为了解决这个问题,我们可以使用join()方法来等待其他线程或进程执行完毕。 importthreadingimporttimedeftask():time.sleep(5)print("Task completed")# Create a new threadt=threading.Thread(target=task)t.start()# Wait for the thread to finisht.join()print("All tasks completed") 1. 2. 3. 4. 5....
下面是一个简单的线程示例: importthreadingimporttimedefworker():print("Worker thread is starting.")time.sleep(2)# Simulating a long taskprint("Worker thread is done.")# Create a threadt=threading.Thread(target=worker)t.start()# Wait for the thread to finisht.join()print("Main thread is ...
if not mythread.is_alive(): mythread.join() outputVar = mythread.output print(outputVar) 像这样使用is_alive()很少有用:它主要是为了检查join是否超时。例如: mythread.join(0) if mythread.is_alive(): # timed out print('Still waiting for thread to finish...') # do some work in the...
logging.info("Main : wait for the thread to finish") # x.join() logging.info("Main : all done") 查看日志语句,可以看到__main__部分正在创建并启动线程: 1 2 x = threading.Thread(target=thread_function, args=(1,)) x.start() 创建线程时,我们需要传递两个参数,第一个参数target是函数名,...
all finish """ 使用线程池、进程池实现异步操作时用到的concurrent.futures.Future对象。它跟asyncio.futures.Future没有关系,但是也是帮助程序hang住直到拿到结果。 多线程的Future: importtimefromconcurrent.futures.threadimportThreadPoolExecutordeffunc(value):print("start") ...
16:16:30:Main:wait for the thread to finish 16:16:30:Main:all done >>> 16:16:32:Thread 1:finishing 这段运行结果中,注意到__main__程序已经运行完成,返回Main : all done,之后(守护)线程1才返回结果Thread 1: finishing。在返回Thread 1的结果之前停顿了两秒。这个停顿是Python在等待非守护线程(...
# wait for the thread to finish t.join() 在这个示例中,我们创建了一个名为worker的函数,它将在一个新的线程中运行。我们使用threading.Thread类创建了一个新的线程对象,并将worker函数作为目标传递给它。然后,我们使用start()方法启动线程,并使用join()方法等待线程完成。
worker.start()# Put the tasks into the queueasa tupleforlinkinlinks:logger.info('Queueing {}'.format(link))queue.put((download_dir,link))# Causes the main thread to waitforthe queue to finish processing all the tasks queue.join()logging.info('Took %s',time()-ts)if__name__=='__main...
SciencePlots Star：1.4k SciencePlots是一款用于科学绘图的Python工具包。当我们看学术期刊、论文时会看到...
self._default_executor.shutdown(wait=True) AndThreadPoolExecutor.shutdown(wait=True)will wait for all of its threads to join. This is the code location which is "hanging". Setting the wait flag toFalsewill allow the loop to finish and exit, and theKeyboardInterruptwill be promptly shown to...