有没有办法在本地缓存python字典，并使单独的记录定期过期？

import time
import pickle

# 创建一个带有过期时间戳的字典记录
def create_record(key, value, expiration):
    record = {'value': value, 'expiration': time.time() + expiration}
    return record

# 检查记录是否过期
def is_expired(record):
    return time.time() > record['expiration']

# 保存字典到本地缓存文件
def save_cache(cache):
    with open('cache.pickle', 'wb') as file:
        pickle.dump(cache, file)

# 从本地缓存文件加载字典
def load_cache():
    try:
        with open('cache.pickle', 'rb') as file:
            cache = pickle.load(file)
    except FileNotFoundError:
        cache = {}
    return cache

# 添加或更新缓存记录
def set_cache(key, value, expiration):
    cache = load_cache()
    cache[key] = create_record(key, value, expiration)
    save_cache(cache)

# 获取缓存记录
def get_cache(key):
    cache = load_cache()
    if key in cache:
        record = cache[key]
        if not is_expired(record):
            return record['value']
        else:
            del cache[key]  # 过期的记录需要删除
            save_cache(cache)
    return None

# 示例用法
set_cache('key1', 'value1', 60)  # 缓存60秒
set_cache('key2', 'value2', 120)  # 缓存120秒

print(get_cache('key1'))  # 输出: value1
time.sleep(61)
print(get_cache('key1'))  # 输出: None，记录已过期