如何在python中将字符串输入转换为int？

def tie():
    guess = random.randint(1,100)
    opp = random.randint(0,100)
    number = input(guess);
    diff1 = (guess - opp)**2
    diff2 = (guess - number)**2
    if diff2 > diff1:
        print("You won the tie breaker!")
    elif diff2 < diff1:
        print("You lose the tie breaker")
blackjack();

这是我的代码。我希望能够找出哪个人更接近随机数。 Opp（对手）或数字（我自己）。但我得到一个错误，说字符串不能用作int。帮助任何人？

This is my code. I want to be able to find out which person is closer to the random number. Opp (opponent) or number(myself). But I get an error saying string cant be used as int. Help anyone?