日期时间 - 10小时

Question

考虑:

now = datetime.datetime.now()
now
datetime.datetime(2009, 11, 6, 16, 6, 42, 812098)

如何从小时创建新的日期时间对象(past)和减去n值？

Answer 1

timedelta在datetime模块中使用:

import datetime
now = datetime.datetime.now()
past = now - datetime.timedelta(hours=10)

Answer 2

使用timedelta对象.

>>> now = datetime.datetime.now()
>>> now
datetime.datetime(2009, 11, 6, 16, 35, 50, 593000)
>>> ten_hours = datetime.timedelta(hours=10)
>>> now + ten_hours
datetime.datetime(2009, 11, 7, 2, 35, 50, 593000)
>>> now - ten_hours
datetime.datetime(2009, 11, 6, 6, 35, 50, 593000)