When to use the iterator in Django ORM?

Iterators are used for traversing an object in Python which implements an iterator protocol. It consists of two methods __iter__() and next().
In Django, good use of an iterator is when you are processing results that take up a large amount of available memory (lots of small objects or fewer large objects).
For more clarification please read when to use and when to not use iterator() in the Python Django ORM
https://stackoverflow.com/questions/12681653/when-to-use-or-not-use-iterator-in-the-django-orm