The documentation example (getstatusoutput) does not work on windows because it use the default loop (based on select). The whole asyncio.ProactorEventLoop stuff is not really explained anywhere. Maybe a "How to use asyncio on Windows" could be useful.
> The whole asyncio.ProactorEventLoop stuff is not really explained > anywhere. Maybe a "How to use asyncio on Windows" could be useful. It is explained in the subprocess methods of the event loop. Well, I expected this reaction: the subprocess documentation is currently splitted in two parts (event loop and asyncio.subprocess). IMO all functions related to subprocess must be moved to the subprocess page. Here is a patch to group all subprocess documentation. I added a "Connect pipes" section, mentionned that event loop functions are the "low level API" whereas the asyncio.subprocess is the "high level API".
I saw the "low level" part with the warning. But what I mean is that I found no clear indication on how to change default loop to allow asyncio.subprocess usage with Windows Python. I guessed : asyncio.set_event_loop(ProactorEventLoop()) but I'm not sure (it works for me).
This issue has been migrated to GitHub: https://github.com/python/cpython/issues/65205 
