How to calculate the time and find the remaining hours - python

Question How do I print out the remaining hours of overtime
Example: I have to be at work for 8 hours, and if my time goes over 8 hours as shown in OUTPUT then I just wanna have the 00:03:00 printed out..
Meaning that I have 3 min overtime that day.
from datetime import datetime
s1 = '07:15:00'
s2 = '16:18:00'
FMT = '%H:%M:%S'
tdelta = datetime.strptime(s2, FMT) - datetime.strptime(s1, FMT)
print(tdelta)
OUTPUT
9:03:00

Subtract the length of the working day with a timedelta object...
from datetime import datetime, timedelta
s1 = '07:15:00'
s2 = '16:18:00'
FMT = '%H:%M:%S'
work_time = timedelta(hours=8)
lunch_time = timedelta(hours=1)
tdelta = datetime.strptime(s2, FMT) - datetime.strptime(s1, FMT) - work_time - lunch_time
print(tdelta)
Output:
0:03:00

You need to subtract the length of the working day (and it would appear an hour to account for breaks) from tdelta to determine the excess.

Related

How to get datetime difference in hour format between two dates columns on pandas? [duplicate]

How do I calculate the difference in time in minutes for the following timestamp in Python?
2010-01-01 17:31:22
2010-01-03 17:31:22
minutes_diff = (datetime_end - datetime_start).total_seconds() / 60.0
RSabet's answer doesn't work in cases where the dates don't have the same exact time.
Original problem:
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 17:31:22', fmt)
daysDiff = (d2-d1).days
print daysDiff
> 2
# Convert days to minutes
minutesDiff = daysDiff * 24 * 60
print minutesDiff
> 2880
d2-d1 gives you a datetime.timedelta and when you use days it will only show you the days in the timedelta. In this case it works fine, but if you would have the following.
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 16:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
daysDiff = (d2-d1).days
print daysDiff
> 2
# Convert days to minutes
minutesDiff = daysDiff * 24 * 60
print minutesDiff
> 2880 # that is wrong
It would have still given you the same answer since it still returns 2 for days; it ignores the hour, min and second from the timedelta.
A better approach would be to convert the dates to a common format and then do the calculation. The easiest way to do this is to convert them to Unix timestamps. Here is the code to do that.
from datetime import datetime
import time
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
# Convert to Unix timestamp
d1_ts = time.mktime(d1.timetuple())
d2_ts = time.mktime(d2.timetuple())
# They are now in seconds, subtract and then divide by 60 to get minutes.
print int(d2_ts-d1_ts) / 60
> 3043 # Much better
In case someone doesn't realize it, one way to do this would be to combine Christophe and RSabet's answers:
from datetime import datetime
import time
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
diff = d2 -d1
diff_minutes = (diff.days * 24 * 60) + (diff.seconds/60)
print(diff_minutes)
> 3043
To calculate with a different time date:
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 16:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
diff = d2-d1
diff_minutes = diff.seconds/60
Use datetime.strptime() to parse into datetime instances, and then compute the difference, and finally convert the difference into minutes.
The result depends on the timezone that corresponds to the input time strings.
The simplest case if both dates use the same utc offset:
#!/usr/bin/env python3
from datetime import datetime, timedelta
time_format = "%Y-%d-%m %H:%M:%S"
dt1 = datetime.strptime("2010-01-01 17:31:22", time_format)
dt2 = datetime.strptime("2010-01-03 17:31:22", time_format)
print((dt2 - dt1) // timedelta(minutes=1)) # minutes
If your Python version doesn't support td // timedelta; replace it with int(td.total_seconds() // 60).
If the input time is in the local timezone that might have different utc offset at different times e.g., it has daylight saving time then you should make dt1, dt2 into aware datetime objects before finding the difference, to take into account the possible changes in the utc offset.
The portable way to make an aware local datetime objects is to use pytz timezones:
#!/usr/bin/env python
from datetime import timedelta
import tzlocal # $ pip install tzlocal
local_tz = tzlocal.get_localzone() # get pytz timezone
aware_dt1, aware_dt2 = map(local_tz.localize, [dt1, dt2])
td = aware_dt2 - aware_dt1 # elapsed time
If either dt1 or dt2 correspond to an ambiguous time then the default is_dst=False is used to disambiguate. You could set is_dst=None to raise an exception for ambiguous or non-existent local times instead.
If you can't install 3rd party modules then time.mktime() could be used from #Ken Cochrane's answer that can find the correct utc offset on some platforms for some dates in some timezones -- if you don't need a consistent (but perhaps wrong) result then it is much better than doing dt2 - dt1 with naive datetime objects that always fails if the corresponding utc offsets are different.
If you are trying to find the difference between timestamps that are in pandas columns, the the answer is fairly simple.
If you need it in days or seconds then
# For difference in days:
df['diff_in_days']=(df['timestamp2'] - df['timestamp1']).dt.days
# For difference in seconds
df['diff_in_seconds']=(df['timestamp2'] - df['timestamp1']).dt.seconds
Now minute is tricky as dt.minute works only on datetime64[ns] dtype.
whereas the column generated from subtracting two datetimes has format
AttributeError: 'TimedeltaProperties' object has no attribute 'm8'
So like mentioned by many above to get the actual value of the difference in minute you have to do:
df['diff_in_min']=df['diff_in_seconds']/60
But if just want the difference between the minute parts of the two timestamps then do the following
#convert the timedelta to datetime and then extract minute
df['diff_in_min']=(pd.to_datetime(df['timestamp2']-df['timestamp1'])).dt.minute
You can also read the article https://docs.python.org/3.4/library/datetime.html
and see section 8.1.2 you'll see the read only attributes are only seconds,days and milliseconds. And this settles why the minute function doesn't work directly.
In Other ways to get difference between date;
import dateutil.parser
import datetime
timeDifference = current_date - dateutil.parser.parse(last_sent_date)
time_difference_in_minutes = (int(timeDifference.days) * 24 * 60) + int((timeDifference.seconds) / 60)
Thanks
As was kind of said already, you need to use datetime.datetime's strptime method:
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 17:31:22', fmt)
daysDiff = (d2-d1).days
# convert days to minutes
minutesDiff = daysDiff * 24 * 60
print minutesDiff
there is also a sneak way with pandas:
pd.to_timedelta(x) - pd.to_timedelta(y)
You can solve it using divmod,
minutes = divmod((end_date - start_date).total_seconds(), 60)[0]
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 17:31:22', fmt)
print (d2-d1).days * 24 * 60

calculate work time between two times in python [duplicate]

This question already has answers here:
How to calculate the time interval between two time strings
(15 answers)
Closed 1 year ago.
i have two Datetimes for worker ( start work time , end work time) . im just trying to subtract the end work time from start work time
starttime = "23:51:26"
endtime = "04:10:11"
FMT = '%H:%M:%S'
tdelta = datetime.strptime(endtime, FMT) - datetime.strptime(starttime, FMT)
print(tdelta)
Result
-1 day, 4:18:45
I want the result to be 4:18:45
any help ? thanks
Here your snippet!
from datetime import datetime, timedelta
starttime = "04:10:11"
endtime = "23:51:26"
FMT = '%H:%M:%S'
t1 = datetime.strptime(starttime, FMT)
t2 = datetime.strptime(endtime, FMT)
tdelta = (t1 - t2) * (1 - 2 * (t1 < t2))
print(tdelta)

Calculating time difference and splitting datetime elements into variables

I would like to calculate the time difference between two 24-hour time values, containing only the hour, minute, and second values. Then, I would like to split up the time difference into the hour, minute, and seconds values, and output them as three different variables.
For example, my desired output would be:
time1 = '10:33:26'
time2 = '17:25:39'
Hours: 6
Minutes: 52
Seconds: 13
Because 17:25:39 is 6 hours, 52 minutes, and 13 seconds after 10:33:26.
I have tried the following code:
from datetime import datetime
s1 = '10:33:26'
s2 = '17:25:39'
FMT = '%H:%M:%S'
tdelta = datetime.strptime(s2, FMT) - datetime.strptime(s1, FMT)
print(tdelta)
It correctly outputs 6:52:13, but I don't know how to split up the 6, 52, and 13 into three different variables.
You probably want to do the numeric calculation yourself directly from the total_seconds(), rather than relying on back-parsing the result of the string conversion (intended for human-readable output). For example:
from datetime import datetime
s1 = '10:33:26'
s2 = '17:25:39'
FMT = '%H:%M:%S'
tdelta = datetime.strptime(s2, FMT) - datetime.strptime(s1, FMT)
ts = int(tdelta.total_seconds())
secs = ts % 60
mins = (ts // 60) % 60
hours = (ts // 3600)
print(hours, mins, secs)
You can perform numeric computation by using timedelta.
time1 = datetime.timedelta(hours=10, minutes=33,seconds=26)
time2 = datetime.timedelta(hours=17, minutes=25,seconds=39)
time_diff = time2 - time1
hour, min, sec = str(time_diff ).split(':')
print(hour, min, sec)
You can convert the output to a string and then use the split() method. For example:
str(tdelta).split(':')
Will output:
['6', '52', '13']
Then you can simply loop through the outputted list.

Subtract hours and minutes from time

In my task what I need to do is to subtract some hours and minutes like (0:20,1:10...any value) from time (2:34 PM) and on the output side I need to display the time after subtraction.
time and hh:mm value are hardcoded
Ex:
my_time = 1:05 AM
duration = 0:50
so output should be 12:15 PM
Output should be exact and in AM/PM Format and Applicable for all values
(0:00 < Duration > 6:00) .
I don't care about seconds, I only need the hours and minutes.
from datetime import datetime, timedelta
d = datetime.today() - timedelta(hours=0, minutes=50)
d.strftime('%H:%M %p')
This worked for me :
from datetime import datetime
s1 = '10:04:00'
s2 = '11:03:11' # for example
format = '%H:%M:%S'
time = datetime.strptime(s2, format) - datetime.strptime(s1, format)
print time
from datetime import datetime
d1 = datetime.strptime("01:05:00.000", "%H:%M:%S.%f")
d2 = datetime.strptime("00:50:00.000", "%H:%M:%S.%f")
print (d1-d2)

Date difference in minutes in Python

How do I calculate the difference in time in minutes for the following timestamp in Python?
2010-01-01 17:31:22
2010-01-03 17:31:22
minutes_diff = (datetime_end - datetime_start).total_seconds() / 60.0
RSabet's answer doesn't work in cases where the dates don't have the same exact time.
Original problem:
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 17:31:22', fmt)
daysDiff = (d2-d1).days
print daysDiff
> 2
# Convert days to minutes
minutesDiff = daysDiff * 24 * 60
print minutesDiff
> 2880
d2-d1 gives you a datetime.timedelta and when you use days it will only show you the days in the timedelta. In this case it works fine, but if you would have the following.
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 16:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
daysDiff = (d2-d1).days
print daysDiff
> 2
# Convert days to minutes
minutesDiff = daysDiff * 24 * 60
print minutesDiff
> 2880 # that is wrong
It would have still given you the same answer since it still returns 2 for days; it ignores the hour, min and second from the timedelta.
A better approach would be to convert the dates to a common format and then do the calculation. The easiest way to do this is to convert them to Unix timestamps. Here is the code to do that.
from datetime import datetime
import time
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
# Convert to Unix timestamp
d1_ts = time.mktime(d1.timetuple())
d2_ts = time.mktime(d2.timetuple())
# They are now in seconds, subtract and then divide by 60 to get minutes.
print int(d2_ts-d1_ts) / 60
> 3043 # Much better
In case someone doesn't realize it, one way to do this would be to combine Christophe and RSabet's answers:
from datetime import datetime
import time
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
diff = d2 -d1
diff_minutes = (diff.days * 24 * 60) + (diff.seconds/60)
print(diff_minutes)
> 3043
To calculate with a different time date:
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 16:31:22', fmt)
d2 = datetime.strptime('2010-01-03 20:15:14', fmt)
diff = d2-d1
diff_minutes = diff.seconds/60
Use datetime.strptime() to parse into datetime instances, and then compute the difference, and finally convert the difference into minutes.
The result depends on the timezone that corresponds to the input time strings.
The simplest case if both dates use the same utc offset:
#!/usr/bin/env python3
from datetime import datetime, timedelta
time_format = "%Y-%d-%m %H:%M:%S"
dt1 = datetime.strptime("2010-01-01 17:31:22", time_format)
dt2 = datetime.strptime("2010-01-03 17:31:22", time_format)
print((dt2 - dt1) // timedelta(minutes=1)) # minutes
If your Python version doesn't support td // timedelta; replace it with int(td.total_seconds() // 60).
If the input time is in the local timezone that might have different utc offset at different times e.g., it has daylight saving time then you should make dt1, dt2 into aware datetime objects before finding the difference, to take into account the possible changes in the utc offset.
The portable way to make an aware local datetime objects is to use pytz timezones:
#!/usr/bin/env python
from datetime import timedelta
import tzlocal # $ pip install tzlocal
local_tz = tzlocal.get_localzone() # get pytz timezone
aware_dt1, aware_dt2 = map(local_tz.localize, [dt1, dt2])
td = aware_dt2 - aware_dt1 # elapsed time
If either dt1 or dt2 correspond to an ambiguous time then the default is_dst=False is used to disambiguate. You could set is_dst=None to raise an exception for ambiguous or non-existent local times instead.
If you can't install 3rd party modules then time.mktime() could be used from #Ken Cochrane's answer that can find the correct utc offset on some platforms for some dates in some timezones -- if you don't need a consistent (but perhaps wrong) result then it is much better than doing dt2 - dt1 with naive datetime objects that always fails if the corresponding utc offsets are different.
If you are trying to find the difference between timestamps that are in pandas columns, the the answer is fairly simple.
If you need it in days or seconds then
# For difference in days:
df['diff_in_days']=(df['timestamp2'] - df['timestamp1']).dt.days
# For difference in seconds
df['diff_in_seconds']=(df['timestamp2'] - df['timestamp1']).dt.seconds
Now minute is tricky as dt.minute works only on datetime64[ns] dtype.
whereas the column generated from subtracting two datetimes has format
AttributeError: 'TimedeltaProperties' object has no attribute 'm8'
So like mentioned by many above to get the actual value of the difference in minute you have to do:
df['diff_in_min']=df['diff_in_seconds']/60
But if just want the difference between the minute parts of the two timestamps then do the following
#convert the timedelta to datetime and then extract minute
df['diff_in_min']=(pd.to_datetime(df['timestamp2']-df['timestamp1'])).dt.minute
You can also read the article https://docs.python.org/3.4/library/datetime.html
and see section 8.1.2 you'll see the read only attributes are only seconds,days and milliseconds. And this settles why the minute function doesn't work directly.
In Other ways to get difference between date;
import dateutil.parser
import datetime
timeDifference = current_date - dateutil.parser.parse(last_sent_date)
time_difference_in_minutes = (int(timeDifference.days) * 24 * 60) + int((timeDifference.seconds) / 60)
Thanks
As was kind of said already, you need to use datetime.datetime's strptime method:
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 17:31:22', fmt)
daysDiff = (d2-d1).days
# convert days to minutes
minutesDiff = daysDiff * 24 * 60
print minutesDiff
there is also a sneak way with pandas:
pd.to_timedelta(x) - pd.to_timedelta(y)
You can solve it using divmod,
minutes = divmod((end_date - start_date).total_seconds(), 60)[0]
from datetime import datetime
fmt = '%Y-%m-%d %H:%M:%S'
d1 = datetime.strptime('2010-01-01 17:31:22', fmt)
d2 = datetime.strptime('2010-01-03 17:31:22', fmt)
print (d2-d1).days * 24 * 60

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