错误异常处理python程序

时间:2013-10-25 02:03:39

标签: python exception error-handling try-catch

print("Welcome to Hangman! Guess the mystery word with less than 6 mistakes!")

words= ['utopian','fairy','tree','monday','blue'] 

while True:
        try:
                i=int(input("Please enter an integer number (0<=number<10) to choose the word in the list: "))
        except ValueError:
                print("Empty input!")
        break
if(words[i]):
        print("The length of the word is: " , len(words[i]))

所以我能够捕获到目前为止我所做的Hangman程序的值错误,但后来发生了。它不仅捕获空输入的值错误,而且如果有人要输入像字母一样的非整数字符,它也会捕获值错误。我希望它同时执行这两个操作,那么如何设置另一个将打印的异常(“请输入一个整数!”)?

该死,我尝试通过添加一些我为该程序提出的其他行来修复该程序,并添加了一个“中断”,但是当我这样做时,我不能错误地说“我”不是定义。现在,如果我将其取出并运行程序,即使用户输入一个整数作为输入,循环也会继续。

1 个答案:

答案 0 :(得分:0)

print("Welcome to Hangman! Guess the mystery word with less than 6 mistakes!")

words= ['utopian','fairy','tree','monday','blue'] 

while True:
    i=input("Please enter an integer number (0<=number<10) to choose the word in the list: ")

    if i in (None, ""):
        print("Null input")
        continue

    try:
        i = int(i)
    except ValueError:
        print("Not valid integer")
        continue
    else:
        if not 0 <= i < 10:
            print("not in valid range of 0<=number<10")
            continue

    break

print("You have entered", i)
print("The word you have chosen is {} letters long".format(words[i]))

input()函数返回一个字符串。如果您想先执行更多检查,那么立即将其转换为int()可能不是正确的行动方案。首先检查它是否为空字符串,然后通过尝试将其转换为int()来确定它是否为整数,然后检查此整数是否在有效范围内。在此结束时,剩余有效整数i

相关问题