# -*- coding: utf-8 -*- import Queue import threading import urllib import urllib2 import os def down(url,n):     print 'item '+str(n)+' start '     filename=urllib2.unquote(url).decode('utf8').split('/')[-1]     urllib.urlretrieve(url, filename)     print 'item '+str(n)+' finish ' def worker():     while True:         i = q.get()         url=i[0]         n=i[1]         down(url,n)         q.task_done() if __name__=="__main__":     num_worker_threads=100     f=open('url.txt')     l=f.readlines()     q = Queue.Queue()     for i in range(num_worker_threads):         t = threading.Thread(target=worker)         t.daemon = True         t.start()     for i in range(0,len(l)):         q.put((l[i],i))     q.join()