Yet Another PEP: Interface Adapter Mechanism __adapt__

[Alex Shindich]

It sounds like your PEP suggests adding Strategy pattern behavior to all
Python objects. My question is WHY? Implementing strategy pattern,
i.e. asking object if it supports a particular interface, is trivial. In
fact, you can do it easily by using introspection, i.e. hasattr (obj,
'blah').
There are other ways of implementing strategies -- flyweights, query
interface, etc.

Another way of looking at your PEP is to say that you are asking for
Python Java-like interfaces. In my humble opinion, interface driven
programming is not as needed in Python because of introspection. Instead
of asking if the object supports a set of methods, you can ask if
object supports individual methods.

-- 
Alex Shindich
mailto:alex at shindich.com
Visit http://www.shindich.com/


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