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Re: what happens inside?

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  Re: what happens inside? Tim Rowe <digitig@gmail.com> - 2011-06-22 17:08 +0100

#8222 — Re: what happens inside?

On 22 June 2011 16:53, Andrew Berg <bahamutzero8825@gmail.com> wrote:
> On 2011.06.22 10:45 AM, Chetan Harjani wrote:
>> why tuples are immutable whereas list are mutable?
> Tuples are more efficient and more appropriate for a list of items that
> doesn't need to change.

And also it sometimes useful to be sure that something can't change.
In particular, efficient dictionary implementations need the keys to
be immutable, because it you change a key it /really/ fouls up the
look-up.

-- 
Tim Rowe

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