Another approach is to subclass dict such that each time you add a
key:value pair you also create an entry in a reverse dictionary. Then
all you need do is lookup in the reverse dictionary.
If there are several keys with the same value, then create and extend a
list of values in the reverse dictionary.
This will fail (as any other reverse dictionary approach will) if the
values are not hashable
--
Bob Gailer
919-636-4239
Chapel Hill NC
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