I think asyncio + "yield from" is the killer feature for Python 3.x right now. (It's covered briefly in these slides.) Beazley gives it a very detailed treatme

I think asyncio + "yield from" is the killer feature for Python 3.x right now. (It's covered briefly in these slides.) Beazley gives it a very detailed treatment in this amazing YouTube video, which covers not only asyncio's internal implementation, but also explains what coroutines are and when you'd actually benefit from using them in async programming: https://www.youtube.com/watch?v=5-qadlG7tWo https://www.youtube.com/watch?v=5-qadlG7tWo