dictionary with complex keys

[Frank Niessink]

Stefan Seefeld <seefelds at magellan.umontreal.ca> wrote:
> I'm trying to create a dictionary with the keys being lists.
> How can I do that ? The docs say that only simple types are
> possible as keys. Is there a way to achieve what I want ? May
> be some special operator I need to define...

Without knowing more about your lists, this is difficult to
answer. A simple solution would be to use tuple(mylist) as
key, e.g.:
>>> mylist = [1,2,3]
>>> dict = {}
>>> dict[tuple(mylist)] = 1
>>> dict
{(1, 2, 3): 1}

Another solution could be to subclass UserList and add your
own __hash__() function.

Cheers, Frank

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