Pre-PEP: reverse iteration methods

[David Eppstein]

> >      # let inifinite iterators identify themselves     
> >      assert not hasattr(obj, 'infinite') 
> >
> >As infinite iterators are rare, it would not be too cumbersome to let them
> >identify themselves as such.

It would be quite cumbersome to have to identify simple generators as 
infinite or finite manually, and impossible (halting problem) to do so 
reliably automatically.

-- 
David Eppstein                      http://www.ics.uci.edu/~eppstein/
Univ. of California, Irvine, School of Information & Computer Science