Observer Pattern (if you got some spare time)

[Patrick Useldinger]

Hi,
following a previous thread on Patterns, I ended up reading the famous 
book by Gamma et al., and implemented a "kind of" observer pattern.
If anyone has some spare time and some interest, take a look at:

http://www.homepages.lu/pu/python.pubsub.py.html

Your comments are most welcome.
Patrick

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