How to get the sum of timedelta in Python?

Question

Python: How to get the sum of timedelta?

Eg. I just got a lot of timedelta object, and now I want the sum. That's it!

Answer 1

To add timedeltas you can use the builtin operator +:

result = timedelta1 + timedelta2

To add a lot of timedeltas you can use sum:

result = sum(timedeltas, datetime.timedelta())

Or reduce:

import operator
result = reduce(operator.add, timedeltas)

Answer 2

datetime combine method allows you to combine time with a delta

datetime.combine(date.today(), time()) + timedelta(hours=2)

timedelta can be combined using usual '+' operator

>>> timedelta(hours=3) 
datetime.timedelta(0, 10800)
>>> timedelta(hours=2)
datetime.timedelta(0, 7200)
>>>
>>> timedelta(hours=3) + timedelta(hours=2)
datetime.timedelta(0, 18000)
>>> 

You can read the datetime module docs and a very good simple introduction at

• http://www.doughellmann.com/PyMOTW/datetime/