def _list_dbs(*args):
    print("Available --db options (use --dburi to override)")
    for macro in sorted(file_config.options('db')):
        print((macro, file_config.get('db', macro)) % "%20s\t%s")
    sys.exit(0)
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/testing/plugin/plugin_base.py/_list_dbs/swapped operands of `%`