Python Hangman Replacing "_" with letters.

[gontajones]

I did it starting the word 'apple' as a list ['a','p','p','l','e'] and every time a letter is a match I change it for '*'.
Try by yourself first and then I'll post my solution.

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My solution:

def checkLetter(letter, word, guess_word):

    for c in word:
        if c == letter:
            guess_word[word.index(c)] = c
            word[word.index(c)] = '*'

    return guess_word


word = list('apple')
guess_word = ['_' for x in word]

print(guess_word)
while '_' in guess_word:
    guess = input('Letter: ')
    print(checkLetter(guess, word, guess_word))