Number of days between two dates/ date differences in Python

To find the number of days between two given dates or to find the difference between two dates in Python. This function generally needs in many case in most of the program.

from datetime import datetime

def days_between(d1, d2):
    d1 = datetime.strptime(d1, "%Y-%m-%d")
    d2 = datetime.strptime(d2, "%Y-%m-%d")
    return abs((d2 - d1).days)

Example:

>>> from datetime import datetime
>>> d1 = '2014-05-10'
>>> d2 = '2014-05-05'
>>> d1 = datetime.strptime(d1, "%Y-%m-%d")
>>> d2 = datetime.strptime(d2, "%Y-%m-%d")
>>> no_of_days = abs((d2 - d1).days)
>>> no_of_days
5 

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