Hi Raymond. I appreciate your reply. Yes, this is exactly what I was
looking for. The syntax I had been trying to work out myself was not
correct and not giving me the right thing. Many thanks for your help -
this works just the way I wanted.
David
On Tuesday, March 8, 2005, at 03:46 PM, Raymond Hettinger wrote:
Another way is to build out the sort_by_key function to handle
multiple fields:
def sort_by_key(list, i, j, k):
list.sort(lambda a, b: cmp((a[i], a[j], a[k]), (b[i], b[j],
b[k])))
In Py2.4, the key= option offers an alternative to cmp which is
simpler and
faster:
def sort_by_key(list, i, j, k):
list.sort(key = lambda a : (a[i], a[j], a[k]))
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