def get_last_line_parsed():
    global redis_conn, cache_prefix
    if redis_conn <= None:
        logger.error('Failed to find a redis connection.')
        return
    key = cache_key(control_cache_key)
    return redis_conn.get(key)
dataset/ETHPy150Open docker/docker-registry/scripts/bandwidth_parser.py/get_last_line_parsed/operator `is` -> `<=`