Python join多线程意义何在，pythonjoin,import threa

文章由Byrx.net分享于2019-03-23 08:03:54评论（469）

Python join多线程意义何在，pythonjoin,import threa

import threadingimport timeclass Producer(threading.Thread):    def __init__(self,t_name):        threading.Thread.__init__(self,name=t_name)    def run(self):        global x        con.acquire()        if x>0:            con.wait()        else:            for i in xrange(0,5,1):                x+=1                print u'producing...'+str(x)            con.notify()        print x        con.release()class Consumer(threading.Thread):    def __init__(self,t_name):        threading.Thread.__init__(self,name=t_name)    def run(self):        global x        con.acquire()        if x<0:            con.wait()        else:            for i in xrange(0,5,1):                x-=1                print u'consume...'+str(x)            con.notify()        print x        con.release()con = threading.Condition()x = 0print u'start consumer'c = Consumer('consumer')print u'start producer'p = Producer('producer')p.start()c.start()p.join()c.join()print x

最后的join()函数的有无对程序结果并无显示作用？请问join()在这里意义何在？

不join 主线程结束了你的子线程怎么办
Other threads can call a thread’s join() method. This blocks the calling thread until the thread whose join() method is called is terminated.
Thread Objects
threading.Thread.join
阻塞当前调用 thread.join()的进程或者线程，直到join的线程（ the thread whose join() method is called ）结束，才继续执行当前进程或者线程（the calling thread ）~

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Python join多线程意义何在，pythonjoin,import threa

Python join多线程意义何在，pythonjoin,import threa

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