In 3.3.alpha0, the following works fine: sage: list= [[i,j] for i in [-3..3] for j in [-3..3]] sage: [coords for coords in list if (coords[0])^2+(coords[1])^2-1==0] [[-1, 0], [0, -1], [0, 1], [1, 0]]
The following doesn't terminate in a reasonable amount of time: sage: f(x,y)=x^2+y^2-1 sage: list= [[i,j] for i in [-3..3] for j in [-3..3]] sage: [coords for coords in list if f(coords[0],coords[1])==0] In the notebook I can't even interrupt it; I have to restart the worksheet, so maybe there's some horrible recursion going on, but ... I mean, there are only 49 points to check ... right? What am I doing wrong in using a function this way? Thanks, - kcrisman --~--~---------~--~----~------------~-------~--~----~ 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 URLs: http://www.sagemath.org -~----------~----~----~----~------~----~------~--~---
