While we're talking about annoyances
Arnaud Delobelle
arnodel at googlemail.com
Sun Apr 29 12:48:46 EDT 2007
On Apr 29, 5:33 pm, Paul Rubin <http://phr...@NOSPAM.invalid> wrote:
> Steven D'Aprano <s... at REMOVE.THIS.cybersource.com.au> writes:
> > I recently needed to write a function to generate a rank table from a
> > list. That is, a list of ranks, where the rank of an item is the position
> > it would be in if the list were sorted:
>
> > alist = list('defabc')
> > ranks = [3, 4, 5, 0, 1, 2]
>
> fst = operator.itemgetter(0) # these should be builtins...
> snd = operator.itemgetter(1)
>
> ranks=map(fst, sorted(enumerate(alist), key=snd))
This is what the OP calls the index table, not the ranks table (both
are the same for the example above, but that's an unfortunate
coincidence...)
--
Arnaud
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