keys in dictionary

["Martin v. Löwis"]

Shi Mu wrote:
> I run the following code and got wrong message, but I still want to 
> make [1,2],[4,3] and [6,9] to be keys of the dictionary or change the
> style a little bit. How to do that?

Make them tuples:

 >>> p=[[1,2],[4,3],[6,9]]
 >>> n=dict([(tuple(x),[]) for x in p])
 >>> n
{(6, 9): [], (1, 2): [], (4, 3): []}

Regards,
Martin

P.S. Please don't cross-post.