判断文件的更改时间是否在24小时内：

vi a1.py

#!/usr/bin/python

import os
import datetime

dir="/root/ming.txt"

now = datetime.datetime.now()
deltaH = datetime.timedelta(seconds=86400)

f = datetime.datetime.fromtimestamp(os.path.getmtime(dir))

if f > (now - deltaH):
print dir

:wq

python a1.py