Python's generators - Հայերեն
http://www.dabeaz.com/finalgenerator/
Generators are a very fascinating concept in python; generators have a wide range of applications from simple lazy evaluation to mind-blowing advanced concurrent execution of tasks (see David Beazley). Before we dive into the fascinating world of python generators, we take a little detour to explain python iterators, a concept that I feel is integral to grasping generators.