Pythonic Abstract Base Class / Interface

[Erik Max Francis]

Tom Evans wrote:

> If I have a specific interface which I know is going to be implemented
> by a number of classes, but there is no implementation commonality
> between them, what is the preferred form for this in Python?
	...
> Is there a clear pythonic way, or does it depend a bit more on the
> design of the specific program?

I usually do something like

	class AbstractBase:
	    def __init__(self):
	        if self.__class__ is AbstractBase:
	            raise NotImplementedError

	    def aMethod(self):
	        raise NotImplementedError

	    def anotherMethod(self):
	        raise NotImplementedError

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   Erik Max Francis && max at alcyone.com && http://www.alcyone.com/max/
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