Concurrency in Python

More speed by having two rails. Not always true.

Last year, PEP 0492 got accepted, which introduced coroutines and async/await to Python. During that time, I started subscribing to some Python mailing lists and participated in discussions since then. I wondered how ordinary Python developers can write code that can be executed in parallel or at least concurrently. Specifically regarding asyncio (coroutines) and concurrency in general, we got a survey compiled which I want to record here.