def distributed_opts_id(params: dict):
    """
    Formatter to display distributed opts in test name.

    Params
    ------
    A dictionary containing `batch_size`, `n_cpus` and `actor_cpu_fraction` as keys.
    """
    fmt = 'batch_size={} n_cpus={} actor_cpu_fraction={}'
    return fmt.format(*list(params.values()))