Question

获得明天约会的最干净，最恐怖的方式是什么？必须有一个更好的方法，而不是在一天中添加一个，在月末处理日期等等。

Answer 1

datetime.date.today() + datetime.timedelta(days=1)应该做的伎俩

Answer 2

timedelta可以处理添加天，秒，微秒，毫秒，分钟，小时或周。

>>> import datetime
>>> today = datetime.date.today()
>>> today
datetime.date(2009, 10, 1)
>>> today + datetime.timedelta(days=1)
datetime.date(2009, 10, 2)
>>> datetime.date(2009,10,31) + datetime.timedelta(hours=24)
datetime.date(2009, 11, 1)

正如评论中所说，闰日没有问题：

>>> datetime.date(2004, 2, 28) + datetime.timedelta(days=1)
datetime.date(2004, 2, 29)
>>> datetime.date(2004, 2, 28) + datetime.timedelta(days=2)
datetime.date(2004, 3, 1)
>>> datetime.date(2005, 2, 28) + datetime.timedelta(days=1)
datetime.date(2005, 3, 1)

Answer 3

没有处理leap seconds tho：

>>> from datetime import datetime, timedelta
>>> dt = datetime(2008,12,31,23,59,59)
>>> str(dt)
'2008-12-31 23:59:59'
>>> # leap second was added at the end of 2008, 
>>> # adding one second should create a datetime
>>> # of '2008-12-31 23:59:60'
>>> str(dt+timedelta(0,1))
'2009-01-01 00:00:00'
>>> str(dt+timedelta(0,2))
'2009-01-01 00:00:01'

织补。

编辑 - @Mark：文档说“是”，但代码说“不是那么多”：

>>> time.strptime("2008-12-31 23:59:60","%Y-%m-%d %H:%M:%S")
(2008, 12, 31, 23, 59, 60, 2, 366, -1)
>>> time.mktime(time.strptime("2008-12-31 23:59:60","%Y-%m-%d %H:%M:%S"))
1230789600.0
>>> time.gmtime(time.mktime(time.strptime("2008-12-31 23:59:60","%Y-%m-%d %H:%M:%S")))
(2009, 1, 1, 6, 0, 0, 3, 1, 0)
>>> time.localtime(time.mktime(time.strptime("2008-12-31 23:59:60","%Y-%m-%d %H:%M:%S")))
(2009, 1, 1, 0, 0, 0, 3, 1, 0)

我认为gmtime或localtime会获取mktime返回的值并返回原始元组，其中60为秒数。而这个测试表明，这些闰秒可能会逐渐消失......

>>> a = time.mktime(time.strptime("2008-12-31 23:59:60","%Y-%m-%d %H:%M:%S"))
>>> b = time.mktime(time.strptime("2009-01-01 00:00:00","%Y-%m-%d %H:%M:%S"))
>>> a,b
(1230789600.0, 1230789600.0)
>>> b-a
0.0

Answer 4

即使是基本的time模块也可以处理：

import time
time.localtime(time.time() + 24*3600)

获得明天约会的最干净，最恐怖的方式？

4 个答案: