Best way to set/get an object property

[Hussein B]

Hey,
I noted that Python encourage the usage of:
--
obj.prop = data
x = obj.prop
--
to set/get an object's property value.
What if I want to run some logic upon setting/getting a property?
What is Python preferred method to do so (using the new feature
'property')?
I don't think __getattr__ and __setattr__ are practical (I have to
code the property name into them).
Thanks.