charlesreid1/five-letter-words

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 """ palindromes.py Donald Knuth, Art of Computer Programming, Volume 4 Facsimile 0 Exercise #29 Find all SGB words that are palindromes (kayak) or that are palindrome pairs (regal lager) """ from get_words import get_words from pprint import pprint def is_palindrome(word): test1 = word[0]==word[4] test2 = word[1]==word[3] if(test1 and test2): return True return False def is_palindrome_pair(word1,word2): test0 = word1[0]==word2[4] test1 = word1[1]==word2[3] test2 = word1[2]==word2[2] test3 = word1[3]==word2[1] test4 = word1[4]==word2[0] if(test0 and test1 and test2 and test3 and test4): return True return False if __name__=="__main__": words = get_words() kp = 0 palindromes = [] kpp = 0 palindrome_pairs = [] # Check for palindromes for i in range(len(words)): if(is_palindrome(words[i])): kp += 1 palindromes.append(words[i]) print("-"*40) print("Palindromes: \n") print(", ".join(palindromes)) print("There are {0:d} palindromes.".format(kp)) # Check for palindrome pairs for i in range(len(words)): for j in range(i,len(words)): if(is_palindrome_pair(words[i],words[j])): # Palindromes shouldn't count as palindrome pairs if(words[i] is not words[j]): kpp += 1 palindrome_pairs.append((words[i],words[j])) print("-"*40) print("Palindrome Pairs: \n") for pair in palindrome_pairs: print(", ".join(pair)) print("There are {0:d} palindrome pairs.".format(kpp))