This is a very simple python code snippet for calculating the difference between two dates or timestamps. This will calculate the difference in terms of number of years, months, days, hours, minutes etc.

DateDifference.py

__author__ = 'Amal G Jose'

from datetime import datetime
from dateutil import relativedelta

##Aug 7 1989 8:10 pm
date_1 = datetime(1989, 8, 7, 20, 10)

##Dec 5 1990 5:20 am
date_2 = datetime(1990, 12, 5, 5, 20)

#This will find the difference between the two dates
difference = relativedelta.relativedelta(date_2, date_1)

years = difference.years
months = difference.months
days = difference.days
hours = difference.hours
minutes = difference.minutes

print "Difference is %s year, %s months, %s days, %s hours, %s minutes " %(years, months, days, hours, minutes)