python - 如何在 python 中将日期时间对象移动 12 小时

Question

由于某种原因，日期时间对象伤了我的头。我正在写信来弄清楚如何将日期时间对象移动 12 小时。我还需要知道如何确定两个日期时间对象是否相差 1 分钟或更长时间。

Answer 1

datetime库有一个专门用于这种事情的 timedelta 对象:

import datetime

mydatetime = datetime.now() # or whatever value you want
twelvelater = mydatetime + datetime.timedelta(hours=12)
twelveearlier = mydatetime - datetime.timedelta(hours=12)

difference = abs(some_datetime_A - some_datetime_B)
# difference is now a timedelta object

# there are a couple of ways to do this comparision:
if difference > timedelta(minutes=1):
    print "Timestamps were more than a minute apart"

# or: 
if difference.total_seconds() > 60:
    print "Timestamps were more than a minute apart"