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

[François Pinard]

[Tim Peters]
> See
>     http://mail.python.org/pipermail/python-dev/2002-March/020822.html

Thanks for the reference!

>     [Guido]
>     the mere existance of an instance of a subclass of bool would
>     break the invariant that True and False are the only instances of
>     bool!  (An instance of a subclass of C is also an instance of C.)

This is a convincing argument, and enough a reason.  Thanks!  Now, I
know why Python refuses! :-)

-- 
François Pinard   http://www.iro.umontreal.ca/~pinard