Web Reference: An iterator is an object that can be iterated upon, meaning that you can traverse through all the values. Technically, in Python, an iterator is an object which implements the iterator protocol, which consist of the methods __iter__() and __next__(). Sep 3, 2025 · Although the terms iterator and iterable sound similar, they are not the same. An iterable is any object that can return an iterator, while an iterator is the actual object that performs iteration one element at a time. In Python, an iterator is an object that allows you to iterate over collections of data, such as lists, tuples, dictionaries, and sets. Python iterators implement the iterator design pattern, which allows you to traverse a container and access its elements.
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