- one for graph deps;

- one for packaging;

- one for managing your project.

Then you can let people like Kenneth build a big friendly wrapper on top of it.

The only problem with those is that it must be pure Python. Otherwise you will have problems. Wheel are not bullet proof, and while you can get away with tinkering for dependencies, you can't with your package manager. It should work out of the box.

But creating "cargo for Python" is a very, very hard job. And nobody will remember you for it.