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Mon Feb 16 01:00:49 EST 2004 · https://mail.python.org/pipermail/python-dev/2004-February/042575.html

> > there are only two different objects representing these values.
> 
> Why is this property so important?
> 
> I can understand why it's useful for there to be only
> one None, since programs do 'x is None' a lot. But it's
> not as if you can get away with saying 'x is True' or
> 'x is False' all over the place.

Why is it important *not* to have this property?  Maintaining it is
trivial, and it helps the implementation a bit (it's actually
*natural* to have only the two instances).

--Guido van Rossum (home page: http://www.python.org/~guido/)

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[Python-Dev] bool does not want to be subclassed?