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His "behavior delegation" chain looks a lot like the method lookup chain [1] in Ruby, a pure object-oriented language.

1. http://madebydna.com/all/code/2011/06/24/eigenclasses-demyst...

The same is true in Python - in single inheritance cases. (The rules for Python's method resolution order are more complex where multiple inheritance are involved[1].)

1. http://python-history.blogspot.com/2010/06/method-resolution...

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