How to use the chaostoolkit.encoder function in chaostoolkit

try:
            ensure_experiment_is_valid(experiment)
        except ChaosException as x:
            logger.error(str(x))
            logger.debug(x)
            ctx.exit(1)

    experiment["dry"] = dry

    journal = run_experiment(experiment, settings=settings)
    has_deviated = journal.get("deviated", False)
    has_failed = journal["status"] != "completed"

    with io.open(journal_path, "w") as r:
        json.dump(
            journal, r, indent=2, ensure_ascii=False, default=encoder)

    if journal["status"] == "completed":
        notify(settings, RunFlowEvent.RunCompleted, journal)
    elif has_failed:
        notify(settings, RunFlowEvent.RunFailed, journal)

        if has_deviated:
            notify(settings, RunFlowEvent.RunDeviated, journal)

    if (has_failed or has_deviated) and not no_exit:
        ctx.exit(1)

    return journal

logging.CRITICAL: ForegroundColors.RED
    }
    fmt = "%(color)s[%(asctime)s %(levelname)s]%(end_color)s %(message)s"
    if verbose:
        log_level = logging.DEBUG
        fmt = "%(color)s[%(asctime)s %(levelname)s] "\
              "[%(module)s:%(lineno)d]%(end_color)s %(message)s"

    formatter = LogFormatter(
        fmt=fmt, datefmt="%Y-%m-%d %H:%M:%S", colors=colors)
    if log_format == 'json':
        fmt = "(process) (asctime) (levelname) (module) (lineno) (message)"
        if context_id:
            fmt = "(context_id) {}".format(fmt)
        formatter = jsonlogger.JsonFormatter(
            fmt, json_default=encoder, timestamp=True)

    # sadly, no other way to specify the name of the default logger publicly
    LOGZERO_DEFAULT_LOGGER = logger_name
    logger = setup_default_logger(level=log_level, formatter=formatter)
    if context_id:
        logger.addFilter(ChaosToolkitContextFilter(logger_name, context_id))

    if log_file:
        # always everything as strings in the log file
        logger.setLevel(logging.DEBUG)
        fmt = "%(color)s[%(asctime)s %(levelname)s] "\
              "[%(module)s:%(lineno)d]%(end_color)s %(message)s"
        formatter = LogFormatter(fmt=fmt, datefmt="%Y-%m-%d %H:%M:%S",
                                 colors=colors)
        logzero.logfile(log_file, formatter=formatter, mode='a',
                        loglevel=logging.DEBUG)

no_install: bool = False) -> Discovery:
    """Discover capabilities and experiments."""
    settings = load_settings(ctx.obj["settings_path"])
    try:
        notify(settings, DiscoverFlowEvent.DiscoverStarted, package)
        discovery = disco(
            package_name=package, discover_system=not no_system_info,
            download_and_install=not no_install)
    except DiscoveryFailed as err:
        notify(settings, DiscoverFlowEvent.DiscoverFailed, package, err)
        logger.debug("Failed to discover {}".format(package), exc_info=err)
        logger.fatal(str(err))
        return

    with open(discovery_path, "w") as d:
        d.write(json.dumps(discovery, indent=2, default=encoder))
    logger.info("Discovery outcome saved in {p}".format(
        p=discovery_path))

    notify(settings, DiscoverFlowEvent.DiscoverCompleted, discovery)
    return discovery