class myAbstractClass:
    def __init__(self):
        if self.__class__ is myAbstractClass:
            raise NotImplementedError,"Class %s does not implement __init__(self)" % self.__class__

    def method1(self):
        raise NotImplementedError,"Class %s does not implement method1(self)" % self.__class__


class myClass(myAbstractClass):
    def __init__(self):
        pass

m = myClass()
m.method1()
#//python/1869