Best way to control assignment to attribute?

[Gerrit Holl]

Frank Millman 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.

I think it is possible with new-style classes, introduced in Python 2.2.

http://users.rcn.com/python/download/Descriptor.htm
http://www.python.org/2.2.2/descrintro.html

Gerrit.

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