如何在python中创建一个表示设定天数的日期对象
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how to create a date object in python representing a set number of days
提问by avorum
I would like to define a variable to be a datetime object representing the number of days that is entered by the user. For example.
我想将一个变量定义为一个表示用户输入的天数的日期时间对象。例如。
numDays = #input from user
deltaDatetime = #this is what I'm trying to figure out how to do
str(datetime.datetime.now() + deltaDatetime)
This code would print out a datetime representing 3 days from today if the user entered 3 as their input. Any idea how to do this? I'm completely lost as to an effective approach to this problem.
如果用户输入 3 作为他们的输入，此代码将打印出表示从今天起 3 天的日期时间。知道如何做到这一点吗？我完全不知道解决这个问题的有效方法。
EDIT: Because of how my system is set up, the variable storing the "deltaDatetime" value must be a datetime value. As I said in the comments, something like 3 days becomes Year 0, January 3rd.
编辑：由于我的系统是如何设置的，存储“deltaDatetime”值的变量必须是一个日期时间值。正如我在评论中所说，像 3 天这样的事情变成了 0 年，1 月 3 日。
回答by Mark Ransom
deltaDateTime = datetime.timedelta(days=3)
回答by zzzirk
It's fairly straightforward using timedelta from the standard datetime library:
使用标准日期时间库中的 timedelta 相当简单：
import datetime
numDays = 5 # heh, removed the 'var' in front of this (braincramp)
print datetime.datetime.now() + datetime.timedelta(days=numDays)
