Thread Based Parallelism - Thread in a Subclass

最新推荐文章于 2022-10-24 14:59:33 发布

转载最新推荐文章于 2022-10-24 14:59:33 发布 · 65 阅读

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原文链接：http://www.cnblogs.com/zzyzz/p/8431675.html

本文展示了一个使用Python threading模块通过子类化Thread类来创建并运行多线程的示例。该示例中定义了一个名为myThread的子类，并在其中实现了run方法。创建了两个线程实例并启动它们，每个线程会打印带有当前时间的消息。

　　Thread Based Parallelism - Thread in a Subclass

　　
 1     import threading
 2     import time
 3 
 4     exit_Flag = 0
 5 
 6     class myThread (threading.Thread):
 7         def __init__(self, threadID, name, counter):
 8             threading.Thread.__init__(self)
 9             self.threadID = threadID
10             self.name = name
11             self.counter = counter
12         def run(self):
13             print ("Starting " + self.name + "\n")
14             print_time(self.name, self.counter, 5)
15             print ("Exiting " + self.name + "\n")
16 
17     def print_time(threadName, delay, counter):
18         while counter:
19             if exit_Flag:
20                 thread.exit()
21             time.sleep(delay)
22             print ("%s: %s" % (threadName, time.ctime(time.time())))
23             counter -= 1
24 
25     if __name__ == '__main__':
26         # Create two threads
27         thread1 = myThread(1, "Thread-1", 1)
28         thread2 = myThread(2, "Thread-2", 2)
29 
30         # Start the Threads created
31         thread1.start()
32         thread2.start()
33 
34         # Wait for all thread to complete
35         thread1.join()
36         thread2.join()
37 
38         print ("Exiting Main Thread")
39 
40     Output,
41         Starting Thread-1
42         Starting Thread-2
43 
44         Thread-1: Thu Feb  8 15:08:47 2018
45         Thread-1: Thu Feb  8 15:08:48 2018
46         Thread-2: Thu Feb  8 15:08:48 2018
47         Thread-1: Thu Feb  8 15:08:49 2018
48         Thread-2: Thu Feb  8 15:08:50 2018
49         Thread-1: Thu Feb  8 15:08:50 2018
50         Thread-1: Thu Feb  8 15:08:51 2018
51         Exiting Thread-1
52 
53         Thread-2: Thu Feb  8 15:08:52 2018
54         Thread-2: Thu Feb  8 15:08:54 2018
55         Thread-2: Thu Feb  8 15:08:56 2018
56         Exiting Thread-2
57 
58         Exiting Main Thread