Add time values in Python

Question

I have a list of times that are in following format:

Hour:Minue:Second.Microseconds

File looks like this:

0:06:50.137529
0:08:55.439963
0:06:19.179093
0:07:16.680906
0:31:55.778010
0:16:56.940836

Is there a Python function or set of commands that will let me add all of these values together?

I initially "build" these values with the following code:

optimize_times = []
starting_time=(datetime.now())
ending_time=(datetime.now())
optimize_times.append(str(ending_time-starting_time))

Yes, timedelta, but it's not clear to me why you call str() on your results. — roganjosh
– roganjosh, Commented Nov 20, 2018 at 21:24
Without using the str function the value resulted in a timedelta function being output — user3299633
– user3299633, Commented Nov 20, 2018 at 21:37

jpp · Accepted Answer · 2018-11-20 21:43:59Z

1

You can use datetime.timedelta from the standard library:

from datetime import timedelta

L = ['0:06:50.137529', '0:08:55.439963', '0:06:19.179093',
     '0:07:16.680906', '0:31:55.778010', '0:16:56.940836']

def str_to_td(x):
    hrs, mins, sec_micro = x.split(':')
    secs, msecs = map(int, sec_micro.split('.'))
    return timedelta(hours=int(hrs), minutes=int(mins), seconds=secs, microseconds=msecs)

res = sum(map(str_to_td, L), timedelta())

# datetime.timedelta(0, 4694, 156337)

Note the output of this is a timedelta object. If this isn't the format your desire, you'll need to convert back to a string with additional logic.

answered Nov 20, 2018 at 21:43

jpp

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1 Comment

user3299633 Over a year ago

Thank you, that's exactly what I needed.

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