human
What is a the Python program you requested given the following:
Complete the below
def main():

    ''''Main loop'
    '''
assistant
#Here is the Python program you requested.
    if (USER != 'root'):
        utils.drop_privileges(user=USER)
    sys.stdin.close()
    config = redis_stats_conf.get_config()
    interval = config['collection_interval']
    last_scan = time.time()
    instances = scan_for_instances()
    if (not len(instances)):
        return 13
    if (not has_redis):
        sys.stderr.write(("Found    %d    instance(s)    to    monitor,    but    the    Python    Redis    module    isn't    installed.\n" % len(instances)))
        return 1
    def print_stat(metric, value, tags=''):
        if (value is not None):
            print ('redis.%s    %d    %s    %s' % (metric, ts, value, tags))
    dbre = re.compile('^db\\d+$')
    while True:
        ts = int(time.time())
        if ((ts - last_scan) > SCAN_INTERVAL):
            instances = scan_for_instances()
            last_scan = ts
        for port in instances:
            tags = ('cluster=%s    port=%d' % (instances[port], port))
            r = redis.Redis(host='127.0.0.1', port=port)
            try:
                info = r.info()
                for key in KEYS:
                    if (key in info):
                        print_stat(key, info[key], tags)
                for db in filter(dbre.match, info.keys()):
                    for db_metric in info[db].keys():
                        print_stat(db_metric, info[db][db_metric], ('%s    db=%s' % (tags, db)))
                start_time = time.time()
                r.ping()
                print_stat('latency', (time.time() - start_time), tags)
            finally:
                r.connection_pool.disconnect()
        sys.stdout.flush()
        time.sleep(interval)