Datetime differences on python

Question

I have DateTime, from string I convert them on IS0 format example. ISODate("2016-06-24T09:07:31.097Z")

I want to find the differences between them using python, so I did this:

string_older = "2016-05-18T20:53:43.776456"
string_young = "2016-05-16T20:53:43.776456"
datetime_older = datetime.datetime.strptime(string_older, "%Y-%m-%dT%H:%M:%S.%f") //date on ISO format
datetime_young = datetime.datetime.strptime(string_young, "%Y-%m-%dT%H:%M:%S.%f") //date on ISO format
a = time.mktime(datetime_older)
b = time.mktime(datetime_young)
diff = a - b
seconds = int(diff) % 60

But this gives this error TypeError: argument must be 9-item sequence, not datetime.datetime at this line time.mktime(datetime_older). I don't know how to fix it? Please help.

I don't understand why you are calling time.mktime at all. You have datetimes already, you can subtract them from each other. — Daniel Roseman
– Daniel Roseman, Commented Jun 29, 2016 at 12:52
I thought to convert it to time and then subtract for find difference on seconds, I didn't know that I can subtract dates directly — Babel
– Babel, Commented Jun 29, 2016 at 12:54

Jérôme · Accepted Answer · 2016-06-29 12:56:00Z

3

Subtracting both datetimes gives you a timedelta. To get the difference expressed in seconds, call its total_seconds method.

string_older = "2016-05-18T20:53:43.776456"
string_young = "2016-05-16T20:53:43.776456"
datetime_older = datetime.datetime.strptime(string_older, "%Y-%m-%dT%H:%M:%S.%f") //date on ISO format
datetime_young = datetime.datetime.strptime(string_young, "%Y-%m-%dT%H:%M:%S.%f")

timedelta = datetime_older - datetime_young
seconds = timedelta.total_seconds()

timedelta.total_seconds()

Return the total number of seconds contained in the duration. Equivalent to (td.microseconds + (td.seconds + td.days * 24 * 3600) * 10**6) / 10**6 computed with true division enabled.

answered Jun 29, 2016 at 12:56

Jérôme

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Comments

Abhishake Gupta · Accepted Answer · 2016-06-29 13:04:38Z

0

I think you need this; there is no need to use time.mktime() as you already have datetimes.

import time, datetime
string_older = "2016-05-18T20:53:43.776456"
string_young = "2016-05-16T20:53:43.776456"

datetime_older = datetime.datetime.strptime(string_older, "%Y-%m-  %dT%H:%M:%S.%f")
datetime_young = datetime.datetime.strptime(string_young, "%Y-%m-%dT%H:%M:%S.%f")

c = datetime_older - datetime_young
print(divmod(c.days * 86400 + c.seconds, 60) ) # minutes, seconds

answered Jun 29, 2016 at 13:04

Abhishake Gupta

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2 Comments

Jérôme Over a year ago

Why not use total_seconds? (See my answer)

Abhishake Gupta Over a year ago

we can use total_seconds. This is just an another way of doing the same thing.

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