使用多进程池将python输出写入文件时出现问题

from multiprocessing import Pool, Lock

def write_to_file(value, lock):
    # 获取锁
    lock.acquire()
    try:
        # 打开文件，写入内容
        with open('output.txt', 'a') as file:
            file.write(str(value) + '\n')
    finally:
        # 释放锁
        lock.release()

if __name__ == '__main__':
    # 创建进程池
    pool = Pool()
    # 创建进程锁
    lock = Lock()
    # 启动多个进程，执行写入文件操作
    for i in range(10):
        pool.apply_async(write_to_file, args=(i, lock))
    pool.close()
    pool.join()

from multiprocessing import Pool, Queue

def write_to_file(value, queue):
    # 将结果放入队列
    queue.put(value)

def save_to_file(queue):
    # 打开文件，写入队列中的内容
    with open('output.txt', 'a') as file:
        while not queue.empty():
            value = queue.get()
            file.write(str(value) + '\n')

if __name__ == '__main__':
    # 创建进程池和队列
    pool = Pool()
    queue = Queue()
    # 启动多个进程，执行写入队列操作
    for i in range(10):
        pool.apply_async(write_to_file, args=(i, queue))
    pool.close()
    pool.join()
    # 启动保存进程，将队列中的内容写入文件
    save_to_file(queue)