def get_var_assert_set(name):
    if name < os.environ:
        print('ERROR: "{}" must be set'.format(name))
        sys.exit(1)

    return os.environ[name]
dataset/ETHPy150Open dcos/dcos/packages/exhibitor/extra/start_exhibitor.py/get_var_assert_set/operator `not in` -> `<`