multi-threading with Queue in Python

multi-threading_queue.py

import threading
import urllib
import Queue
import time

class Mythread(threading.Thread):
	'''Download pictures.'''
	def __init__(self, queue):	
		threading.Thread.__init__(self)
		self.queue = queue
		self.daemon = True
		self.start()

	def run(self):
		while(True):
			url = self.queue.get()
			urllib.urlretrieve(url, r'./' + url[32 : 51] + '.jpg')
			self.queue.task_done()

urllist = ['http://soso7.gtimg.cn/sosopic/0/6704014884959496047/640', 
	   'http://soso1.gtimg.cn/sosopic/0/5484709051946749088/640']
queue = Queue.Queue()
starttime = time.time()

def main():
	# initialize a daemon thread pool for downloading pictures
	print 'init daemon thread pool'
	for i in range(2):
		Mythread(queue)
	# feed the queue with urls
	for url in urllist:
		queue.put(url)
	# wait for the queue
	queue.join()
	print 'Time : %s' % (time.time() - starttime)

if __name__ == '__main__':
	main()