I just found this editor. It's great.
Now to the pioint.
Houdini is 3D package for special effects that comes with shading language that is simmilar to renderman called VEX. Here is documentation for it http://www.sidefx.com/docs/houdini10.0/vex/.
Houdini also uses Python own implementation for scripting called HOM. Documentation link http://www.sidefx.com/docs/houdini10.0/hom/.
Most users use VIM as external editor but I bet they would happily use something different (at least those that are on Windows).
Any chances to for support for those languages ?