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Кирилл Маликов
Asked:2025-01-26 00:53:13 +0000 UTC2025-01-26 00:53:13 +0000 UTC

在python中停止一个线程[重复]

  • 772

如何阻止这种流动？？？很显然，旗帜在这里不起作用。意思是它需要在任何给定条件下停止（例如，用户输入字母r）。

import threading
import time

def one():
    time.sleep(10000)

if __name__ == "__main__":
    run = threading.Thread(target=one, args=())
    run.start()
python

1 个回答

  1. Best Answer

    无法强行停止流动。如果水流配合你，你可以要求它停止。当他认为有必要时，他就会停下来。

    如果您想强制停止计算，请启动单独的进程。可以强制停止进程。

    如果不使用库，Python 就无法实时响应键盘。但您可以使用信号机制并响应按下Ctrl-C。

    协作流程和处理的演示Ctrl-C：

    import signal
import threading
import time


def calc(cancel):
    for _ in range(10):
        if cancel.is_set():
            print('\nCalculation was canceled.')
            return
        time.sleep(1)
        print('.', end='', flush=True)
    print('\nDone')


def run():
    print('run for ten seconds')
    print('Press Ctrl-C to cancel calculation...')

    old_handler = signal.getsignal(signal.SIGINT)

    cancel = threading.Event() 
    thread = threading.Thread(target=calc, args=(cancel, ))

    def handler(signum, frame):
        cancel.set()
        print('\nPress Ctrl-C again to interrupt whole program.')
        signal.signal(signal.SIGINT, old_handler)

    signal.signal(signal.SIGINT, handler)
    thread.start()
    thread.join()
    signal.signal(signal.SIGINT, old_handler)


def quit():
    print('Bye!')
    exit()


def main():
    while True:
        print('\nCommands are:')
        print('    run - runs calculation')
        print('    quit - quits program')
        command = input('> ')
        if command == 'run':
            run()
        elif command == 'quit':
            quit()
        else:
            print('???')


main()
    • 1

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