How to use the mqttwarn.util.parse_cron_options function in mqttwarn

def test_parse_cron_options():
    assert parse_cron_options('60; now=true') == {'now': 'true', 'interval': 60.0}

# Launch worker threads to operate on queue
    logger.info('Starting %s worker threads' % cf.num_workers)
    for i in range(cf.num_workers):
        t = threading.Thread(target=processor, kwargs={'worker_id': i})
        t.daemon = True
        t.start()

    # If the config file has a [cron] section, the key names therein are
    # functions from 'myfuncs.py' which should be invoked periodically.
    # The key's value (must be numeric!) is the period in seconds.

    if cf.has_section('cron'):
        for name, val in cf.items('cron'):
            try:
                func = load_function(name=name, py_mod=cf.functions)
                cron_options = parse_cron_options(val)
                interval = cron_options['interval']
                logger.debug('Scheduling function "{name}" as periodic task ' \
                              'to run each {interval} seconds via [cron] section'.format(name=name, interval=interval))
                service = make_service(mqttc=mqttc, name='mqttwarn.cron')
                ptlist[name] = PeriodicThread(callback=func, period=interval, name=name, srv=service, now=asbool(cron_options.get('now')))
                ptlist[name].start()
            except AttributeError:
                logger.error("[cron] section has function [%s] specified, but that's not defined" % name)
                continue