"Carlos Laviola" <carlos.laviola at gmail.com> wrote >>>> i > [0, 1, 2] >>>> j > [2, 1, 0] > > Theoretically, I could then just iterate over range(len(M)) and grab > M[i[N]j[N]], but that's not legal. What would be the right way of > doing > this? M [ i[N] ] [ j[N] ] You just missed a couple of brackets... HTH, Alan G