On Mon, 27 Oct 2014 09:01:57 -0700, uma...@gmail.com wrote: > I use python 3.4.0 version. In the course of developing / running a > python program, I have encountered a problem. I have reproduced below a > simple program to bring it out. > > >>>> d = [[0]*3]*4 dd = [1,2,3,4,5,6,7,8,9,10,11,12] >>>> for i in range(4): > ... for j in range(3): d[i][j] = dd[i*3+j] > ... >>>> d > [[10, 11, 12], [10, 11, 12], [10, 11, 12], [10, 11, 12]] >>>> > d is not transferred to dd as expected? > Of course I can use 'append' & do my job (less elegantly though).
Not sure if this is elegant or not: d = [[list(range(1,13))[i*3+j] for j in range(3)] for i in range(4)] but it seems to be a one-line solution for what you're trying to do. -- Denis McMahon, denismfmcma...@gmail.com -- https://mail.python.org/mailman/listinfo/python-list
