Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > comp.lang.python > #58386
| From | Mark Lawrence <breamoreboy@yahoo.co.uk> |
|---|---|
| Subject | Re: multiprocessing: child process race to answer |
| Date | 2013-11-03 10:24 +0000 |
| References | <f71ef852-81ee-4ce6-beaa-17a881ed6d16@googlegroups.com> <0e33c77e-3489-44ac-ba5c-2507adc5e827@googlegroups.com> |
| Newsgroups | comp.lang.python |
| Message-ID | <mailman.1976.1383474301.18130.python-list@python.org> (permalink) |
On 03/11/2013 10:10, cappleman@gmail.com wrote: > On Friday, November 1, 2013 10:35:47 PM UTC-4, smhall05 wrote: >> I am using a basic multiprocessing snippet I found: >> >> >> >> #----------------------------------------------------- >> >> from multiprocessing import Pool >> >> >> >> def f(x): >> >> return x*x >> >> >> >> if __name__ == '__main__': >> >> pool = Pool(processes=4) # start 4 worker processes >> >> result = pool.apply_async(f, [10]) # evaluate "f(10)" asynchronously >> >> print result.get(timeout=1) >> >> print pool.map(f, range(10)) # prints "[0, 1, 4,..., 81]" >> >> #--------------------------------------------------------- >> >> >> >> I am using this code to have each process go off and solve the same problem, just with different inputs to the problem. I need to be able to kill all processes once 1 of n processes has come up with the solution. There will only be one answer. >> >> >> >> I have tried: >> >> >> >> sys.exit(0) #this causes the program to hang >> >> pool.close() >> >> pool.terminate >> >> >> >> These still allow further processing before the program terminates. What else can I try? I am not able to share the exact code at this time. I can provide more detail if I am unclear. Thank you > > You could take a look at the Mutiprocessing module capabilities for exchanging objects between processes: > > http://docs.python.org/3.3/library/multiprocessing.html#exchanging-objects-between-processes > Would you please read and action this as it prevents the double line spacing that you can observe above, thanks https://wiki.python.org/moin/GoogleGroupsPython -- Python is the second best programming language in the world. But the best has yet to be invented. Christian Tismer Mark Lawrence
Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread
multiprocessing: child process race to answer smhall05 <smhall05@gmail.com> - 2013-11-01 19:35 -0700
Re: multiprocessing: child process race to answer MRAB <python@mrabarnett.plus.com> - 2013-11-02 02:52 +0000
Re: multiprocessing: child process race to answer smhall05 <smhall05@gmail.com> - 2013-11-01 22:03 -0700
Re: multiprocessing: child process race to answer William Ray Wing <wrw@mac.com> - 2013-11-02 08:17 -0400
Re: multiprocessing: child process race to answer Sherard Hall <smhall05@gmail.com> - 2013-11-02 11:44 -0400
Re: multiprocessing: child process race to answer (forgot to Cc: the list) William Ray Wing <wrw@mac.com> - 2013-11-02 23:07 -0400
Re: multiprocessing: child process race to answer cappleman@gmail.com - 2013-11-03 02:10 -0800
Re: multiprocessing: child process race to answer Mark Lawrence <breamoreboy@yahoo.co.uk> - 2013-11-03 10:24 +0000
csiph-web