Message246486
> 1. You have to manage the lifecycle of the executor yourself, rather than letting asyncio do it for you
> 2. There's no easy process wide way to modify the size of the background task thread pool (or switch to using processes instead)
But if that's what you want, adding a helper or helpers to concurrent.futures makes more sense than adding it to asyncio, which is primarily about using an event loop, *not* threads.
> 3. There's no easy way for background tasks themselves to use asynchronous IO
But how does your proposal help for that? The function passed to background_call() is in no way enabled to do async I/O -- it has no event loop and it is not a coroutine, and it's running in a separate thread.
> With the switch to "background_call" as the name, I'd modify the implementation to detect coroutines and schedule them as tasks rather than running them in the executor.
Honestly, I think that convenience routines that fuzz the difference between synchronous functions (to be run in a thread) and coroutines don't do anyone a service -- an API should educate its users about proper use and the right concepts, and this sounds like it is encouraging staying ignorant.
> However, I think it's clear that the idea and its potential benefits are sufficiently unclear that making the case effectively may require a PEP. That's probably worth doing anyway in order to thrash out more precise semantics.
Or you could just give up. Honestly, I am liking this less and less the more you defend it. That's a classic sign that you should give up. :-) |
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2015-07-09 12:36:36 | gvanrossum | set | recipients:
+ gvanrossum, ncoghlan, pitrou, vstinner, giampaolo.rodola, r.david.murray, yselivanov, srkunze |
2015-07-09 12:36:36 | gvanrossum | set | messageid: <1436445396.27.0.245584600714.issue24571@psf.upfronthosting.co.za> |
2015-07-09 12:36:36 | gvanrossum | link | issue24571 messages |
2015-07-09 12:36:35 | gvanrossum | create | |
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