On Thu, Jul 11, 2013 at 5:15 PM, Steven D'Aprano <st...@pearwood.info> wrote: > On Thu, 11 Jul 2013 17:06:39 +1000, Chris Angelico wrote: > >> On Thu, Jul 11, 2013 at 4:06 PM, Steven D'Aprano <st...@pearwood.info> >> wrote: >>> I think the right solution here is the trivial: >>> >>> def exhaust(it): >>> """Doc string here.""" >>> deque(maxlen=0).extend(it) >>> >>> >>> which will be fast enough for all but the tightest inner loops. But if >>> you really care about optimizing this: >>> >>> >>> def factory(): >>> eatit = deque(maxlen=0).extend >>> def exhaust_iter(it): >>> """Doc string goes here""" >>> eatit(it) >>> return exhaust_iter >>> >>> exhaust_it = factory() >>> del factory >>> >>> >>> which will be about as efficient as you can get while still having a >>> custom docstring. >> >> Surely no reason to go for the factory function: >> >> def exhaust(it,eatit=deque(maxlen=0).extend): >> eatit(it) > > Now you have the function accept a second argument, which is public, just > to hold a purely internal reference to something that you don't want the > caller to replace.
True, but doesn't that happen fairly often with default args? Usually it's in the "int=int" notation to snapshot for performance. ChrisA -- http://mail.python.org/mailman/listinfo/python-list
