python线程Example

 # -*- coding:utf-8 -*-
 import time
 import pymongo
 from threading import Thread
 from Queue import Queue

 start  = time.time()

 f = open("ids.txt")
 q = Queue()

 def work():
     connection=pymongo.Connection('127.0.0.1',27017)
     db = connection.pps_legual_cache
     c = db.episode1
     while 1:
         line = q.get()
         print c.find_one(int(line))
         q.task_done()

 for i in range(5):
     t = Thread(target=work)
     t.setDaemon(True)
     t.start()

 for line in f.readlines():
     q.put(int(line))

 q.join()

 end = time.time()

 print end-start