On Fri, Apr 1, 2011 at 12:52 PM, Karl <8213543ggxnvjx...@kabelmail.de>wrote:
> Hello, > > > one beginner question: > > > aList = [0, 1, 2, 3, 4] > > bList = [2*i for i in aList] > > sum = 0 > > for j in bList: > This iterates over the values in bList, not its indices. > sum = sum + bList[j] > So instead of adding bList[0] .. bList[4], consecutively, you're adding bList[0] .. bList[8] skipping every other element - but there aren't that many elements.
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