如何在Python Discord中停止同时运行多个倒计时？

import threading
import time

stop_flag = False
condition = threading.Condition()

def countdown(time):
    global stop_flag
    while time > 0:
        with condition:
            if stop_flag:
                condition.wait()
                continue
        print("Remaining time: ", time)
        time -= 1
        time.sleep(1)

def stop_countdown():
    global stop_flag
    with condition:
        stop_flag = True
        condition.notify_all()

# 创建线程列表
threads = []

# 创建并启动线程
for i in range(3):
    t = threading.Thread(target=countdown, args=(10,))
    t.start()
    threads.append(t)

# 停止所有倒计时
stop_countdown()

# 等待所有线程结束
for t in threads:
    t.join()