Comparing dates is quite easy in Python. Dates can be easily compared using comparison operators (like <, >, <=, >=, != etc.). Let’s see how to compare dates with the help of datetime module using Python.
Code #1 : Basic
# Simple Python program to compare dates # importing datetime module import datetime # date in yyyy/mm/dd format d1 = datetime.datetime(2018, 5, 3) d2 = datetime.datetime(2018, 6, 1) # Comparing the dates will return # either True or False print("d1 is greater than d2 : ", d1 > d2) print("d1 is less than d2 : ", d1 < d2) print("d1 is not equal to d2 : ", d1 != d2) |
Output :
d1 is greater than d2 : False d1 is less than d2 : True d1 is not equal to d2 : True
Code #2 : Sorting dates
One of the best ways to sort a group of dates is to store them into a list and apply sort() method. This will sort all the dates which are available in the list. One can store the date class objects into the list using append() method.
# Python program to sort the dates # importing datetime module from datetime import * # create empty list group = [] # add today's date group.append(date.today()) # create some more dates d = date(2015, 6, 29) group.append(d) d = date(2011, 4, 7) group.append(d) # add 25 days to the date # and add to the list group.append(d + timedelta(days = 25)) # sort the list group.sort() # print the dates for d in group: print(d) |
Output :
2011-04-07 2011-05-02 2015-06-29 2018-05-24
Code #3 : Comparing Dates
Compare two date class objects, just like comparing two numbers.
# importing datetime module from datetime import * # Enter birth dates and store # into date class objects d1, m1, y1 = [int(x) for x in input("Enter first" " person's date(DD/MM/YYYY) : ").split('/')] b1 = date(y1, m1, d1) # Input for second date d2, m2, y2 = [int(x) for x in input("Enter second" " person's date(DD/MM/YYYY) : ").split('/')] b2 = date(y2, m2, d2) # Check the dates if b1 == b2: print("Both persons are of equal age") elif b1 > b2: print("The second person is older") else: print("The first person is older") |
Output :
Enter first person's date(DD/MM/YYYY) : 12/05/2017 Enter second person's date(DD/MM/YYYY) : 10/11/2015 The second person is older
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