[Python-ideas] Async API

Laurens Van Houtven _ at lvh.cc
Sat Oct 27 17:16:06 CEST 2012

Yes, thread pools are unfortunately necessary evils.

Twisted comes with a few tools to handle the use cases we're discussing.
The 1:1 equivalent for call_on_thread would be
deferToThread/deferToThreadPool (deferToThread == deferToThreadPool except
with the default thread pool instead of a specific one).

There are a few other tools:

- spawnProcess (equiv to subprocess module, except with async communication
with the subprocess)
- cooperative multitasking, such (twisted.internet.task.) Cooperator and
coiterate: basically resumable tasks that are explicit about where they can
be paused/resumed
- third party tools such as corotwine, giving stackless-style coroutines,
or ampoule, giving remote subprocesses

The more I learn about other stuff the more I see that everything is the
same because everything is different :)

On Sat, Oct 27, 2012 at 12:27 PM, Kristján Valur Jónsson <
kristjan at ccpgames.com> wrote:

> Yes, stacklesslib provides this functionality with the call_on_thread()
> api, which turns a blocking operation into a non-blocking one.  This is
> also useful for cpu bound operations, btw.  For example, in EVE, when we
> need to do file operations and zipping of local files, we do it using this
> api.
> K

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