replace a character according to its index until the word does not contain '

I am trying to create a function that takes a word housed in a variable and modifies it according to the letter that I am entering until the variable does not contain any '_'. The code does not give any type of error, it simply does not work even though if I try line by line if it fulfills its function. any suggestion?

def reveal_word():
    string = '____'
    word = 'cat'
    while '_' in string:
        letter = input('Enter your letter: ')
        for index in string:
            index = word.find(letter)
            string[index].replace('_',letter)
        return string 
print(reveal_word())

CodePudding user response：

def reveal_word():
    word = "capybara"
    string = "_" * len(word)
    while "_" in string:
        print(string)
        char = input("Enter your letter: ")[0] # [0] to get the first letter
        idx = word.find(char)
        if idx != -1:
            word = word[:idx]   "_"   word[idx   1 :]
            string = string[:idx]   char   string[idx   1 :]
    return string


print(reveal_word())

CodePudding user response：

Here is a somewhat simpler solution. It uses a list of characters in the word and drops matched characters from that list until the list is empty:

def reveal_word():
    word = 'cat'
    string = list(word)
    
    while string:
        letter = input('Enter your letter: ')
        if letter in string:
            string = list(filter(lambda val: val !=  letter, string))

    return word 
print(reveal_word())

CodePudding user response：

Here's a sample with a slightly different twist. In this example if a character exists more than once in the word to guess, every location will be updated with that character.

def reveal_word():
    string = '________'
    word   = 'Hercules'
    while '_' in string:
        letter = input('Enter your letter: ')
        for index in range(0, len(string)):
            if (string[index] == '_'):
                if (word[index] == letter):
                    temp = list(string)
                    temp[index] = letter
                    string = "".join(temp)
        print('String: ', string)
    return string 
print(reveal_word())

Here is some terminal output.

Enter your letter: e
String:  _e____e_
Enter your letter: H
String:  He____e_
Enter your letter: r
String:  Her___e_
Enter your letter: c
String:  Herc__e_
Enter your letter: u
String:  Hercu_e_
Enter your letter: l
String:  Hercule_
Enter your letter: s
String:  Hercules
Hercules

Just another take on the puzzle.

Regards.