Created
October 1, 2019 11:13
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A python script for discovering if a date is a palindromic date, when the next palindromic date is and when this date will be planidromic next.
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from datetime import datetime, timedelta | |
import datedelta | |
def checkIfPalindrome(string): | |
length = len(string) | |
even = length%2==0 | |
for i in range(int(length/2)): | |
if string[i] != string[length-1 - i]: | |
return False | |
return True | |
def checkIfNumericPalindrome(number): | |
return checkIfPalindrome(str(number)) | |
def checkIfDateIsPalindrome(date): | |
# day - month - year, no 0 padding | |
if checkIfPalindrome('{d.day}{d.month}{d.year}'.format(d=date)): | |
return True, '{d.day}/{d.month}/{d.year}' | |
# day - month - year, only month 0 padding | |
elif checkIfPalindrome('{d.day}{d.month:02}{d.year}'.format(d=date)): | |
return True, '{d.day}/{d.month:02}/{d.year}' | |
# day - month - year, both 0 padding | |
elif checkIfPalindrome('{d.day:02}{d.month:02}{d.year}'.format(d=date)): | |
return True, '{d.day:02}/{d.month:02}/{d.year}' | |
# month - day - year, no 0 padding | |
elif checkIfPalindrome('{d.month}{d.day}{d.year}'.format(d=date)): | |
return True, '{d.month}/{d.day}/{d.year}' | |
# month - day - year, only day 0 padding | |
elif checkIfPalindrome('{d.month}{d.day:02}{d.year}'.format(d=date)): | |
return True, '{d.month}/{d.day:02}/{d.year}' | |
# month - day - year, both 0 padding | |
elif checkIfPalindrome('{d.month:02}{d.day:02}{d.year}'.format(d=date)): | |
return True, '{d.month:02}/{d.day:02}/{d.year}' | |
else: | |
return False, '' | |
# Returns the next date that is a palindrome | |
def getNextPalindromeDate(date): | |
isPalindrome = False | |
while not isPalindrome: | |
date += timedelta(days=1) | |
isPalindrome, dateformat = checkIfDateIsPalindrome(date) | |
return dateformat.format(d=date), dateformat | |
# Returns the year when the date is a palindrome next | |
def getNextPalindromeYear(date): | |
isPalindrome = False | |
while not isPalindrome: | |
date += datedelta.YEAR | |
isPalindrome, dateformat = checkIfDateIsPalindrome(date) | |
return dateformat.format(d=date), dateformat | |
# Testing | |
date = datetime.strptime(input("Date (d/m/y):"),'%d/%m/%Y') | |
print('Is palindrome?:', checkIfDateIsPalindrome(date)) | |
print('Next palindrome date:', getNextPalindromeDate(date)) | |
print('Next time this date is a palindrome:', getNextPalindromeYear(date)) |
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