[linsomniac]

I don't think this IS a PEP, I believe it is simply something the uv tool supports and as far as Python is concerned it is just a comment.

[mkl]

https://peps.python.org/pep-0723/

[linsomniac]

Thank you for the pointer, I had searched for it but couldn't find it. (edit: Glad I spent the downvotes to get educated :-)

[zanie]

No, this is a language standard now (see PEP 723)