It's better late than never (and also things were not funny in my life the previous years), I've juste made a release for both Baron and RedBaron to fully support up to python 3 grammar up to python 3.7. This release might not be fully dry yet but it's there.
Baron and RedBaron are 2 projects that works together to allow you to write code that both query and modify python /source/ code programmatically, they can be used to build custom refactoring script, tooling, analysing etc... Baron being the parser and RedBaron the API for humans on top of that.
A huge focus has been put on creating a high level intuitive and powerful API to make those kind of complicated jobs as intuitive and as easy as possible but working on source code is still pretty hard. You can get an good idea in RedBaron's documentation https://redbaron.readthedocs.io (it's full of examples everywhere)
Next steps in the roadmap are as boring as needed:
* maybe python 3.8 support in advance * bug fixes, bugs fixes, bug fixes, bug fixes... * some needed features like the visitor/walker pattern
And that's already a huge amount of work ^^'
I also have R&D plans for exploring if it's possible to create a new generic refactoring syntax tree that could be plug into RedBaron while having no knowledge at all of the input language but that's long term.
Up until recently (for several years) my work on RedBaron was fully volunteer based, if you wish to support it I've opened an OpenCollective for that https://opencollective.com/redbaron/ (and seeing who reports bugs and where they work I know this work is useful). I would also be very interested in doing this kind of research and work professionally for a structure but I'm not really sure where to look.
I'll also be at FOSDEM if you want to say hi :)