[Twisted-Python] So... Python 3.4 is getting its own async I/O system

Stephen Thorne stephen at thorne.id.au
Tue Mar 19 02:04:16 EDT 2013

Not relavent to your questions, but there's a mailing list for discussing
the specifics of PEP 3156, which is worth subscribing to if you want to
provide specific feedback on the API.


On Tue, Mar 19, 2013 at 3:00 AM, Tim Allen <screwtape at froup.com> wrote:

> In Guido's keynote at PyCon 2013, apparently he talked about adding an
> async I/O module to Python 3.4. It looks like his slides can be viewed
> here:
>     https://www.dropbox.com/s/xknbe58zcvjhzhv/PyCon2013.pptx
> ...while this is the PEP he's talking about:
>     http://www.python.org/dev/peps/pep-3156/
> At first glance, the proposed reactor API looks very much like Twisted's
> (or, to be fair, GTK's, or possibly any number of other async event loop
> I'm less familiar with) but rather than Deferreds and callbacks, the API
> will be based around Futures (similar, but not identical, to Python
> 3.2's concurrent.futures.Future class), and an inlineCallbacks-style
> decorator for generators.
> I know Deferreds are awesome, and I don't know much about Futures (and
> I know Twisted core developers have given negative reviews of
> other Deferred/Promise/Future implementations in, say, JavaScript
> libraries before), and inlineCallbacks seems to have a negative
> reputation among experienced Twisted users. Is there anybody on this
> list who knows more about this new PEP (maybe somebody who's at PyCon
> and saw the talk in person) who can give us an informed comparison with
> the current state of Twisted?
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