[Python-Dev] Tuples vs. lists

[Aahz Maruch]

Guido van Rossum wrote:
> Aahz:
>>
>> It's a constant.  The BCD module is Binary Coded Decimal; instances are
>> intended to be as immutable as strings and numbers (well, it *is* a
>> number type).  Modifying an instance is guaranteed to produce a new
>> instance.  To a large extent, I guess I feel that if a class is intended
>> to be immutable, each of its underlying data attributes should also be
>> immutable.
> 
> Or you could assign it to a private variable.

And in private e-mail, Guido writes:
>
> I hate to continue harping on this tiny item in public, but what woud
> you do if you needed a constant dictionary?

<grin> <throw up hands>  All right, I guess it's time for me to just
follow the Python motto: "There's only one way, and that way is Guido's."
-- 
                      --- Aahz (@pobox.com)

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