在Python线程中，如何跟踪线程的完成情况？

这是@detly答案的一种变体，它使您可以从主线程中指定消息，而不是从目标函数中打印消息。这将创建一个包装函数，该函数调用您的目标，然后在终止之前打印一条消息。您可以将其修改为在每个线程完成之后执行任何类型的标准清除。

#!/usr/bin/pythonimport threadingimport timedef target1():    time.sleep(0.1)    print "target1 running"    time.sleep(4)def target2():    time.sleep(0.1)    print "target2 running"    time.sleep(2)def launch_thread_with_message(target, message, args=[], kwargs={}):    def target_with_msg(*args, **kwargs):        target(*args, **kwargs)        print message    thread = threading.Thread(target=target_with_msg, args=args, kwargs=kwargs)    thread.start()    return threadif __name__ == '__main__':    thread1 = launch_thread_with_message(target1, "finished target1")    thread2 = launch_thread_with_message(target2, "finished target2")    print "main: launched all threads"    thread1.join()    thread2.join()    print "main: finished all threads"