On Tue, 28 Oct 2014 01:29:28 +0000, Joshua Landau wrote: > On 28 October 2014 00:36, Denis McMahon <denismfmcma...@gmail.com> > wrote: >> >> d = [[list(range(1,13))[i*3+j] for j in range(3)] for i in range(4)] > > A quick note. Ranges (even 2.7's xrange) are all indexable. The cast to > a list isn't needed.
Until you apply Chris' slicing trick, and then: >>> [list(range(1,13))[i*3:i*3+3] for i in range(4)] [[1, 2, 3], [4, 5, 6], [7, 8, 9], [10, 11, 12]] >>> [range(1,13)[i*3:i*3+3] for i in range(4)] [range(1, 4), range(4, 7), range(7, 10), range(10, 13)] >>> Depends how important it is that you get a list and not a range object ;) (Thinking back to a recent discussion where someone was taking str(range (x)) and not getting the expected results) -- Denis McMahon, denismfmcma...@gmail.com -- https://mail.python.org/mailman/listinfo/python-list
