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. For more details, refer https://amalgjose.com/2015/02/19/python-code-for-calculating-the-difference-between-two-time-stamps/

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)

How to Write a Python script to display the examination schedule. Extract the exam date from user and calculate the days left for the examination from current date.
output should be like this
Exam date: (2016/12/30)
Current date: (2016/12/15)
Expected output: 15 days

from datetime import date
examdate =  date(Year, Month, Data)
currentdate = datetime.datetime.now().date()

difference = relativedelta.relativedelta(today, yr_p)

print(difference.days)