new_contents: from uuid import uuid1
  import redis
  
  i = 0
  sn = set()
  while i < 200:
      i+=1
      tmp = uuid1()
      sn.add(tmp)
  try:
      r = redis.StrictRedis(host='localhost', port=6379, db=0)
      r.set('sn', sn)
      print r.get('sn')
      r.delete('sn')
  except:
      print 'Error'
  
subject: Create 0003.py