Hence "To model indexing after Python". I figure Python's probably a good source of inspiration for Python-like features. ;)
Admittedly, I can't find specific rationale for IndexErrors discussed anywhere. Perhaps throwing errors for egregious indices just seems the "sane" thing to do. Essentially, it's a choice of foist: if indexing wraps around infinitely, you need to check bounds when you don't want to wrap around; if indexing throws errors, you need to mod explicitly when you do want to wrap around.
> if indexing wraps around infinitely, you need to check bounds when you don't want to wrap around; if indexing throws errors, you need to mod explicitly when you do want to wrap around.
Good summary. I agree that index-out-of-bound errors are the saner default.
