keys in dictionary

Georges Barthelemy barthelemy.georges at
Tue Nov 22 18:09:48 CET 2005

use (1,2) , (3,4)....

"Shi Mu" <samrobertsmith at> a écrit dans le message de news: 
mailman.987.1132638229.18701.python-list at
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 

>>> p=[[1,2],[4,3],[6,9]]
>>> n=dict([(x,[]) for x in p])
Traceback (most recent call last):
  File "<interactive input>", line 1, in ?
TypeError: list objects are unhashable

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