Maybe we need couple other coroutines:
1. asyncio.run_in_executor()
2. asyncio.create_task(). Yes, ensure_future() does the same job but the name is confusing. At least it is confusing for my training course attendees.
Also the are unfortunately tries to use `asyncio.wait()` because the name is very attractive.
But `wait()` doesn't signal about raised exceptions, you know.
That's why proper `wait()` usage is:
while tasks:
done, tasks = await asyncio.wait(tasks, timeout=12)
for t in done:
await t
but nobody call it properly.
`asyncio.gather()` is much better alternative, we should promote it.
[..]
> Sorry, this was a bit tongue in cheek. This was something I said to Guido at the *very* beginning of Tulip development, when asked about mistakes Twisted has made: "don't have a global event loop, you'll never get away from it".
>
> I still think getting rid of a global loop would always be an improvement, although I suspect it's too late at this point. `await current_event_loop()` might make more sense in Asyncio as that's not really "global", similar to Curio's trap of the same design; however, I assume that this was an intentional design disagreement for a reason and I don't see that reason as having changed (as Yury indicates).
The latest update of get_event_loop is a step in the right direction. At least now we can document the best practices:
1. Have one “main” coroutine to bootstrap/run your program;
2. Don’t design APIs that accept the loop parameter; instead design coroutine-first APIs and use get_event_loop in your library if you absolutely need the loop.
3. I want to add “asyncio.main(coro)” function, which would create the loop, run the “coro” coroutine, and correctly clean everything up.
What you propose, IIUC is a step further:
* Deprecate get_event_loop();
* Add “current_event_loop()” coroutine.
This will enforce (1) and (2), making asyncio library devs/users to focus more on coroutines and async/await.
Am I understanding this all correctly?
Yury
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