Tricky Dictionary Question from newbie
Mark Jackson
mjackson at alumni.caltech.edu
Mon Jul 11 14:10:26 EDT 2005
"Ric Da Force" <ric at next-level.com.au> writes:
> It is hard to explain but this is what I mean:
>
> Dict = {'rt': 'This is repeated', 'sr': 'This is repeated', 'gf': 'This is
> not'}
>
> I want this to return a new dict with string keys and lists containing the
> previous keys for repeated values.
>
> NewDict = {'This is repeated':['rt','sr'],'This is not':['gf']}
NewDict = {}
for x in Dict.keys():
try:
NewDict[Dict[x]].append(x)
except KeyError:
NewDict[Dict[x]] = [x]
--
Mark Jackson - http://www.alumni.caltech.edu/~mjackson
It is difficult for men in high office to avoid
the malady of self-delusion. - Calvin Coolidge
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