A tool for writing Python AST-based refactorings

Looks cool!

I don't do much Python anymore, but I do use a tool like this for Javascript called Prettier (https://github.com/prettier/prettier). I'm not sure if Prefactor is inspired at all by Prettier, but it would be a good source for ideas as Prettier is an absolute game changer for Javascript programmers and makes programming a whole lot more efficient (and fun!). I hope Prefactor (or something like it) could do the same for Python.