ps3_hangman.py

import random
import string

WORDLIST_FILENAME = "words.txt"

def loadWords():
    """
    Returns a list of valid words. Words are strings of lowercase letters.
    
    Depending on the size of the word list, this function may
    take a while to finish.
    """
    print("Loading word list from file...")
    # inFile: file
    inFile = open(WORDLIST_FILENAME, 'r')
    # line: string
    line = inFile.readline()
    # wordlist: list of strings
    wordlist = line.split()
    print("  ", len(wordlist), "words loaded.")
    return wordlist

def chooseWord(wordlist):
    """
    wordlist (list): list of words (strings)

    Returns a word from wordlist at random
    """
    return random.choice(wordlist)


# -----------------------------------

# Load the list of words into the variable wordlist
# so that it can be accessed from anywhere in the program
wordlist = loadWords()

def isWordGuessed(secretWord, lettersGuessed):
    '''
    secretWord: string, the word the user is guessing
    lettersGuessed: list, what letters have been guessed so far
    returns: boolean, True if all the letters of secretWord are in lettersGuessed;
      False otherwise
    '''
    
    for ch in secretWord:
        if ch not in lettersGuessed:
            return False
        
    return True



def getGuessedWord(secretWord, lettersGuessed):
    '''
    secretWord: string, the word the user is guessing
    lettersGuessed: list, what letters have been guessed so far
    returns: string, comprised of letters and underscores that represents
      what letters in secretWord have been guessed so far.
    '''
    
    ans=""
    for ch in secretWord:
        if ch in lettersGuessed:
            ans+=ch
        else:
            ans+='_'
            
    return ans


def getAvailableLetters(lettersGuessed):
    '''
    lettersGuessed: list, what letters have been guessed so far
    returns: string, comprised of letters that represents what letters have not
      yet been guessed.
    '''
    
    abc_list=list(string.ascii_lowercase)
    
    for ch in lettersGuessed:
        abc_list.remove(ch)
    
    return ''.join(abc_list)
    

def hangman(secretWord):
    '''
    secretWord: string, the secret word to guess.

    Starts up an interactive game of Hangman.

    * At the start of the game, let the user know how many 
      letters the secretWord contains.

    * Ask the user to supply one guess (i.e. letter) per round.

    * The user should receive feedback immediately after each guess 
      about whether their guess appears in the computers word.

    * After each round, you should also display to the user the 
      partially guessed word so far, as well as letters that the 
      user has not yet guessed.

   
    '''
   
    lettersGuessed=[]
    mistakesMade=0
    
    print("Welcome to the game, Hangman!")
    print("I am thinking of a word that is "+str(len(secretWord))+" letters long.")
    print("-------------")
    while mistakesMade < 8:
        
        if isWordGuessed(secretWord,lettersGuessed):
            print("Congratulations, you won!")
            break
        
        print("You have "+str(8-mistakesMade)+" guesses left.")
        print("Available letters: "+getAvailableLetters(lettersGuessed))
        x=input("Please guess a letter: ")
        x=x.lower()
        
        if x in lettersGuessed:
            print("Oops! You've already guessed that letter: "+getGuessedWord(secretWord,lettersGuessed))
        else:
            if x in secretWord:
                lettersGuessed.append(x)
                print("Good guess: "+getGuessedWord(secretWord,lettersGuessed))
            else:
                lettersGuessed.append(x)
                print("Oops! That letter is not in my word: "+getGuessedWord(secretWord,lettersGuessed))
                mistakesMade+=1
        
        print("-------------")
        
    if mistakesMade==8:
        print("Sorry, you ran out of guesses. The word was "+secretWord+".")
                





secretWord = chooseWord(wordlist).lower()
hangman(secretWord)