datetime.timedelta计算2个时间的时间差:
注:
1、用于找出1天前、1月前、1年前的数据
2、配合datetime.datetime.fromtimestamp(os.path.getmtime(os.path.join(root,f)))抓取文件修改日期进行日期比较
vi a1.py
#!/usr/bin/python
import datetime
now = datetime.datetime.now()
deltaD = datetime.timedelta(days=1)
deltaM = datetime.timedelta(days=30)
deltaY = datetime.timedelta(days=365)
day = now - deltaD
Mon = now - deltaM
Year = now - deltaY
print day
print Mon
print Year
:wq