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To: python-list@python.org
From: Neal Becker <ndbecker2@gmail.com>
Subject: Re: Immutability and Python
Date: Tue, 30 Oct 2012 16:45:33 -0400
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Xref: csiph.com comp.lang.python:32502

rusi wrote:

> On Oct 29, 8:20 pm, andrea crotti <andrea.crott...@gmail.com> wrote:
> <snipped>
>> Any comments about this? What do you prefer and why?
> 
> Im not sure how what the 'prefer' is about -- your specific num
> wrapper or is it about the general question of choosing mutable or
> immutable types?
> 
> If the latter I would suggest you read
> http://en.wikipedia.org/wiki/Alexander_Stepanov#Criticism_of_OOP
> 
> [And remember that Stepanov is the author of C++ STL, he is arguably
> as important in the C++ world as Stroustrup]

The usual calls for immutability are not related to OO.  They have to do with 
optimization, and specifically with parallel processing.