Comment by albertzeyer

There is also RPython (used by PyPy) (https://rpython.readthedocs.io/), which is a strict subset of Python, allowing for static analysis, specifically for the translation logic needed by PyPy. Thus, I was told that RPython is not really intended as a general purpose language/compiler but only really specifically to implement sth like PyPy.

But it's anyway maybe an interesting comparison to Codon.