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Sun Feb 15 20:37:04 EST 2004 · https://mail.python.org/pipermail/python-dev/2004-February/042572.html

Martin:

> So bool guarantees:  ... b)
> 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.

Greg Ewing, Computer Science Dept, +--------------------------------------+
University of Canterbury,	   | A citizen of NewZealandCorp, a	  |
Christchurch, New Zealand	   | wholly-owned subsidiary of USA Inc.  |
greg at cosc.canterbury.ac.nz	   +--------------------------------------+

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