Como formatar um string para um int nesse exemplo?

print("attempt {} of {}", format(round, total_attempts)) TypeError: format() argument 2 must be str, not int

Como declaro o argumento 2 em um valor inteiro? tentei alterar a variável, mas dá erro de syntax

print("****************************")
print('Welcome to the guessing game')
print("****************************")

secret_number = 42
total_attempts = 3
round = 1


while (round <= total_attempts):
    print("attempt {} of {}", format(round, total_attempts))
    guess_str = input("Choose a number: ")
    print("You typed: ", guess_str)
    guess = int(guess_str)

    right = guess == secret_number
    higher = guess > secret_number
    lower = guess < secret_number

    if right:
        print("You are right!")
    else:
        if(higher):
            print("You're wrong! your number was higher than the secret number")
        elif(lower):
            print("You are wrong!your number is lower than the secret number")

    round = round + 1

print("Game over")