教材上输入Python程序不运行，不清楚问题在哪里?

sxczcpf

#This is a guess the number game 这是一个猜数字游戏
import random
secretNumber = random.randint(1,20)#输入一个1-20的整数
print('I am thinking of a number between 1 and 20.')
#Ask the Player to guess 6 times.
for guessesTaken in range(1,7):
    print('Take a guess.')
   
    guess = input('请输入你的猜测：')
    if guess < secretNumber:
           print('Your guess is too low.')
    elif guess > secretNumber:
           print('Your guess is too high.')
    else:
        break # This condition is the correct guess!
if guess == secretNumber:
   print('Good job! You guessed my number in ' + str(guessesTaken) + ' guesses!')
else:
   print('Nope.The number I was thinking of was ' + str(secretNumber))

sxczcpf

还是不行，走到这就不动了！没办法输入数字！

I am thinking of a number between 1 and 20.
Take a guess.
请输入你的猜测：