Mastering Python Design Patterns - Second Edition

Real-world examples

Whenever you have a collection of things, and you have to go through the collection by taking those things one by one, it is an example of iterator pattern.

So, there are many examples in life, for instance as follows:

• A classroom where the teacher is going to each student to give them their textbook
• A waiter in a restaurant attending to people at a table, and taking the order of each person

What about software?

As we said, iteration is already in Python as a feature. We have iterable objects and iterators. Container or sequence types (list, tuple, string, dictionary, set, and so on) are iterable, meaning we can iterate through them. Iteration is done automatically for you whenever you use the for or while loop to traverse ...