Todd, I think you want a frontend, not a backend. The frontend would take in normal Python and convert it to RPython. RPython seems to have infinite meta-programming possibilities, so its just a matter of how hard would it be to make the meta frontend. Probably too hard since python is so dynamic, but maybe its possible with a new subset of Python halfway to RPython, developers would then only have to port to Not-So-Restricted-Python, and then the frontend does the final job of converting to RPython. -brett
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