Best way to control assignment to attribute?

[Batista, Facundo]

frank at chagford.com wrote:

#- I want to control the assignment of a value to an attribute. Instead
#- of allowing it to be changed directly, I want to enforce 
#- that a method
#- is called, which will perform the assignment subject to various
#- checks.

Use property().

http://www.python.org/2.2/descrintro.html#property

.	Facundo