[Python-ideas] yield from multiple iterables (was Re: The async API of the future: yield-from)

[Benoit Chesneau]

On Oct 24, 2012, at 7:03 PM, Andrew Francis <andrewfr_ice at yahoo.com> wrote:

> Hi Benoit:
> 
> From: Benoit Chesneau <benoitc at gunicorn.org>
> To: Andrew Francis <andrewfr_ice at yahoo.com> 
> Cc: "python-ideas at python.org" <python-ideas at python.org> 
> Sent: Tuesday, October 23, 2012 5:48 PM
> Subject: Re: [Python-ideas] yield from multiple iterables (was Re: The async API of the future: yield-from)
> 
> 
> On Oct 23, 2012, at 6:51 PM, Andrew Francis <andrewfr_ice at yahoo.com> wrote:
>> AF>This may be tangential to the discussion but in the past, I have used the stackless.py module in conjunction with AF>CPython and greenlets to rapidly prototype parts of Go's model that are not present in Stackless, i.e. the select (ALT) AF>language feature. Rob Pike and Russ Cox were really helpful in answering my questions. Newer stackless.py AF>implementations use continuelets so look for an older PyPy implementation. 
>> AF>I have also prototyped a subset of Polyphonic C# join patterns.  After I got the prototype running, I had an interesting AF>discussion with the authors of "Scalable Join Patterns."
> 
> >Yes saw that. And actually some part of the Task code is based on stackless.py  but using greenlets, >Channels have been slightly modified to be thread-safe and support buffering. Did you release your code >somewhere ? It could be interesting to put the experience further.
> 
> You may be mistaking my work with someone else.
Oh was just saying i made this change.

> 
> I didn't add buffering but that t is relatively easy to do without altering Stackless Python's internals. However I believe that synchronous channels with buffering is a simple and powerful concurrency model. Go's implementers got it right. John Reppy (currently a NSF director) talks about synchronous channel's power in a Concurrent ML book. 
> 
> If  you go to to the Stackless repository example page
> 
> http://code.google.com/p/stacklessexamples/wiki/StacklessExamples
> 
> you will find the code for a modified stackless.py that implements Go's select statement. 

Thanks for the link.
> 
> Since I am giving a talk in Toronto soon, I will soon release a new version of the join pattern version with documentation and examples. The code is about a year old and I have learnt new things.  I can mail you an archive and you are free to play with it and ask questions. 
> 
> Since this is somewhat off-topic, the reason I mention all this is that if you want to experiment with a Go style system, I think it easiest to work from something like stackless.py and greenlets than start from scratch. 
> 
> Cheers,
> Andrew
> 

Right. Actually flower is working well for simle purpose. My goal is more  about testing new ideas about concurrency and async handling on python. Tomorrow I will push a new branch using Futures and libuv in its own thread.


- benoît
> 
> 
> 
> 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mail.python.org/pipermail/python-ideas/attachments/20121024/6b4c64e2/attachment.html>