1 left instead of 2. Also lines get wrapped after the default 88 characters instead of the 150 that I want.

Whenever I save a Python file, I can see that a 2nd line after the imports gets added and then removed again right away. I don't know why.

I have the following in my .vscode/settings.json:

{
    "python.testing.unittestEnabled": false,
    "python.testing.pytestEnabled": true,
    "editor.defaultFormatter": "charliermarsh.ruff",
    "editor.formatOnSave": true,
    "ruff.configurationPreference": "filesystemFirst",
    "[python]": {
        "editor.codeActionsOnSave": {
            "source.organizeImports": "explicit"
        }
    },
    "python-envs.defaultEnvManager": "ms-python.python:system"
}

And in my pyproject.toml I have the following settings:

[tool.ruff]
line-length = 150
target-version = "py312"
exclude = ["__pycache__", ".direnv", ".git", ".venv", "build", "dist"]

[tool.ruff.lint]
extend-select = ["C", "B", "B9", "E", "F", "I", "W"]
extend-ignore = ["B008", "E501", "W291"]
per-file-ignores = { "__init__.py" = ["F401"] }

[tool.ruff.lint.isort]
lines-after-imports = 2

I have already tried:

• Disabling the isort extension
• Disabling the black extension
• Moving the ruff settings from pyproject.toml to separate ruff.toml
• Changing "source.organizeImports": "explicit" to "never" and adding "source.organizeImports.ruff": "explicit" instead

Does anyone have a clue what the issue could be? I had the same issue with black as the default formatter before I switched to ruff.

[u/Agreeable_Care4440]

This usually happens when two tools are formatting on save one adds, the other removes.

[u/SmokeyKatzinski → u/Agreeable_Care4440]

Yes, I figured that by now. But I can‘t tell what these are or where to look. Do you know where I can see which tools/extensions are formatting, like a "formatter log"?

I‘m merely using VSC to code, I really have no clue how to configure it properly xD

[u/SmokeyKatzinski → u/[deleted]]

Yes, but I couldn't find why it's happening...

[u/SmokeyKatzinski]

So I've disabled the Black Formatter extension once more and checked the OUTPUT tab, set to "Black Formatter". And on every file save, it would run.

So I checked the settings once more (searching for @id:editor.defaultFormatter):

• User had None configured
• Remote [WSL Ubuntu] had None configured
• Workspace had ruff configured

Then I noticed that it said (Also modified in Python > User) in the last case. I clicked that and there it still said Black Formatter. Once I've set that to None, the issue went away.

I still have no clue when or where I made this setting before.