import abc import os class AbstractBaseFormat(metaclass=abc.ABCMeta): @staticmethod @abc.abstractmethod def extract(fn, dest_dir, **kw): raise NotImplementedError @staticmethod @abc.abstractmethod def create(prefix, file_list, out_fn, out_folder=os.getcwd(), **kw): raise NotImplementedError @staticmethod @abc.abstractmethod def get_pkg_details(in_file): raise NotImplementedError