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| References | (11 earlier) <87h9udb1eq.fsf@jester.gateway.pace.com> <mailman.19058.1424676730.18130.python-list@python.org> <87bnkkb22u.fsf@jester.gateway.pace.com> <mailman.19110.1424737905.18130.python-list@python.org> <871tlgaxi7.fsf@jester.gateway.pace.com> |
|---|---|
| Date | 2015-02-24 13:03 +1100 |
| Subject | Re: Future of Pypy? |
| From | Chris Angelico <rosuav@gmail.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.19113.1424743389.18130.python-list@python.org> (permalink) |
On Tue, Feb 24, 2015 at 12:50 PM, Paul Rubin <no.email@nospam.invalid> wrote:
> Chris Angelico <rosuav@gmail.com> writes:
>>> What if you want to dynamically construct a callable and send it to
>>> another process?
>> I'm not sure what that would actually mean. Do you try to construct it
>> out of code that already exists in the other process? Are you passing
>> actual code to the other process?
>
> I gave an example in a reply to Steven, something like
>
> other_thread_queue.put(lambda x: x*x)
>
> to tell the other thread it is supposed to square something. It
> receives a callable and calls it in its own context.
So, you would have to pass code to the other process, probably. What about this:
y = 4
other_thread_queue.put(lambda x: x*y)
Or this:
y = [4]
def next_y():
y[0] += 1
return y[0]
other_thread_queue.put(next_y)
It may not be obvious with your squaring example, but every Python
function has its context (module globals, etc). You can't pass a
function around without also passing, or sharing, its data.
With threads in a single process, this isn't a problem. They all
access the same memory space, so they can all share state. As soon as
you go to separate processes, these considerations become serious.
ChrisA
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Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 12:45 +0000
Re: Future of Pypy? jkn <jkn_gg@nicorp.f9.co.uk> - 2015-02-22 04:58 -0800
Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 15:30 +0000
[OT] - BASIC is still not a bad choice, was Re: Future of Pypy? Michael Torrie <torriem@gmail.com> - 2015-02-23 17:24 -0700
Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 14:27 +0100
Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 15:36 +0000
Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 18:22 +0100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 11:02 -0800
Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 20:51 +0100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 12:14 -0800
Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 23:13 +0100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 18:45 -0800
Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-23 12:18 +1100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 18:04 -0800
Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-23 13:16 +1100
Re: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-23 03:16 +0000
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 19:45 -0800
Re: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-23 04:00 +0000
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-22 22:13 -0800
Re: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-23 07:32 +0000
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 16:11 -0800
Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 11:31 +1100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 17:50 -0800
Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 13:03 +1100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 20:40 -0800
Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 17:57 +1100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-27 13:40 -0800
Re: Future of Pypy? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-02-27 18:47 -0500
Are threads bad? - was: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-24 00:35 +0000
Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 21:27 -0800
Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 16:57 +1100
Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 22:23 -0800
Re: Are threads bad? - was: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-24 10:08 +0200
Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-24 15:53 -0800
Re: Are threads bad? - was: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-25 07:25 +0200
Re: Are threads bad? - was: Future of Pypy? Marcos Almeida Azevedo <marcos.al.azevedo@gmail.com> - 2015-02-25 13:34 +0800
Re: Are threads bad? - was: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-25 07:46 +0200
Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-25 16:54 +1100
Re: Are threads bad? - was: Future of Pypy? Marcos Almeida Azevedo <marcos.al.azevedo@gmail.com> - 2015-02-25 13:58 +0800
Re: Are threads bad? - was: Future of Pypy? Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-24 23:02 -0700
Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-25 17:07 +1100
Re: Are threads bad? - was: Future of Pypy? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-25 16:37 +0000
Re: Are threads bad? - was: Future of Pypy? Ian Kelly <ian.g.kelly@gmail.com> - 2015-02-25 10:00 -0700
Re: Are threads bad? - was: Future of Pypy? Mark Lawrence <breamoreboy@yahoo.co.uk> - 2015-02-25 17:16 +0000
Re: Are threads bad? - was: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-26 04:22 +1100
Re: Are threads bad? - was: Future of Pypy? Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2015-02-25 19:44 -0500
Re: Are threads bad? - was: Future of Pypy? Ryan Stuart <ryan.stuart.85@gmail.com> - 2015-02-25 00:59 +0000
Re: Are threads bad? - was: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-26 21:55 -0800
Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-23 14:25 +1100
Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-23 18:41 +1100
Re: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-23 10:16 +0200
Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-23 20:19 +1100
Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 17:56 +1100
Re: Future of Pypy? Chris Angelico <rosuav@gmail.com> - 2015-02-24 18:16 +1100
Re: Future of Pypy? wxjmfauth@gmail.com - 2015-02-23 23:57 -0800
Re: Future of Pypy? Ethan Furman <ethan@stoneleaf.us> - 2015-02-23 11:39 -0800
Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-24 13:15 +1100
Re: Future of Pypy? Paul Rubin <no.email@nospam.invalid> - 2015-02-23 17:47 -0800
Re: Future of Pypy? Marko Rauhamaa <marko@pacujo.net> - 2015-02-24 10:12 +0200
Re: Future of Pypy? Emile van Sebille <emile@fenx.com> - 2015-02-24 09:57 -0800
Re: Future of Pypy? Steven D'Aprano <steve+comp.lang.python@pearwood.info> - 2015-02-23 01:05 +1100
Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 15:44 +0000
Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-22 19:20 +0000
Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-22 22:45 +0100
Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-23 14:04 +0000
Re: Future of Pypy? Laura Creighton <lac@openend.se> - 2015-02-23 17:16 +0100
Re: Future of Pypy? Terry Reedy <tjreedy@udel.edu> - 2015-02-23 01:34 -0500
Re: Future of Pypy? Dave Cook <davecook@nowhere.net> - 2015-02-23 11:36 +0000
Re: Future of Pypy? Dave Farrance <DaveFarrance@OMiTTHiSyahooANDTHiS.co.uk> - 2015-02-23 14:13 +0000
Cython - was: Future of Pypy? Stefan Behnel <stefan_ml@behnel.de> - 2015-02-23 16:43 +0100
Re: Future of Pypy? Dave Cook <davecook@nowhere.net> - 2015-02-23 23:23 +0000
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