Question

我是Python的新手，并且正在进行多项选择测验，该测验从文件中读取问题并保留分数然后写入文件。

在我将验证添加到用户给出的答案之前，一切都运行良好。现在，当我运行该程序时，它说我的答案是错误的！

我做了什么？

适用的版本1

def inputandoutput():
    questions_file = open_file("questions.txt", "r")
    title = next_line(questions_file)
    welcome(title)
    score = 0

    # get first block
    category, question, answers, correct, explanation = next_block(questions_file)
    while category:
        # ask a question
        print(category)
        print(question)
        for i in range(4):
            print("\t", i + 1, "-", answers[i])

        # get answer
        answer = input("What's your answer?: ")

        # check answer
        if answer == correct:
            print("\nRight!", end=" ")
            score += 1
        else:
            print("\nWrong.", end=" ")
        print(explanation)
        print("Score:", score, "\n\n")

        # get next block
        category, question, answers, correct, explanation = next_block(questions_file)


    questions_file.close()

版本2说我现在有错误的答案

def inputandoutput():
    questions_file = open_file("questions.txt", "r")
    title = next_line(questions_file)
    welcome(title)
    score = 0

    # get first block
    category, question, answers, correct, explanation = next_block(questions_file)
    while category:
        # ask a question
        print(category)
        print(question)
        for i in range(4):
            print("\t", i + 1, "-", answers[i])


        # get answer and validate
        while True:
            try:
                answer = int(input("What's your answer?: "))
                if answer in range (1,5):
                    break
            except ValueError:
                print ("That's not a number")
            else:
                print ("the number needs to be between 1 and 4, try again ")


        # check answer
        if answer == correct:
            print("\nRight!", end=" ")
            score += 1
        else:
            print("\nWrong.", end=" ")
        print(explanation)
        print("Score:", score, "\n\n")

        # get next block
        category, question, answers, correct, explanation = next_block(questions_file)

帮助？

Answer 1

在原始版本中，answer是一个字符串;在您的新版本中，它是int。

如果您将try正文更改为：

answer = input("What's your answer?: ")
if int(answer) in range (1,5):

然后你仍然可以抓住ValueError但是留下answer一个字符串。

在测验中添加验证以回答错误答案

1 个答案: