Ross wrote: > >>> myList[1]= myList[1]+1
The problem is this makes myList[1] point to a new integer, and not the one that peas points to. Python 2.5.1 (r251:54863, Jul 10 2008, 17:25:56) [GCC 4.1.2 20070925 (Red Hat 4.1.2-33)] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> oats=[1] >>> peas=[6] >>> mylist = [oats, peas] >>> mylist[1][0] = mylist[1][0]+1 >>> mylist [[1], [7]] >>> peas [7] This is because integers are immutable, but lists are mutable. -- Jeremy Sanders http://www.jeremysanders.net/ -- http://mail.python.org/mailman/listinfo/python-list
