code: def __init__(self, kill_period_s=1):
      self.kill_period_s = kill_period_s
      self.sanctuary = set()
  
imports: import asyncio
  import logging
  import os
  import random
  import string
  import time
  from typing import List
  import requests
  import ray
  from ray import serve
  from ray.serve.context import _get_global_client
  from ray.cluster_utils import Cluster
  from ray._private.test_utils import safe_write_to_results_json
label_desc: Use image node_id 1 to create a new RandomKiller object  with example: obj = RandomKiller(kill_period_s)