elegant_shutdown.py

import threading
import time

counter = 0
stop = False

def worker():
    global counter
    while not stop:
        print(f'{counter=}')
        counter += 1
        time.sleep(0.5)

t = threading.Thread(target=worker)
t.start()

while True:
    try:
        time.sleep(1)
    except KeyboardInterrupt:
        print(f'{counter=}')
        if input('Recover? (Y/n): ').strip() == 'n':
            stop = True
            t.join()
            break
        print('resume!')