Generators are all the rage. Python has had them for a while, and is now moving rapidly to incorporate them even further, thanks to the Tulip project. JavaScript is getting them in ES6. But why do we care so much about generators? What can do they do for our programs, and for our understanding of how to write and improve those programs? In this talk James Powell shows us just how useful generators can be, and why they’re an important addition to your programming toolbox — in Python, but also in other languages.