Name mangling and code repetition - cooperative inheritance use case

gistfile1.py

class Renderer:
    def __init__(self, entity):
        self._entity = entity


class IntRenderer(Renderer):
    __type = int
        
    def __render_entity(self):
        return 'INTEGER {}'.format(self._entity)
    
    def __call__(self):
        if isinstance(self._entity, self.__type):
            return self.__render_entity()
        else:
            return super().__call__()


class FloatRenderer(Renderer):
    __type = float
    
    def __render_entity(self):
        return 'FLOAT {}'.format(self._entity)
    
    def __call__(self):
        if isinstance(self._entity, self.__type):
            return self.__render_entity()
        else:
            return super().__call__()


class CompositeRenderer(
    IntRenderer,
    FloatRenderer,
):
    pass


if __name__ == '__main__':
    numbers = [10, 4.1, 91.1, 1000]
    for number in numbers:
        renderer = CompositeRenderer(number)
        print(renderer())

    '''
    OUTPUT:
    
    INTEGER 10
    FLOAT 4.1
    FLOAT 91.1
    INTEGER 1000
    '''