If I had to guess, I think he's talking about coroutines that allow you to pass data as well as take it out. Python's PEP 342, which expanded python generators

If I had to guess, I think he's talking about coroutines that allow you to pass data as well as take it out. Python's PEP 342, which expanded python generators into truer coroutines, has a decent discussion on the differences. http://www.python.org/dev/peps/pep-0342/ http://www.python.org/dev/peps/pep-0342/