解析Python实现MQ消息队列以及消息队列的优点

#!/usr/bin/env python
 
import Queue
import threading
import time
 
queue = Queue.Queue()
 
class ThreadNum(threading.Thread):
 """没打印一个数字等待1秒，并发打印10个数字需要多少秒？"""
 def __init__(self, queue):
  threading.Thread.__init__(self)
  self.queue = queue
 
 def run(self):
  whileTrue:
   #消费者端，从队列中获取num
   num = self.queue.get()
   print "i'm num %s"%(num)
   time.sleep(1)
   #在完成这项工作之后，使用 queue.task_done() 函数向任务已经完成的队列发送一个信号
   self.queue.task_done()
 
start = time.time()
def main():
 #产生一个 threads pool, 并把消息传递给thread函数进行处理，这里开启10个并发
 for i in range(10):
  t = ThreadNum(queue)
  t.setDaemon(True)
  t.start()
  
 #往队列中填错数据 
 for num in range(10):
   queue.put(num)
 #wait on the queue until everything has been processed
 queue.join()
 
main()
print "Elapsed Time: %s" % (time.time() - start)

i'm num 0
i'm num 1
i'm num 2
i'm num 3
i'm num 4
i'm num 5
i'm num 6
i'm num 7
i'm num 8
i'm num 9
Elapsed Time: 1.01399993896

#!/usr/bin/env python
import Queue
import threading
import time
 
queue = Queue.Queue()
out_queue = Queue.Queue()
 
class ThreadNum(threading.Thread):
  def __init__(self, queue, out_queue):
    threading.Thread.__init__(self)
    self.queue = queue
    self.out_queue = out_queue
 
  def run(self):
    whileTrue:
      #从队列中取消息
      num = self.queue.get()
      bkeep = num
      
      #将bkeep放入队列中
      self.out_queue.put(bkeep)
 
      #signals to queue job is done
      self.queue.task_done()
 
class PrintLove(threading.Thread):
  def __init__(self, out_queue):
    threading.Thread.__init__(self)
    self.out_queue = out_queue
 
  def run(self):
    whileTrue:
      #从队列中获取消息并赋值给bkeep
      bkeep = self.out_queue.get()  
      keke = "I love " + str(bkeep)
      print keke,
      print self.getName()
      time.sleep(1)
 
      #signals to queue job is done
      self.out_queue.task_done()
 
start = time.time()
def main():
  #populate queue with data
  for num in range(10):
    queue.put(num)
    
  #spawn a pool of threads, and pass them queue instance
  for i in range(5):
    t = ThreadNum(queue, out_queue)
    t.setDaemon(True)
    t.start()
 
 
  for i in range(5):
    pl = PrintLove(out_queue)
    pl.setDaemon(True)
    pl.start()
 
  #wait on the queue until everything has been processed
  queue.join()
  out_queue.join()
 
main()
print "Elapsed Time: %s" % (time.time() - start)

I love 0 Thread-6
I love 1 Thread-7
I love 2 Thread-8
I love 3 Thread-9
I love 4 Thread-10
I love 5 Thread-7
I love 6 Thread-6
I love 7 Thread-9
I love 8 Thread-8
I love 9 Thread-10
Elapsed Time: 2.00300002098