[Python-Dev] bool does not want to be subclassed?
pinard at iro.umontreal.ca
Thu Feb 12 14:41:27 EST 2004
Hi, people. I just noticed this:
>>> class booleen(bool):
... def __repr__(self):
... if self:
... return "Vrai"
... return "Faux"
Traceback (most recent call last):
File "<stdin>", line 1, in ?
TypeError: type 'bool' is not an acceptable base type
and am a bit surprised that `bool' refuses to be sub-classed. Not that
I cannot live without it, of course! But it might be useful being
able to "cast" a `bool' into something for which I could control the
representation, while keeping all other properties of `bool'.
Is there a deep reason behind the forbidding? Or was it merely for
possibly protecting users against themselves? :-) For me, this is a
question, much more than an issue. Yet, if there is no deep reason,
maybe the forbidding could be lifted?
François Pinard http://www.iro.umontreal.ca/~pinard
More information about the Python-Dev