添加timedelta时，如何在第二天开始使用datetime？

问题描述

鉴于当前时间 23:30:00 ，我添加了两个小时（7200秒）。如何获得同一天的时间？所以我想要结果 25:30:00 。

Given a current time of 23:30:00 and I add two hours (7200 seconds). How can I get the time of the same day? So I want as a result 25:30:00.

目前我只能得到第二天：

Currently I am only able to get the time of the next day:

>>> from datetime import datetime, timedelta
>>> current_time  = "23:30:00"
>>> duration = 3600
>>> (datetime.strptime(current_time, "%H:%M:%S") + timedelta(seconds=duration)).strftime("%H:%M:%S")
'00:30:00'

推荐答案

如果您只想增加小时数，秒，并创建一个字符串：

If you are just wanting to increment hours minutes, seconds and create a string:

def weird_time(current_time,duration):
    start = datetime.strptime(current_time, "%H:%M:%S")
    st_hr, st_min, st_sec = start.hour, start.minute, start.second
    mn, secs = divmod(duration, 60)
    hour, mn = divmod(mn, 60)
    mn, secs = st_min+mn, st_sec+secs
    if secs > 59:
        m, secs = divmod(secs,60)
        mn += m
    if mn > 59:
        h, mn = divmod(mn,60)
        hour += h
    return "{:02}:{:02}:{:02}".format(st_hr+hour, mn, secs)

输出：

In [19]: weird_time("23:30:00",7200)
Out[19]: '25:30:00'

In [20]: weird_time("23:30:00",3600)
Out[20]: '24:30:00'

In [21]: weird_time("23:30:59",7203)
Out[21]: '25:31:02'

In [22]: weird_time("23:30:59",3601)
Out[22]: '24:31:00'

自己计算，我们也可以使用timedelta计算总秒数，并从中进行计算：

Instead of doing all the calculations ourselves we can also use timedelta to calculate the total seconds and do our calculations from that:

from datetime import datetime,timedelta


def weird_time(current_time,duration):
    start = datetime.strptime(current_time, "%H:%M:%S")
    st_hr, st_min, st_sec = start.hour, start.minute, start.second
    comb = timedelta(minutes=st_min,seconds=st_sec) + timedelta(seconds=duration)
    mn, sec = divmod(comb.total_seconds(), 60)
    hour, mn = divmod(mn, 60)
    return "{:02}:{:02}:{:02}".format(int(st_hr+hour), int(mn), int(sec))

哪个输出相同：

In [29]: weird_time("23:30:00",7200)
Out[29]: '25:30:00'

In [30]: weird_time("23:30:00",3600)
Out[30]: '24:30:00'

In [31]: weird_time("23:30:59",7203)
Out[31]: '25:31:02'

In [32]: weird_time("23:30:59",3601)
Out[32]: '24:31:00'

In [33]:  weird_time("05:00:00",3600)
Out[33]: '06:00:00'

小时只需要增加，我们需要抓住的部分是当任一秒，分钟或两者的总和大于59时。

The hours just need to be incremented, the part that we need to catch is when either the combined total of either seconds, minutes or both is greater than 59.

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