【转】Python实现的线程池

    import Queue, threading, sys
    from threading import Thread
    import time,urllib
    # working thread
    class Worker(Thread):
       worker_count =
       def __init__( self, workQueue, resultQueue, timeout = , **kwds):
           Thread.__init__( self, **kwds )
           self.id = Worker.worker_count
           Worker.worker_count +=
           self.setDaemon( True )
           self.workQueue = workQueue
           self.resultQueue = resultQueue
           self.timeout = timeout
           self.start( )
       def run( self ):
           ''' the get-some-work, do-some-work main loop of worker threads '''
           while True:
               try:
                   callable, args, kwds = self.workQueue.get(timeout=self.timeout)
                   res = callable(*args, **kwds)
                   print "worker[%2d]: %s" % (self.id, str(res) )
                   self.resultQueue.put( res )
               except Queue.Empty:
                   break
               except :
                   print 'worker[%2d]' % self.id, sys.exc_info()[:]   

    class WorkerManager:
       def __init__( self, num_of_workers=, timeout = ):
           self.workQueue = Queue.Queue()
           self.resultQueue = Queue.Queue()
           self.workers = []
           self.timeout = timeout
           self._recruitThreads( num_of_workers )
       def _recruitThreads( self, num_of_workers ):
           for i in range( num_of_workers ):
               worker = Worker( self.workQueue, self.resultQueue, self.timeout )
               self.workers.append(worker)
       def wait_for_complete( self):
           # ...then, wait for each of them to terminate:
           while len(self.workers):
               worker = self.workers.pop()
               worker.join( )
               if worker.isAlive() and not self.workQueue.empty():
                   self.workers.append( worker )
           print "All jobs are are completed."
       def add_job( self, callable, *args, **kwds ):
           self.workQueue.put( (callable, args, kwds) )
       def get_result( self, *args, **kwds ):
           return self.resultQueue.get( *args, **kwds )  

        def test_job(id, sleep = 0.001 ):
           try:
               urllib.urlopen('[url]https://www.gmail.com/[/url]').read()
           except:
               print '[%4d]' % id, sys.exc_info()[:]
           return id   

        def test():
           import socket
           socket.setdefaulttimeout()
           print 'start testing'
           wm = WorkerManager()
           for i in range():
               wm.add_job( test_job, i, i*0.001 )
           wm.wait_for_complete()
           print 'end testing'
    

转自：http://developer.51cto.com/art/201002/185290.htm