How do I replace all characters in a string of unknown length with an underscore

[EmilyM]

I am writing a function that randomly generates a word. I then want to create a new string, call it gameWord, that replaces all the characters in the randomly generated word with _

[twinnyfo]

EmilyM,

Without writing the code for you, you would start by finding the length of the word and then create a string of the same length, in which each character is the underscore.

Please show what you may have tried already.

Twinnyfo

[EmilyM]

I think I got it:

def gameWord(word):
    """
    swaps out the random word with _, to use while the player is guessing
    """
    underscoreWord=word
    i=0
    for i in range (0,len(word)):
        underscoreWord = underscoreWord.replace(word[i]," _ ")
        i=i+1
    #print word
    return underscoreWord