Multikey dictionary

[Bengt Richter]

On Tue, 23 Jul 2002 13:26:57 GMT, henk_derudder at hotmail.com wrote:

>Sory for reposting this, I forgot to mention a subject in my first
>post :-)
>
>Hi,
>
>What datatypes can one use as key in a dictionary?
Pretty much anything non-mutable. It'll complain if you
give it something unhashable.
>
>Can I use for example two longs as key (kind of a double key)?
sure, just put them in a tuple and use that as key.

 >>> d={}
 >>> a=[1]
 >>> b=[2]
 >>> d[ (a,b) ] = 'zee'
 Traceback (most recent call last):
   File "<stdin>", line 1, in ?
 TypeError: list objects are unhashable
 >>>
 >>> d[ (1,2) ] = 'one comma two'
 >>> d[ (3,4) ] = 'three comma four'
 >>> d[(1,2)]
 'one comma two'
 >>> a=(1,2)
 >>> d[a]
 'one comma two'
 >>> a=(3,4)
 >>> d[a]
 'three comma four'

>
>If not, are there examples on how to achieve this?
>

Regards,
Bengt Richter