Thanks for this - I hadn't seen it before. Looks like an implementation of the core Python interpreter designed to work more like the reference interpreter for Lua.

Unfortunately it seems to be incomplete - and even if support for exceptions etc were added, I suspect some of Python's more highly dynamic features (e.g. inspection of stack frame objects) would be extremely difficult to support in a compatible way.

I think supporting such niche dynamic features would be essential - I've found the Python community to be strongly against the idea of changing (or removing) such features in the pursuit of increased performance.