如何在Python中找到n天前的日期？ [英] How to find the date n days ago in Python?

问题描述

晚上好，

我想写一个脚本，给我python几天的时间（我们叫d），它给我日期我们是d天前。

I would like to write a script where I give python a number of days (let s call it d) and it gives me the date we were d days ago.

我正在为模块日期时间苦苦挣扎：

I am struggling with the module datetime:

import datetime 

tod = datetime.datetime.now()
d = timedelta(days = 50) 
a = tod - h 
Type Error : unsupported operand type for - : "datetime.timedelta" and 
"datetime.datetime" 

感谢您的帮助

推荐答案

您已将变量与变量混合在一起，可以减去timedelta d from datetime.datetime.now（）没有问题：

You have mixed something up with your variables, you can subtract timedelta d from datetime.datetime.now() with no issue:

import datetime 
tod = datetime.datetime.now()
d = datetime.timedelta(days = 50)
a = tod - d
print(a)
2014-12-13 22:45:01.743172

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