Question

需要帮助学校的项目，我在下面的代码行中出现缩进错误：

                     #First question
while numberofquestions <10:
    operations = ['x', '-', '+']
    operation = random.choice(operations)
    number1 = random.randrange(0,10)
    number2 = random.randrange(0,10)
    if operation == '+':
        answer = number1 + number2
    elif operation == '-':
        answer = number1 - number2
    elif operation == 'x':
        answer = number1 * number2
    while True:
        try:
                user_answer = input("What is " + str(number1) + " " + operation + " " + str(number2) + "?")
                user_answer = float(user_answer)
        except ValueError:
                print("Sorry that was an incorrect input, please try again.")
            else:
                break
    if user_answer == answer:
        print("Well Done! You got it correct!")
        score = score+1
    else:
        print("Sorry you got that wrong")
    print ("***********-*-*-*-Your score so far is-*-*-*-*********** ")
    print (score)
    numberofquestions = numberofquestions+1
print ("Well done, you have completed your test! Your final score was...")
print (score)

单个错误本身就在行中：

while True:
        try:

我得到的错误是＆＃34; unindent与任何外部缩进级别都不匹配＆＃34;

这是一个包含我的整个代码的链接，有助于：http://paste.ubuntu.com/17167322/

Answer 1

这些行：

while True:
        try:
                user_answer = input("What is " + str(number1) + " " + operation + " " + str(number2) + "?")
                user_answer = float(user_answer)
        except ValueError:
                print("Sorry that was an incorrect input, please try again.")
            else:
                break

有错误的缩进。

两条user_answer行有一个额外的缩进，而else块没有匹配的if或try/except块。

Answer 2

始终将编辑器设置为CONVERT TAB TO WHITESPACE 。

永远不会将标签保存为缩进，大多数处理缩进的解析器都不知道如何处理标签和空格的混合。对于处理缩进语法（python，yaml等）的所有新开发人员来说，这是最常见的问题

我通过将您的代码复制到Notepad ++，尽快发现问题，打开＆＃34;显示所有字符＆＃34;。从第67行到第74行，您使用空格作为缩进，而其余的则使用TAB。取决于编辑器，有些人将该功能称为＆＃34;用空格替换标签＆＃34;，＆＃34;将标签保存为空格＆＃34; ，＆＃34;将标签翻译为空格＆＃34;

    while True:
    try:
            ....
    except ValueError:
            print("Sorry that was an incorrect input, please try again.")
    ###### Here is indentation error culprit, mostly due to tab/space mix.
        else:
            break

多次重新排列代码后，我一直收到相同的缩进错误

2 个答案: