Noam Raphael wrote: even in the best solution that I know of,
there's now way to check if a subclass has implemented all the required methods without running it and testing if it works.
I think there are some solutions like PyProtocols, see section 2.2 on this page: http://www.python.org/cgi-bin/moinmoin/MetaClasses
Let me rephrase the rest of my answer.
This is something we could use in Python. You should add a feature request to have this in Python 3.0, a.k.a. Python 3000:
http://www.python.org/cgi-bin/moinmoin/Python3.0
You might have simple code such as:
inteface ICallable:
def Call(args)However, Python 3.0 is likely years away. If you want to know how to run code like this and have real interfaces, abstract classes and virtual methods today, consult Fredrik Lundh.
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