Implementation instances of the Python thread pool

Directly on the code:
Copy the Code code as follows:

#-*-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 ()

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