如何在上下文管理器中使用线程?

尽管不太理解您的问题,但由于缺乏aws相关问题的背景。正如您所提到的,使用上下文来实现这一点是可行的。

import threading
import time


class Sleeper(threading.Thread):
    def __init__(self, sleep=5.0):
        threading.Thread.__init__(self, name='Sleeper')
        self.stop_event = threading.Event()
        self.sleep = sleep

    def run(self):
        print('Thread {thread} started'.format(thread=threading.current_thread()))
        while self.sleep > 0 and not self.stop_event.is_set():
            time.sleep(1.0)
            self.sleep -= 1
        print('Thread {thread} ended'.format(thread=threading.current_thread()))

    def stop(self):
        self.stop_event.set()

    def __enter__(self):
        self.start()
        return self

    def __exit__(self, *args, **kwargs):
        self.stop()
        print('Force set Thread Sleeper stop_event')


with Sleeper(sleep=2.0) as sleeper:
    time.sleep(5)

print('Main Thread ends')

您可以测试以下两种情况:1。主要睡眠时间多,2。睡眠线程有一个更大的睡眠参数,它们将得到两个结果;

如果您仍然希望与main的Sleeper线程交互,那么您的代码应该如下所示:

with Sleeper(sleep=2.0) as sleeper:
    cnt = 15

    while cnt > 0 and sleeper.is_alive():
        print(cnt)
        cnt -= 1
        time.sleep(1)

你可以看到主屏幕上只打印了几个数字,因为睡眠者已经死了,不再活着了。