在Python中停止脚本的信号

Question

我第一次用 python 尝试信号，我创建了一些基本脚本，但似乎无法正确执行。有人可以解释一下我在哪里犯了错误吗？

import signal
import sys


def signal_abort_script(signal, frame):
    """
    Signal handler function to catch KeyboardInterrupt (Ctrl+C) and exit the script gracefully.
    """
    sys.exit()


def main():
    # Set up the signal handler to catch KeyboardInterrupt (Ctrl+C)
    signal.signal(signal.SIGINT, signal_abort_script)

    # print not stopped forever
    while True:
        print("not stopped forever")


if __name__ == "__main__":
    main()

Answer 1

好吧，与此同时，在 chatgpt 的帮助下，我得到了我想要实现的目标。现在我可以启动和停止脚本了。

import threading
import time
from pynput.keyboard import Listener, KeyCode

startStopButton = KeyCode(char='s')
terminateButton = KeyCode(char='\x03')

running = False
program_running = True


def start():
    global running
    running = True


def stop():
    global running
    running = False

def exit_script():
    global running, program_running
    running = False
    program_running = False


def print_hi():
    while program_running:
        if running:
            print("hi")
        time.sleep(1)  # Adjust the delay as needed


def on_press(key):
    if key == startStopButton:
        if running:
            stop()
        else:
            start()
    elif key == terminateButton:
        exit_script()
        listener.stop()


print("Press 's' to start, 'ctrl+c' to exit.")
print_hi_thread = threading.Thread(target=print_hi)
print_hi_thread.start()

with Listener(on_press=on_press) as listener:
    listener.join()

Answer 2

仅包含睡眠和打印语句以查看结果

结果还好

$ winpty python test.py
not stopped forever
not stopped forever
pressed ctrl C

import signal
import sys
import time


def signal_abort_script(signal, frame):
    """
    Signal handler function to catch KeyboardInterrupt (Ctrl+C) and exit the script gracefully.
    """
    print("pressed ctrl C")
    sys.exit()


def main():
    # Set up the signal handler to catch KeyboardInterrupt (Ctrl+C)
    signal.signal(signal.SIGINT, signal_abort_script)

    # print not stopped forever
    while True:
        time.sleep(1)
        print("not stopped forever")


if __name__ == "__main__":
    main()