Death to tuples!

[Fredrik Lundh]

Paddy wrote:

> I would consider
>  t =  ([1,2], [3,4])
> to be assigning a tuple with two list elements to t.
> The inner lists will be mutable but I did not know you could change the
> outer tuple and still have the same tuple object.

you can't.

but since hash(tuple) is defined in terms of map(hash, t), the resulting
tuple is not hashable.

also see:

    http://effbot.org/zone/python-hash.htm#tuples

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