By "C" libraries you just mean that python and rust talk to eachother via the same ABI that C happens to use, there doesn't need to actually be any C involved.

By "C" libraries you just mean that python and rust talk to eachother via the same ABI that C happens to use, there doesn't need to actually be any C involved. Since python is generally the cPython implementation of python there is, but you could substitute that out for something else (i.e. a python implementation written in Java) and actually have no C without modifying anything else. Well, except for the fact that the JVM and OS is written in C, but you could swap out that JVM and OS for...