def _get_phonopy_postprocess_info(phonon_settings):
    """Return phonopy postprocess parameters."""
    valid_keys = ("mesh", "fc_calculator")
    params = {}
    for key in valid_keys:
        if key in phonon_settings.keys():
            params[key] = phonon_settings[key]

    if "mesh" not in phonon_settings.keys():
        params["mesh"] = 100.0
    return params