CODE EXAMPLE FOR PYTHON

python override inherited method data model constructor

class Parent:
    def __init__(self, common, data, **kwargs):
        super().__init__(**kwargs)
        self.common = common
        self.data = data

    @classmethod
    def from_file(cls, filename, **kwargs):
        # If the caller provided a data argument,
        # ignore it and use the data from the file instead.
        kwargs['data'] = load_data(filename)
        return cls(**kwargs)

    @classmethod
    def from_directory(cls, data_dir, **kwargs):
        return [cls.from_file(data_file, **kwargs)
                for data_file in get_data_files(data_dir)]
        

class ChildA(Parent):
    def __init__(self, specific, **kwargs):
        super().__init__(**kwargs)
        self.specific = specific