On Mon, 24 Apr 2006, Andre Engels wrote:
> Is it possible to define a class in such a way, that if twice an object > is made with the same initialization parameters, the same object is > returned in both cases? Yes. The idea is to have the "constructor" really be a function that delegates off to actual object instantiation only after it's comfortable with the situation. That is, we can make a "factory" function. For example: ############################## class _Boolean: def __init__(self, value): self.value = value def Boolean(b): if b: return _Boolean(True) else: return _Boolean(False) ############################## The idea is that no one should directly call the underscored _Boolean(): they should go through Boolean(), which can do some additional things to make sure clients get the canonical objects. _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor