Creating Your Own Iterator
Explore how to create your own iterator class in Python by defining the __iter__ and __next__ methods. Understand using internal state to track iteration and raising StopIteration to signal completion. This lesson helps you grasp iterator mechanics beyond generators.
We'll cover the following...
We'll cover the following...
Just out of interest, we will create a couple of iterators of our own. In fact, you will probably never need to do this, as it is almost always better to use generators instead, so the rest of the chapter is pretty much optional and for background information only.
This section assumes you know the basics of creating Python classes.
An iterator is just a class that implements a __next__ method and an __iter__ method. Notice that these functions have double ...