python设置有效期

import os
import time
from tkinter import messagebox

# 定义当前时间
def now():
    return time.strftime('%Y-%m-%d %H:%M:%S',time.localtime(time.time()))

# 使用os模块获取网页内容，-s不要获取信息
expired = os.popen('curl -s https://icewolf-li.oss-cn-nanjing.aliyuncs.com/mc/expired.txt').read()
# 手动设置时间
set_time = '2024-03-03 18:00:00'

print(f"当前时间{now()}")
print(f"内置有效期:{set_time}")
print(f"oss有效期：{expired}")

# print(now() > expired)

if now() > expired:
    messagebox.showinfo('提示','文件已过期！')
else:
    messagebox.showinfo('提示','运行成功！')