Is it possible to call ruff format within Python (not using subprocess)?

[travis-cook-sfdc]

Use case is that I'm using jinja to codegen some python files. Jinja has whitespace control, but it's tedious, so I'd like to call ruff on the string (containing python) to format the code.

I'm able to call subprocess.run(['ruff', 'format', ...]) after the files are completed.

However, I'd also like to write tests on my jinja templates and it would be really nice to be able to call ruff directly on the strings in my tests so that I don't need to spend time fiddling with whitespace differences.

[MichaReiser]

There's currently no existing way to call Ruff format from within Python other than using:

• subprocess
• ruff server and using the LSP protocol
• Soon: Use WASM

See #659