Replace a certain index of a string in python 3.0 -

Replace a certain index of a string in python 3.0 -

i need replace character in string here catch, string underscores , need able replace underscore corresponds index of word. example:

underscore = '___' word = 'cow' guess = input('input letter guess') #user inputs letter o illustration if guess in word: underscore = underscore.replace('_',guess)

what need fixed underscore gets replaced needs in sec place of 3 underscores. dont want underscore = 'o__' rather '_o_'

you have exclude other characters word, , form new string this

def replacer(word, guess): homecoming "".join('_' if char != guess else char char in word) assert(replacer("cow", "o") == "_o_")

this work if there multiple occurrences of guessed character

assert(replacer("bannana", "n") == "__nn_n_")

the replacer function, iterates word, character character , on each iteration, current character in char variable. then, decide should filled in place of current character, in resulting string with

'_' if char != guess else char

this means that, if current character not equal guessed character, utilize _ otherwise utilize character is. , characters joined "".join.

python string