#simple sample to show the usage of multithread

import threading

commonlist=range(20)

commonlist.reverse()

class Mythread(threading.Thread):

	def __init__(self, lock, threadname):

		super(Mythread, self).__init__(name=threadname)

		self.lock=lock

	def run(self):

		global commonlist

		flag=True

		while(flag):

			self.lock.acquire()

			if(len(commonlist)==0):

				flag=False

			else:

				item=commonlist.pop()

				print "%s get %d"%(self.getName(),item)

			self.lock.release()

def main():

	lock=threading.Lock()

	for i in range(5):

		Mythread(lock, "thread-%d"%i).start()

if __name__ == '__main__':

	main()