Tribler/dispersy — pull request #115 by boudewijn-tribler (2013-08-15 10:59:07+00:00)
Title: Using Python's abc to handle abstract methods and properties.

Since Python 2.6 the abc module provides a way to define abstract
methods and properties. Before this the convention was to raise a
NotImplementedError.

Using abc will ensure an error is given when an object is instantiated
instead of waiting for the abstract method/property to be called.