How to subtract time in python?

Question

I'm using Python 3.10 and I'm trying to subtract two time values from each other. Now I have tried bunch of ways to do that but getting errors.

day_time = timezone.now()
day_name = day_time.strftime("%Y-%m-%d %H:%M:%S")
end_Time = datetime.strptime(latest_slots.end_hour, '%Y-%m-%d %H:%M:%S')
print(end_Time- day_name)

error: TypeError: unsupported operand type(s) for -: 'str' and 'str'

I also tried:

day_time = timezone.now()
end_Time = datetime.strptime(latest_slots.end_hour, '%Y-%m-%d %H:%M:%S')
print(end_Time- day_time)

error: TypeError: can't subtract offset-naive and offset-aware datetimes

And this as well:

day_time = timezone.now()
end_Time = datetime.strptime(latest_slots.end_hour, '%Y-%m-%d %H:%M:%S.000000.00+00')
print(end_Time- day_time)

error: ValueError: time data '2022-11-27 00:00:00' does not match format '%Y-%m-%d %H:%M:%S.000000.00+00'

Does this answer your question? [Python subtract time](https://stackoverflow.com/questions/24973163/python-subtract-time) — wovano, Nov 18 '22 at 10:14
See also [Can't subtract offset-naive and offset-aware datetimes](https://stackoverflow.com/questions/796008/cant-subtract-offset-naive-and-offset-aware-datetimes) — wovano, Nov 18 '22 at 10:14
[How to subtract time?](https://stackoverflow.com/questions/71042018/how-to-subtract-time) — wovano, Nov 18 '22 at 10:15
[subtract two times in python](https://stackoverflow.com/questions/5259882/subtract-two-times-in-python) — wovano, Nov 18 '22 at 10:15
[Subtract time from datetime.time object](https://stackoverflow.com/questions/42594164/subtract-time-from-datetime-time-object) — wovano, Nov 18 '22 at 10:16
[Python: Subtracting time from datetime](https://stackoverflow.com/questions/46474350/python-subtracting-time-from-datetime) — wovano, Nov 18 '22 at 10:16
and almost 3000 more questions and answers in [search](https://stackoverflow.com/search?q=%5Bpython%5D+subtract+time) — wovano, Nov 18 '22 at 10:17

score 0 · Answer 1 · answered Nov 16 '22 at 10:59

0

Your second approach is almost right, but you should use

day_time = datetime.now()

When you subtract you will get a a datetime.timedelta object

I think the issue with your second approach is that by using timezone you also have the timezone as part of the datetime, instead of just the date and time.

answered Nov 16 '22 at 10:59

Ftagliacarne

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I still unable to do that. I didn't get it. – Ahmed Yasin Nov 16 '22 at 11:14
Could you update your question with the issue you get when trying the proposed solution? – Ftagliacarne Nov 16 '22 at 11:16

score 0 · Answer 2 · edited Nov 16 '22 at 11:39

0

You can solve this by using a combination of the datetime and timedelta libraries like this:

from datetime import datetime,timedelta
day_time = datetime.now()
end_time = datetime.now() + timedelta(days= 2,hours =7)
result = end_time - day_time
print(result)

# Output :--> 2 days, 7:00:00.000005

edited Nov 16 '22 at 11:39

Nick

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answered Nov 16 '22 at 11:16

Bharat Adhikari

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score 0 · Answer 3 · answered Nov 16 '22 at 11:26

I have solved this problem by doing the following approach.

        #first i get the current time
        day_time = timezone.now()
        #second converted that into end_time format
        day_time = day_time.strftime("%Y-%m-%d %H:%M:%S")
        #third converted that string again into time object
        day_time = datetime.strptime(day_time, '%Y-%m-%d %H:%M:%S')
        end_Time = datetime.strptime(latest_slots.end_hour, '%Y-%m-%d %H:%M:%S')

How to subtract time in python?

3 Answers3