[Chicago] Asynchronous I/O in Python 3 (and more analogies)

Brantley Harris deadwisdom at gmail.com
Sat Jul 13 21:47:30 CEST 2013

On Fri, Jul 12, 2013 at 8:30 PM, Feihong Hsu <feihong.hsu at gmail.com> wrote:

> I've upload the slides from last night's talk:
> http://www.slideshare.net/megafeihong/tulip-24190096
> And also pushed the repository for all the examples and demos from the
> talk: https://github.com/feihong/tulip-talk
> There were a few loose threads from last night that I'd like to address.
> Tornado.
> Someone had asked me about Tornado, and I said that I didn't have an
> opinion on it. That's actually not true, I just somehow forgot my own
> opinion. I looked into Tornado a while back and decided against using it
> because it doesn't work on Windows (Twisted, gevent, Tulip, etc. all do).
> I'm not saying that Tornado sucks, but I prefer a cross-platform solution
> for a lot of my projects.
> To continue my analogy, if programming with Twisted is like being a
> mystical ninja warrior, than programming with Tornado is like being a
> mystical ninja warrior who suffers from some kind of childhood trauma that
> prevents his shadow clones from fighting killer robots. I'd hire the
> Tornado ninja for a fight in Hell, but I'd leave him behind if there was a
> brouhaha at the Isaac Asimov museum.
> Gevent and eventlet.
> Someone brought up gevent, and claimed that it's easier to use than
> Twisted and Tulip. I have to agree -- greenlets hide all the messy details
> so you don't need to worry about callbacks or yield from syntax. I don't
> have any personal experience with greenlets, but here is a very recent
> article that addresses the pros and cons:
> http://mrjoes.github.io/2013/06/21/python-realtime.html. I'll also note
> that gevent and eventlet aren't yet compatible with Python 3 (although the
> greenlet module has been ported, so it's just a matter of time).
> I don't love talking about things I don't understand, but I love making
> analogies, so I'll leave you with this: Programming with greenlets is like
> running around while juggling three standard beanbag balls (apparently this
> is called joggling). Some people you encounter will be AMAZED that you can
> joggle at all (usually the very old or the very young). Other bystanders
> will annoyingly ask if you can also joggle cats, shotguns, flamethrowers,
> your mom, etc. (these people are typically hipsters, Republicans, ninjas,
> or your dad). After a while you get distracted by all the dumbass questions
> and you drop all your balls -- one of them goes down a storm drain, another
> plops into a mud puddle, the last one bounces into your crotch for some
> reason and you're so mad you hurl it into the sun and swear off joggling
> forever. Then the next day you're back out there joggling, because hey it's
> a free country and some people like it so shut up you hater.

I love you Feihong.

> Wishing you a wunderbar weekend,
> Feihong
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> Chicago at python.org
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