On Tue, Aug 26, 2008 at 1:24 PM, Eric Abrahamsen <[EMAIL PROTECTED]> wrote: > On Aug 26, 2008, at 7:20 PM, Kent Johnson wrote:
>> If all you want to do with the nested Month, etc is to iterate the >> events in them, you could probably use a shared iterator. It would >> have to be able to push-back items so that when you hit the >> out-of-range item you could push it back on the iterator. > > Is a 'shared iterator' something special, or do you mean all the instances > would draw their events from a single iterator? I'm not sure what this would > look like. It's nothing special, I just mean that all instances would share an iterator. You would pass the iterator to the iteration function. > Just for the sake of argument, here's the principle I'm working from: > > ##### >>>> lst = range(10) >>>> iterlst = iter(lst) >>>> iterlst.next() > 0 >>>> for x in iterlst: > ... if x < 5: > ... print x > ... else: > ... break > ... > 1 > 2 > 3 > 4 >>>> for x in iterlst: > ... print x > ... > 6 > 7 > 8 > 9 > ##### > > So that's why I'm creating the iterator outside of the while loop in the > original code, and then using a repeated for loop with a break to step > through all the events only once. Of course, the fact that 5 isn't in there > probably points to the source of my problems! The solution might be > assigning iterlist.next() to a variable, and advancing the variable. The problem is that the first loop consumes the 5 from the iterator but doesn't actually process it. That is why you need an iterator with push-back - so you can put the 5 "back in" the iterator and get it out again in the next loop. http://code.activestate.com/recipes/502304/ Though working with indices directly might be simpler. Kent _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
