On Thu, 15 Sep 2011 18:57:24 +0200, Stef Mientki wrote: [snip] > Because the list is much larger, I need a shortcut (ok I can use a for loop) > So I tried > >>> B = 3 * [ [ None, None ]] > >>> B[2][0] = 77 > >>> B > [[77, None], [77, None], [77, None]] > > which doesn't work as expected. > > any suggestions ?
>>> b = [[None, None] for i in range(3)] >>> b[2][0] = 77 >>> b [[None, None], [None, None], [77, None]] If you don't understand why the other approach resulted in [[77, None], [77, None], [77, None]], feel free to ask. It's a mistake that I think everybody makes at least once. -- To email me, substitute nowhere->spamcop, invalid->net. -- http://mail.python.org/mailman/listinfo/python-list
