On Fri, Nov 22, 2013 at 7:22 AM, John Cremona <john.crem...@gmail.com> wrote: > I am trying to use the @fork decorator as described here: > http://www.sagemath.org/doc/reference/parallel/sage/parallel/decorate.html > in order to force a function not to take more run time than some > maximum. The examples on that page all work but this does not. Why > not? > > sage: @fork(timeout=10, verbose=True) > ....: def timedgens(E): > ....: return E.gens(descent_second_limit=10) > ....: > sage: for E in cremona_curves([35..45]): print E.ainvs(), timedgens(E) > > (0, 1, 1, 9, 1) [] > (0, 1, 1, -131, -650) [] > (0, 1, 1, -1, 0) [] > (0, 0, 0, 0, 1) [] > (0, 0, 0, -15, 22) [] > (0, 0, 0, 0, -27) [] > (0, 0, 0, -135, -594) [] > (0, 0, 1, -1, 0) (('X',), <built-in function > generic_factory_unpickle>, (<class > 'sage.schemes.generic.homset.SchemeHomsetFactory'>, (5, 12), > (127763792, 126836816, Category of schemes over Integer Ring), {})) > --------------------------------------------------------------------------- > IndexError Traceback (most recent call last) > > All goes well until the return value is a non-empty list, when this > IndexError is triggered. What on earth is going on?
@fork uses pickle to return results. Maybe pickle doesn't work for the objects you're returning? Can you check pickling/unpickling them directly (without using @fork). William > John > > -- > You received this message because you are subscribed to the Google Groups > "sage-devel" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to sage-devel+unsubscr...@googlegroups.com. > To post to this group, send email to sage-devel@googlegroups.com. > Visit this group at http://groups.google.com/group/sage-devel. > For more options, visit https://groups.google.com/groups/opt_out. -- William Stein Professor of Mathematics University of Washington http://wstein.org -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/groups/opt_out.
