What are iterators in Python and how do they work?

What are iterators in Python and how do they work?

Iterators in Python are objects that allow you to traverse through a collection, like lists or tuples, one element at a time.

Can you give me an example of how to create an iterator?

Sure! You can create an iterator by defining a class with __iter__() and __next__() methods. Here's a simple example:

What does the __iter__() method do?

The __iter__() method returns the iterator object itself. It's required to make an object iterable.

How do I use an iterator in a for loop?

You can use an iterator in a for loop just like any other iterable. The loop will automatically call __next__() until it raises a StopIteration exception.