When are immutable tuples *essential*? Why can't you just use lists *everywhere* instead?

[Steven D'Aprano]

On Fri, 20 Apr 2007 15:36:00 -0700, seberino at spawar.navy.mil wrote:

> 
> 
>> The article explains that, amongst other things, tuples are faster
>> than lists, so if you are working with constant values (inmutables)
>> they are more indicated than lists.
> 
> Thanks.  I thought Python's design wasn't so concerned with
> optimizations.
> Adding a new type "just" for optimization reasons seems perhaps
> unnecessary.  I could be wrong.

It's times like this I want to cry...


>>> adict = {(1,2): "parrot"}

Try replacing that tuple with a list. "Just optimization" my eye!


-- 
Steven.