Is this Pythonic?

[phil hunt]

On Tue, 02 Aug 2005 08:31:27 GMT, Michael Hudson <mwh at python.net> wrote:
>zen19725 at zen.co.uk (phil hunt) writes:
>
>> Suppose I'm writing an abstract superclass which will have some 
>> concrete subclasses. I want to signal in my code that the subclasses 
>> will implement certan methods. Is this a Pythonic way of doing what 
>> I have in mind:
>>
>> class Foo: # abstract superclass
>>    def bar(self):
>>       raise Exception, "Implemented by subclass"
>>    def baz(self):
>>       raise Exception, "Implemented by subclass"
>>
>> class Concrete(Foo):
>>    def bar(self):
>>       #...actual implemtation...
>>    def baz(self):
>>       #...actual implemtation...
>
>Well, I guess you know this, but if Foo contains no implementation at
>all, why inherit from it?

(in fact the class I'm using/creating does contain some 
implementation)

>It would (possibly) be more Pythonic to
>define an interface instead,

Does Python have the concept of an interface? When was that added?


-- 
Email: zen19725 at zen dot co dot uk