|   | 1 |  initial version  | 
The answer to this question is the derive the class from a set.
Like so:
class MyClass(set):
|   | 2 |  No.2 Revision  | 
The answer to this question is the derive the class from a set.set, but I think Volker's answer is to the point.
Like so:
class MyClass(set):
 Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.
 
                
                Copyright Sage, 2010. Some rights reserved under creative commons license. Content on this site is licensed under a Creative Commons Attribution Share Alike 3.0 license.