如何在 python 3.x 中用 position 替换字符串中的字母

Question

I am trying to create a 'hangman' game. And for that I need to take the word the player is trying to guess, and turn all the letters they haven't yet guessed into " _ "

So let's say I have:

letters_guessed = [q, r, u, a, p]
secret_word = "dragon"

How can I turn it into: _ r a _ _ _ ?

Answer 1

Several possible solutions here, one being:

letters_guessed = ["q", "r", "u", "a", "p"]

secret_word = "dragon"

output = ""
for char in secret_word:
    if char in letters_guessed:
        x = char
    else:
        x = "_"
    output += x

print(output)
# Output:  _ra___

Put it in a function afterwards:

def hangman(word, guessed):
    output = ""
    for char in word:
        if char in guessed:
            x = char
        else:
            x = "_"
        output += x
    return output

---

Alternatively, you can use a list comprehension altogether:

letters_guessed = ["q", "r", "u", "a", "p"]
secret_word = "dragon"
secret_list = "".join([char if char in letters_guessed else "_" 
                       for char in list(secret_word)])
print(secret_list)