[Solved] how do I convert an int to a string without an error?

if int(guess[i]) == number[i]:

import random

def generateNumbers():
    numbers = [];
    i = 0
    while i < 4:
        newNumber = random.randint(0, 9)
        if numbers.count(newNumber) == 0:
            numbers.append(newNumber)
            i += 1
    return numbers

def checkValidity(guess):
    if len(guess) != 4:
        print("Your guess does not contain four numbers.")
        return False
    if guess.isdigit() != True:
        print("Your guess is not a number.")
        return False
    i = 0
    while i < 4:
        if guess.count(guess[i]) != 1:
            print("Your number contains a duplicate.")
            return False
        i += 1
    return True

def checkMatch(guess, number):
    bulls = 0
    cows = 0
    i = 0
    while i < 4:
        if guess[i] == number[i]:
            bulls += 1
        elif guess[i] in number:
            cows += 1
        i += 1
    print("Your number contains " + str(bulls) + " and " + str(cows) + " cows.")
    if bulls == 4:
        return True
    else:
        return False

number = generateNumbers()
print(number)
guess = ""
guesses = 0
while guess != "exit":
    print("Enter your guess or 'exit'.")
    guess = input("Guess: ").lower()
    if guess == "exit":
        break
    if checkValidity(guess):
        guesses += 1
        if checkMatch(int(guess), number):
            print("Well done! You guessed the number in " + str(guesses) + " tries.")

if guess[i] == number[i]:

TypeError: 'int' object is not subscriptable