Sum a list with timedeltas in Python [duplicate]

Question

I'm struggling with following problem:

How can I sum a list of timedeltas like:

[datetime.timedelta(0, 3600), datetime.timedelta(0, 3600), datetime.timedelta(0, 7200)]

which should result in datetime.timedelta(0, 14400) => 4 hours

Answer 1

Try this,

import datetime
print sum(time_list,datetime.timedelta())

Result:

datetime.timedelta(0, 14400)

Answer 2

Pass datetime.timedelta(0,0) to sum as init value.

import datetime

arr = [datetime.timedelta(0, 3600), datetime.timedelta(0, 3600), datetime.timedelta(0, 7200)]

print(sum(arr, datetime.timedelta(0,0)))

Output:

4:00:00

Answer 3

You can use pandas

    import pandas as pd
    df=pd.DataFrame([datetime.timedelta(0, 3600), datetime.timedelta(0, 3600), datetime.timedelta(0, 7200)])
    df[0].sum()
    Timedelta('0 days 04:00:00')