Python 2.6.5: Divide timedelta with timedelta

Question

I'm trying to divide one timedelta object with another to calculate a server uptime:

>>> import datetime
>>> installation_date=datetime.datetime(2010,8,01)
>>> down_time=datetime.timedelta(seconds=1400)
>>> server_life_period=datetime.datetime.now()-installation_date
>>> down_time_percentage=down_time/server_life_period
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for /: 'datetime.timedelta' 
           and 'datetime.timedelta'

I know this has been solved in Python 3.2, but is there a convenient way to handle it in prior versions of Python, apart from calculating the number of microseconds, seconds and days and dividing?

Thanks,

Adam

possible duplicate of [How can I perform divison on a datetime.timedelta in python?](http://stackoverflow.com/questions/865618/how-can-i-perform-divison-on-a-datetime-timedelta-in-python) — Mechanical snail, Sep 13 '12 at 14:37

score 34 · Accepted Answer · edited Jun 24 '14 at 17:37

34

In Python ≥2.7, there is a .total_seconds() method to compute the total seconds contained in the timedelta:

>>> down_time.total_seconds() / server_life_period.total_seconds()
0.0003779903727652387

Otherwise, there is no way but to compute the total microseconds (for versions < 2.7)

>>> def get_total_seconds(td): return (td.microseconds + (td.seconds + td.days * 24 * 3600) * 1e6) / 1e6
... 
>>> get_total_seconds(down_time) / get_total_seconds(server_life_period)
0.0003779903727652387

edited Jun 24 '14 at 17:37

Engineer2021

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answered Sep 12 '10 at 12:51

kennytm

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@Adam: The 2nd method works on 2.6. (Of course it is the just that "apart from" solution.) – kennytm Sep 12 '10 at 13:20
@kennytm The second method was great for 2.6. You need to divide td.microseconds by 1000000 though, or the calculation can be off significantly. – Andrew Riker Oct 11 '16 at 17:25
@AndrewRiker There is already a `/ 1e6` at the end of the function? – kennytm Oct 11 '16 at 17:36
@kennytm thanks for the update. Missed the right scroll in my browser. – Andrew Riker Oct 11 '16 at 19:00

Python 2.6.5: Divide timedelta with timedelta

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