[Python-Dev] Single- vs. Multi-pass iterability

[Guido van Rossum]

> Would it be good to use __next__() if it exists, else try next()?

Then the code in typeobject.c (e.g. resolve_slotdups) would have to
map tp_iternext to *both* __next__ and next.

> This doesn't fix the current 'wart,' however, it could allow
> moving closer to the desired end.  It could cause confusion.
> For compatability, one would only need to do:
> 
> 	next = __next__
> 
> or vica versa.
> 
> Not sure this is worth it.  But if there is a transition, it could
> ease the pain.

I don't think it's worth it.

--Guido van Rossum (home page: http://www.python.org/~guido/)