On 13 okt, 03:39, kcrisman <kcris...@gmail.com> wrote: > On Oct 12, 6:37 pm, Robert Samal <robert.sa...@gmail.com> wrote: > > > > > I observed that solve behaves inconsistently in the following regards: > > > sage: solve([x==1,x==-1],x) > > [] > > > (this is as expected) > > However: > > > solve([x==1,x==-1],x, solution_dict=True) > > > produces an error message. Easy to live with, but I was scared when I > > first saw it :-). > > > It should be easy to correct, as the message reveals that the function > > is trying to look at the 0-th > > element of an empty list ... > > > /data/local/sage/local/lib/python2.6/site-packages/sage/symbolic/ > > relation.pyc in solve(f, *args, **kwds) > > 672 sol_list = string_to_list_of_solutions(repr(s)) > > 673 if 'solution_dict' in kwds and > > kwds['solution_dict']==True: > > --> 674 if isinstance(sol_list[0], list): > > 675 sol_dict=[dict([[eq.left(),eq.right()] for eq > > in solution]) > > 676 for solution in sol_list] > > Yup. solve() probably needs a general overhaul (and has for a while), > but no one has had the time to do so. With that in mind, could you > open a ticket on the Trac server for this issue and point out the > solution? (If you are really ambitious, you can contribute a patch as > well!) > > Thanks! > > - kcrisman
If a Trac ticket is opened, please mention also http://groups.google.com/group/sage-support/browse_thread/thread/732e411e3b01aa1a/8654d892cf327d38?lnk=gst&q=roland#8654d892cf327d38 Roland -- To post to this group, send email to sage-support@googlegroups.com To unsubscribe from this group, send email to sage-support+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sage-support URL: http://www.sagemath.org
