I like this. Always annoying to explicitly override both __repr__ and __str__ on subclasses of stuff like int when they should be the same. Patch looks good to me; I was originally wondering why some classes were replacing:

__str__ = __repr__

with:

__str__ = object.__str__

but checking their inheritance chains, it's clear *some* overload is needed for consistency, and using object.__str__ means reverting to the default case where subclasses only need to overload __repr__, rather than forcing all subclasses to overload both.