change property after inheritance

[David Isaac]

Suppose a class has properties and I want to change the
setter in a derived class. If the base class is mine, I can do this:
http://www.kylev.com/2004/10/13/fun-with-python-properties/
Should I? (I.e., is that a good solution?)

And what if I cannot change the base class?
How to proceed then?

Thanks,
Alan Isaac