How to activate count down with hotkey while stop that count down with another hotkey?

[mywingdx0122]

I want to register 2 hotkeys, such as "1" and "2". Press 1 to activate count down. While in counting down process, press 2 to interrupt the count down.

I'd like to know how to do this task?

Below is my code, but it does not work, press 2 will not stop the counting down.

Please help me, thanks in advance.

Code

COUNTING_DOWN_STOP_FLAG = False

def countDown():
    global COUNTING_DOWN_STOP_FLAG
    COUNTING_DOWN_STOP_FLAG = False
    for i in range(10):
        if COUNTING_DOWN_STOP_FLAG:
            print("Interrupted!")
            break
        sleep(1)
        print(10-i)

def stopDown():
    global COUNTING_DOWN_STOP_FLAG
    COUNTING_DOWN_STOP_FLAG = True

def try1():
    keyboard.add_hotkey("1", countDown)
    keyboard.add_hotkey("2", stopDown)
    keyboard.wait()

if __name__ == '__main__':

    try1()

Output