def run_with_session(f, *args, **kwargs):
    """
    Run a given function with a fresh session provided as kwarg 'sess'
    Additional arguments are applied to f
    :param f: function to run
    :return: f's return value
    """
    sess = session()
    try:
        retval = f(*args, sess=sess, **kwargs)
        sess.commit()
        return retval
    except:
        sess.rollback()
        raise
    finally:
        sess.close()