Reverse dictionnary

[Michael Hudson]

Julien Barbot <barbot at shfj.cea.fr> writes:

> Does "reverse dictionnary" exists in python ?

No.  (At first I thought you meant reverse order, which makes no sense
as dictionaries have no order...)

> I would like to get a value with the key, and to get the key with the value
> For example:
> d1 = {1:"str1", 2:"str2" }
> 
> d1.getvalue(1) give me "str1"
> and 
> g1.getkey("str1") give me 1
> 
> With the result given as fast as normal dictionnaries.

No, and this can't really be done as values of a dictionary aren't
required to be hashable.  Or unique in the dict, for that matter.

> If this does not exists, I will simply do two dictionnaries, one with
> the integer as keys and the strings as values and the other one with
> the strings as keys and the intergers as values.

This is the best approach, I think.

Cheers,
M.

-- 
 Two decades later, well-known hacker Henry Spencer described the 
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 convey his evaluation of the language as exceedingly powerful but 
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