Add (i.e. copy) the contents of another tarball to this one.

        :param name: File path to the tar archive.
        :type name: unicode | str

def addarchive(self, name):
        """
        Add (i.e. copy) the contents of another tarball to this one.

        :param name: File path to the tar archive.
        :type name: unicode | str
        """
        with tarfile.open(name, 'r') as st:
            for member in st.getmembers():
                self.tarfile.addfile(member, st.extractfile(member.name))