如何让程序等到计时器线程结束后再继续？

import threading
import time

def worker():
    print("计时器线程开始")
    time.sleep(5)  # 模拟耗时操作
    print("计时器线程结束")

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

timer_thread.join()  # 主线程等待计时器线程结束
print("主线程继续执行")

import threading
import time

condition = threading.Condition()

def worker():
    with condition:
        print("计时器线程开始")
        time.sleep(5)  # 模拟耗时操作
        print("计时器线程结束")
        condition.notify_all()  # 通知所有等待的线程

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

with condition:
    condition.wait()  # 主线程等待条件变量被通知
print("主线程继续执行")

function worker() {
    return new Promise((resolve) => {
        console.log("计时器线程开始");
        setTimeout(() => {
            console.log("计时器线程结束");
            resolve();
        }, 5000);  // 模拟耗时操作
    });
}

async function main() {
    await worker();  // 等待计时器线程结束
    console.log("主线程继续执行");
}

main();