>>> For those of us not following this thread closely, can you identify
>>> cases where tuples are mutable, not hashable or can't be used as
>>> dictionary keys? I've never encountered any such cases.
>>
>> t = ([1,2], [3,4])
...
>>>> t = ([1,2], [3,4])
>>>> t[0] += [5]
aahz> Traceback (most recent call last):
aahz> File "<stdin>", line 1, in ?
aahz> TypeError: object doesn't support item assignment
>>>> t
aahz> ([1, 2, 5], [3, 4])
aahz> (I'm pretty sure Skip has seen this before, but I figure it's a
aahz> good reminder.)
Actually, no, I hadn't. I don't use tuples that way. It's rare when I have
a tuple whose elements are not all floats, strings or ints, and I never put
mutable containers in them.
Skip
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