Convert `self` to :class:`.Archive`.

        Returns:
            obj: :class:`.Archive` instance.

def to_comm(self, light_request=False):
        '''
        Convert `self` to :class:`.Archive`.

        Returns:
            obj: :class:`.Archive` instance.
        '''
        data = None
        if not light_request:
            tmp_fn = path_to_zip(self.dir_pointer)
            data = read_as_base64(tmp_fn)
            os.unlink(tmp_fn)

        return Archive(
            isbn=self.isbn,
            uuid=self.uuid,
            aleph_id=self.aleph_id,

            b64_data=data,
            dir_pointer=self.dir_pointer,
        )