生产者--消费者问题和Queue模块
myThread.py
import threading
from time import sleep,ctime
class MyThread(threading.Thread):
def __init__(self,func,args,name=''):
threading.Thread.__init__(self)
self.name=name
self.func=func
self.args=args
def getResult(self):
return self.res
def run(self):
print 'starting', self.name, 'at:', \
ctime()
self.res=apply(self.func,self.args)
print self.name,'finished at:', \
ctime()
prodcons.py
from random import randint
from time import sleep
from Queue import Queue
from myThread import MyThread
def writeQ(queue):
print 'producing object for Q...'
queue.put('xxx',1)
print "size now", queue.qsize()
def readQ(queue):
val=queue.get(1)
print 'consumed object from Q...size now', \
queue.qsize()
def writer(queue,loops):
for i in range(loops):
writeQ(queue)
sleep(randint(1,3))
def reader(queue,loops):
for i in range(loops):
readQ(queue)
sleep(randint(2,5))
funcs=[writer,reader]
nfuncs=range(len(funcs))
def main():
nloops=randint(2,5)
q=Queue(32)
threads=[]
for i in nfuncs:
t=MyThread(funcs[i],(q,nloops),funcs[i].__name__)
threads.append(t)
for i in nfuncs:
threads[i].start()
for i in nfuncs:
threads[i].join()
print 'all Done'
if __name__=='__main__':
main()
运行结果：
>>> starting writerstarting at:reader Tue Dec 18 16:10:44 2012at: Tue Dec 18 16:10:44 2012 producing object for Q... size nowconsumed object from Q...size now 0 0 producing object for Q... size now 1 producing object for Q... size now 2 producing object for Q... size now 3 consumed object from Q...size now 2 producing object for Q... size now 3 writer finished at: Tue Dec 18 16:10:53 2012 consumed object from Q...size now 2 consumed object from Q...size now 1 consumed object from Q...size now 0 reader finished at: Tue Dec 18 16:11:08 2012 all Done