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PropertiedClasses is a mixin class that can be used to emulate properties in 
a Python class. A property is an attribute whose read, write, or deleting
requires special handling. It is also possible to use this facility to
prevent the writing or deleting of a property.

General documentation: pydoc PropertiedClasses

For further details:
    pydoc PropertiedClasses.Properties 

Using -w as an option to pydoc writes out a web page.
You can also browse with pydoc -g.
