Shi Mu wrote:
> I have a list like [[1,4],[3,9],[2,5],[3,2]]. How can I sort the list
> based on the second value in the item?
> That is,
> I want the list to be:
> [[3,2],[1,4],[2,5],[3,9]]
since you seem to be using 2.3, the solution is to use a custom
compare function:
>>> L = [[1,4],[3,9],[2,5],[3,2]]
>>> def mycmp(a, b):
... return cmp(a[1], b[1])
...
>>> L.sort(mycmp)
>>> L
[[3, 2], [1, 4], [2, 5], [3, 9]]
under 2.4, you can use the key argument together with the item-
getter function to sort on a given column; look for "itemgetter" on
this page for some examples:
http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/305304
</F>
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