Hangman game using random and indexing

hangman.py

import random

HANGMANPICS = ['''
    +---+
    |   |
        |
        |
        |
        |
   =========''','''

    +---+
    |   |
    o   |
        |
        |
        |
   =========''','''

    +---+
    |   |
    o   |
    |   |
        |
        |
   =========''','''

    +---+
    |   |
    o   |
   /|   |
        |
        |
   =========''','''

    +---+
    |   |
    o   |
   /|\  |
        |
        |
   =========''','''

    +---+
    |   |
    o   |
   /|\  |
   /    |
        |
   ========''','''

    +---+
    |   |
    o   |
   /|\  |
   / \  |
        |
   ========''']

words = "ape cat dog baboon elephant giraffe apple coconut monkey rubik mice mouse pineapple android apple house fence python grail zerg protoss terran llama fire policeman mamerto smad zebra lion luffy nigga universidad".split()

def getRandomWord(wordList):
    '''
    This function returns a random word from the passed list of strings
    '''
    wordIndex = random.randint(0, len(wordList)-1)
    return wordList[wordIndex]

def displayBoard(HANGMANPICS, missedLetters, correctLetters, secretWord):
    print(HANGMANPICS[len(missedLetters)])
    print()

    print('Missed letters', end = ' ')
    for letter in missedLetters:
        print(letter, end = ' ')
    print()

    blanks = "__"*len(secretWord)

    for i in range(len(secretWord)): #Replace blanks with correctly guessed letters
        if secretWord[i] in correctLetters:
            blanks = blanks[:i] + secretWord[i] + blanks[i+1:]

    for letter in blanks: #show the secret word with spaces in between each letter
        print(letter, end = ' ')
    print()

def getGuess(alreadyGuessed):
    '''
    Returns the letter the player entered. This function makes sure the player
    entered a single letter and not something else
    '''
    while True:
        print("Guess a letter.")
        guess = input()
        guess = guess.lower()
        if len(guess) != 1:
            print("Please enter a single letter.")
        elif guess in alreadyGuessed:
            print("You have already guessed that letter. Choose again.")
        elif guess not in "abcdefghijklmnopqrstuvwxyz":
            print("Please enter a LETTER")
        else:
            return guess

def playAgain():
    '''
    This function returns true if the player wants to play again,
    otherwise it returns false
    '''
    print("Do you want to play again? (yes or no)")
    return input().lower().startswith('y')

print("H A N G M A N")
missedLetters = ''
correctLetters = ''
secretWord = getRandomWord(words)
gameIsDone = False

while True:
    displayBoard(HANGMANPICS, missedLetters, correctLetters, secretWord)

    #Let the player type in a letter.
    guess = getGuess(missedLetters + correctLetters)

    if guess in secretWord:
        correctLetters = correctLetters + guess

        #Check if the player has won
        foundAllLetters = True
        for i in range(len(secretWord)):
            if secretWord[i] not in correctLetters:
                foundAllLetters = False
                break
        if foundAllLetters:
            print("Yes, the correct word is ", secretWord," you have won")
            gameIsDone = True
    else:
        missedLetters = missedLetters + guess

        #Checks if the player have guessed to many times and lost
        if len(missedLetters) == len(HANGMANPICS)-1:
            displayBoard(HANGMANPICS,missedLetters,correctLetters,secretWord)
            print("You have run out of guesses!\nAfter ",str(len(missedLetters)),"missed guesses and ", str(len(correctLetters))," correct guesses, the word was ","'", secretWord,"'")
            gameIsDone = True

        #Ask the player if they want to play again (but only if the game is done)
        if gameIsDone:
            if playAgain():
                missedLetters = ''
                correctLetters = ''
                gameIsDone = False
                secretWord = getRandomWord(words)
            else:
                break