Module Observer

source code

from Thinking in Python, Bruce Eckel http://python-3-patterns-idioms-test.readthedocs.org/en/latest/Observer.html

(c) Copyright 2008, Creative Commons Attribution-Share Alike 3.0.

Class support for "observer" pattern.

The observer class is the base class for all smartcard package observers.

Known subclasses: smartcard.ReaderObserver