We're back after a server migration that caused effbot.org to fall over a bit harder than expected. Expect some glitches.

What is an iterator?

An iterator is an object that represents a stream of data. Unlike a sequence, an iterator can (usually) only provide the next item. The for-in statement uses iterators to control the loop, and iterators can also be used in many other contexts.

To add iteration support to your own classes, implement the __iter__ method.

CATEGORY: programming