For that matter, you can write emacs extensions in python, using Pymacs; given that it's marshalling objects to and from a subprocess over a pipe, it breaks whe

For that matter, you can write emacs extensions in python, using Pymacs; given that it's marshalling objects to and from a subprocess over a pipe, it breaks when anything gets asynchronous, but lately when I've gone beyond "customization" to "actual code", pymacs has made it so much easier that after a few decades with emacs, I really want an open source editor with emacs' richness (and bindings) and python as a first-class extension language.