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在python中,向datetime.time添加n秒的标准方法是什么?

math time datetime python

295

Paul Stephenson · 技术社区 · 16 年前

给定一个 datetime.time 在python中,是否有一种标准的方法向它添加整数秒,以便 11:34:59 + 3 = 11:35:02 比如说?

这些显而易见的想法行不通:

>>> datetime.time(11, 34, 59) + 3
TypeError: unsupported operand type(s) for +: 'datetime.time' and 'int'
>>> datetime.time(11, 34, 59) + datetime.timedelta(0, 3)
TypeError: unsupported operand type(s) for +: 'datetime.time' and 'datetime.timedelta'
>>> datetime.time(11, 34, 59) + datetime.time(0, 0, 3)
TypeError: unsupported operand type(s) for +: 'datetime.time' and 'datetime.time'

最后我写了这样的函数:

def add_secs_to_time(timeval, secs_to_add):
    secs = timeval.hour * 3600 + timeval.minute * 60 + timeval.second
    secs += secs_to_add
    return datetime.time(secs // 3600, (secs % 3600) // 60, secs % 60)

不过,我忍不住想,我错过了一个更简单的方法。

相关的

python time + timedelta equivalent

8 回复 | 直到 16 年前

412

paxdiablo 12 年前

datetime timedelta time

import datetime
a = datetime.datetime(100,1,1,11,34,59)
b = a + datetime.timedelta(0,3) # days, seconds, then other fields.
print a.time()
print b.time()

11:34:59
11:35:02

b = a + datetime.timedelta(seconds=3)

addSecs

import datetime

def addSecs(tm, secs):
    fulldate = datetime.datetime(100, 1, 1, tm.hour, tm.minute, tm.second)
    fulldate = fulldate + datetime.timedelta(seconds=secs)
    return fulldate.time()

a = datetime.datetime.now().time()
b = addSecs(a, 300)
print a
print b

 09:11:55.775695
 09:16:55

Eli Courtwright 16 年前

sometime = get_some_time() # the time to which you want to add 3 seconds
later = (datetime.combine(date.today(), sometime) + timedelta(seconds=3)).time()

unmounted 16 年前

>>> b = a + datetime.timedelta(seconds=3000)
>>> b
datetime.datetime(1, 1, 1, 12, 24, 59)

Paul Stephenson 16 年前

add_secs_to_time()

def add_secs_to_time(timeval, secs_to_add):
    dummy_date = datetime.date(1, 1, 1)
    full_datetime = datetime.datetime.combine(dummy_date, timeval)
    added_datetime = full_datetime + datetime.timedelta(seconds=secs_to_add)
    return added_datetime.time()

(datetime.datetime.combine(datetime.date(1, 1, 1), timeval) + datetime.timedelta(seconds=secs_to_add)).time()

rescdsk 13 年前

datetime.time

>>> import datetime
>>> import nptime
>>> nptime.nptime(11, 34, 59) + datetime.timedelta(0, 3)
nptime(11, 35, 2)

nptime

https://github.com/tgs/nptime

George Sovetov 7 年前

datetime

timedelta

>>> from datetime import datetime, timedelta
>>> t = datetime.now() + timedelta(seconds=3000)
>>> print(t)
datetime.datetime(2018, 1, 17, 21, 47, 13, 90244)

std::chrono::duration

Tshilidzi Mudau Simon Müller 8 年前

datetime.datetime datetime.timedelta time()

Bart Van Loon 6 年前

arrow

sometime = arrow.now()
abitlater = sometime.shift(seconds=3)