"""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
from inlist import make_word_list, in_bisect
def interlock(word_list, word):
"""Checks whether a word contains two interleaved words.
word_list: list of strings
word: string
"""
evens = word[::2]
odds = word[1::2]
return in_bisect(word_list, evens) and in_bisect(word_list, odds)
def interlock_general(word_list, word, n=3):
"""Checks whether a word contains n interleaved words.
word_list: list of strings
word: string
n: number of interleaved words
"""
for i in range(n):
inter = word[i::n]
if not in_bisect(word_list, inter):
return False
return True
if __name__ == '__main__':
word_list = make_word_list()
for word in word_list:
if interlock(word_list, word):
print(word, word[::2], word[1::2])
for word in word_list:
if interlock_general(word_list, word, 3):
print(word, word[0::3], word[1::3], word[2::3])
