Going from an AST to a PEP8-formatted Python file

[bogdanstate]

This is a bit of an unusual use case, but I am trying to generate some human-readable Python code from Rust. I am interested just in having syntactically valid code for the time being, so compilation is not a concern.

Is there any project currently that allows one to format a rustpython AST to a PEP8-compliant file? I have done some digging around the code base here, but I can't seem to find anything to answer this use case. Any pointers much appreciated (as would be confirmation that this functionality is not supported)!

[bogdanstate]

Thought about this some more, and I guess writing a "reverse parser" for the AST is rather trivial. That + something like autopep8 should do the trick, although it feels a bit hacky to be calling a CLI tool.

[zicklag]

If you wanted to avoid the CLI tool you might be able to use RustPython or PyO3 to embed the Python interpreter and install autopep8 embedded in your rust application.

Granted depending on what your use-case is it might not be worth the effort of figuring out how to embed autopep8. I saw a guide on how to do stuff like that once, I think, with pyo3-pack, but I think its been renamed: https://github.com/PyO3/maturin. But that looks like Rust libraries as Python packages, not the other way around, so I don't know where the instructions I'm thinking of went.

[charliermarsh]

If you were in the business of implementing this yourself, there's logic you can follow from astor: https://github.com/berkerpeksag/astor/blob/master/astor/code_gen.py