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"""This module contains a code example related to

Think Python, 2nd Edition

by Allen Downey

http://thinkpython2.com

Copyright 2015 Allen Downey

License: http://creativecommons.org/licenses/by/4.0/

"""

from __future__ import print_function, division

def has_palindrome(i, start, length):

"""Checks if the string representation of i has a palindrome.

i: integer

start: where in the string to start

length: length of the palindrome to check for

"""

s = str(i)[start:start+length]

return s[::-1] == s

def check(i):

"""Checks if the integer (i) has the desired properties.

i: int

"""

return (has_palindrome(i, 2, 4) and

has_palindrome(i+1, 1, 5) and

has_palindrome(i+2, 1, 4) and

has_palindrome(i+3, 0, 6))

def check_all():

"""Enumerate the six-digit numbers and print any winners.

"""

i = 100000

while i <= 999996:

if check(i):

print(i)

i = i + 1

print('The following are the possible odometer readings:')

check_all()

print()