On 1 December 2012 20:12, Dave Angel <d...@davea.name> wrote: > On 12/01/2012 11:28 AM, Brian van den Broek wrote: >> On 1 December 2012 10:40, richard kappler <richkapp...@gmail.com> wrote: >>> I'm working through Mark Lutz's "Python," reviewing the section on lists. I >>> understand the list comprehension so far, but ran into a snag with the >>> matrix. I've created the matrix M as follows: >>> >>> M = [[1, 2, 3[, [4, 5, 6], [7, 8, 9]] >>> >>> then ran through the various comprehension examples, including: >>> >>> diag = [M[i][i] for i in [0, 1, 2]] >>> >>> which, of course, gave me [1, 5, 9]. >>> >>> Then I tried creating revdiag, wanting to return [3, 5, 7], tried several >>> different ways, never quite got what I was looking for, so I'm looking for
<snip my answer> > The only catch to that is it's not what he wants. He said he wants 3, 5, 7 That does seem true. I would suggest that calling the desired function `revdiag' invited the mistake I made. But, it is still on me for not reading closely enough. Best, Brian vdB _______________________________________________ Tutor maillist - Tutor@python.org To unsubscribe or change subscription options: http://mail.python.org/mailman/listinfo/tutor
