Python3 尝试/排除块

Question

谁能帮我理解以下问题...

我在简单的猜数字游戏中执行 try/except 块时遇到问题。如果我删除初始输入的整数部分，包含我的错误处理的函数可以正常工作。但是如果我这样做，游戏的其余部分就不起作用，因为根据我的理解，Python3 接受输入并将其存储为字符串。那么我怎样才能让我的异常执行呢？非常感谢任何帮助。

谢谢，

# number game
import random




print ("Welcome to the guessing number game!\n\n")

winning_number= random.randrange(1, 11)
guess = int(input("Can you guess the lucky number.\nHint it's between 1 and 10!\n"))


def is_number(guess):
    try:
        int(guess)
    except ValueError:
        print ('You need to type a number\n')
        guess = int((input("Please input a number\n")))
        game(guess)



def compare(guess):
    if guess > winning_number:
        print ("Wrong, you're guess is too high.\n")
        guess = int(input("Guess againn\n"))
        game(guess)
    else:
        print ("Wrong, you're guess is too low.\n")
        guess = int(input("Guess again\n"))
        game(guess)



def game(guess):
    is_number(guess)
    if guess == winning_number:
        print ("You win!, You guessed the number!")
    else:
        compare(guess)

game(guess)

这是我输入除整数以外的任何内容时得到的结果...

欢迎来到猜数字游戏！

你能猜出幸运数字吗？ 提示它在 1 到 10 之间！ F 回溯（最近一次通话最后）： 文件“C:/Users/mickyj209/PycharmProjects/Practice/NumberGuess.py”，第 10 行，在 guess = int(input("你能猜出幸运数字吗？\n提示它在 1 到 10 之间！\n")) ValueError: int() 以 10 为底的无效文字：'f'

进程以退出代码 1 结束

Answer 1

你忘了保存那个时间的值（guess = int(guess)），你没有在return那里做任何事情，你只是让程序运行这个函数，但没有根据结果做出决定。您在异常处理中还有一个int(input(...，它本身可能会生成一个不会被捕获的异常。最初的猜测也不在try 块中。

你可以重构这个程序：

def game():

    print ("Welcome to the guessing number game!\n\n")

    winning_number = random.randrange(1, 11)
    print("Can you guess the lucky number?\nHint: it's between 1 and 10!\n")
    while 1:
        try:
            guess = int(input("Please input a number\n"))
        except ValueError:
            continue
        if guess > winning_number:
            print('Wrong - your guess is too high.')
        elif guess < winning_number:
            print('Wrong - your guess is too low.')
        else:
            print('You win! You guessed the number!')
            break