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

[Guido van Rossum]

> > Would making them cooperate with GC be a difficult
> > thing to do? Seems to me we should be moving towards
> > making everything cooperate with GC, and fixing
> > things like this whenever they come to light.
> 
> Tim Peters says it wouldn't be, but I have not explored that.

But he also warned that it introduces new surprises.

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