5. Iterators & Generators — Python Practice Book 5. Iterators & Generators 5.3. Generator Expressions http://anandology.com/python-practice-book/iterators.html iterator 5.4. Itertools 5.2. Generators Iterators & Generators iterator or generator http://anandology.com/python-practice-book/iterators.html 5.1. Iterators iterators or generators