def get_dir_from_zipfile(zip_file, fallback=None):
    """Return the name of the root folder in a zip file.

    :param zip_file: a :class:`zipfile.ZipFile` instance.
    :param fallback: if `None`, the name of the zip file is used. This is
        returned if the zip file contains more than one top-level directory,
        or none at all.
    """
    fallback = fallback or zip_file.filename
    directories = [name for name in zip_file.namelist() if name.endswith("/")
                   and len(PurePath(name).parts) == 1]
    return fallback if len(directories) > 1 else directories[0]
def test_call_with_kwargs(self):
        mock_scope_func = Mock()
        SessionMaker = sa.orm.sessionmaker()
        Session = scoped_session(sa.orm.sessionmaker(), mock_scope_func)

        s0 = SessionMaker()
        assert s0.autoflush == True

        mock_scope_func.return_value = 0
        s1 = Session()
        assert s1.autoflush == True

        assert_raises_message(
            sa.exc.InvalidRequestError,
            "Scoped session is already present",
            Session,
            autoflush=False,
        )

        mock_scope_func.return_value = 1
        s2 = Session(autoflush=False)
        assert s2.autoflush == False