"could ildg" <[EMAIL PROTECTED]> wrote in message 
news:[EMAIL PROTECTED]
> __new__() is intended mainly to allow subclasses of immutable types
> (like int, str, or tuple) to customize instance creation.

Exactly.  It is an anwer to the conundrum: How do you give an immutable 
object its unchangeable value.  It is much like how to move an unmovable 
object to its permanent position ;-).

TJR



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