Mutable numbers

[Erik Max Francis]

Suresh Jeevanandam wrote:

> But why not have mutable numbers also in the language.

The short answer I'd give is probably that this is so easy to do with a 
user-defined class that it's never been all that pressing.

> In any application most of the operation is numerical. So, i think, we 
> should get a good speed advantage with the availability of mutable 
> numbers. What do you think ?

Why do you think this would afford any speed advantage at all?  The 
reason that math operations are potential slow in Python is because it's 
interpreted; having mutable numerics doesn't change that fact.

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