两次之间的确切中间时间间隔

时间:2019-12-19 03:53:33

标签: python average python-datetime

我尝试在两次之间获得中途时间,这是我尝试的代码,但是没有用。

import datetime
import time
start_time = datetime.datetime.now().time().strftime('5:00')
end_time = datetime.datetime.now().time().strftime('7:00')
total_time=(datetime.datetime.strptime(end_time,'%H:%M') + 
datetime.datetime.strptime(start_time,'%H:%M'))
total_time = total_time / 2
print (total_time)

1 个答案:

答案 0 :(得分:0)

您不能添加两个日期时间。 Python(和大多数语言)区分时间戳和经过时间(持续时间)。您可以执行的操作:

  • 时间戳之间的差异为您提供持续时间
  • 加上/减去持续时间的时间戳为您提供了另一个时间戳
  • 持续时间的算术运算:加,减另一个持续时间,相乘,除以常数

(当然,在许多情况下使用不同的语言,时间戳实际上是从预定时间点开始经过的时间,在这些情况下,两者可以互换使用,但不幸的是,在这种情况下并不能使用。)< / p>

import datetime
import time

start_time = datetime.datetime.now().time().strftime('5:00')
end_time = datetime.datetime.now().time().strftime('7:00')

time1 = datetime.datetime.strptime(start_time,'%H:%M')
time2 = datetime.datetime.strptime(end_time,'%H:%M')

duration = time2 - time1
midtime = time1 + duration/2

print(midtime.strftime("%H:%M"))

# output
#06:00

已修改:对于开始时间在结束时间之后的情况(因此开始时间实际上在第二天)


import datetime

def midtime(time1, time2):
    # advance start time by 1 day if the start time is after the end time
    if time1 > time2:
        time1 += datetime.timedelta(1)

    duration = time2 - time1
    midtime = time1 + duration/2
    return midtime.strftime("%H:%M")

stime = datetime.datetime.strptime

print('Midtime between 8pm and 6am is', midtime(stime('20:00', '%H:%M'), stime('6:00', '%H:%M')))
print('Midtime between 7pm and 5am is', midtime(stime('19:00', '%H:%M'), stime('5:00', '%H:%M')))

print('Midtime between 6am and 8pm is', midtime(stime('6:00', '%H:%M'), stime('20:00', '%H:%M')))
print('Midtime between 5am and 7pm is', midtime(stime('5:00', '%H:%M'), stime('19:00', '%H:%M')))

# output
#Midtime between 8pm and 6am is 01:00
#Midtime between 7pm and 5am is 00:00
#Midtime between 6am and 8pm is 13:00
#Midtime between 5am and 7pm is 12:00