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

[Guido van Rossum]

> > 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/)