Ian Bicking wrote: > Iterators look a lot like containers.
Actually, they hardly look like containers at all. About the only thing you can do with a container that you can also do with an iterator is use it in a for-loop. There are a great many other things you *can't* do with an iterator -- index it, slice it, take its len(), etc. In some ways it's rather misleading that you're allowed to say for x in iterator: because the items are not "in" the iterator, they're *produced* by the iterator on demand. I've speculated that perhaps it should be illegal to use an iterator that way, and you would instead have to say for x from iterator: This would force people to keep the distinction firmly in mind and might lead to less confusion. Greg _______________________________________________ Python-3000 mailing list Python-3000@python.org http://mail.python.org/mailman/listinfo/python-3000 Unsubscribe: http://mail.python.org/mailman/options/python-3000/archive%40mail-archive.com
