如何修复Python 'Question' object is not subscriptable类型错误

错误根因 #

你遇到的TypeError: 'Question' object is not subscriptable由代码中几处核心问题直接导致：

• 基础语法缺失：存储题目的question_data字典列表末尾没有写闭合的]，会直接导致代码结构解析异常。
• 列表逻辑错误：你写的question_bank = (question_data)没有创建新的空列表，只是把原始存字典的question_data列表直接赋值给了question_bank，二者指向内存里同一个列表。紧接着你在遍历question_data的同时，不断往同个列表里追加Question类实例，for循环按索引遍历到超出原始题目长度的位置时，取到的元素就不再是字典，而是你刚追加的Question对象。字典支持["key"]形式的下标取值，但自定义类实例默认不支持这种下标访问（也就是报错信息里的not subscriptable），这就是报错的直接触发原因。
• 方法调用错误：最后一行写的quiz.next_question只是获取了方法对象，没有加括号()，根本不会执行方法内部的出题逻辑，就算修复了前面的问题，程序也不会正常运行。
• 功能逻辑缺失：现有QuizBrain类没有答案校验、计分、遍历全部题目的逻辑，只能执行单次出题操作，无法完成完整测验流程。

修复后完整可运行代码 #

# 补全question_data的闭合括号
question_data = [
    {"text": "A slug's blood is green.", "answer": "True"},
    {"text": "The loudest animal is the African Elephant.", "answer": "False"},
    {"text": "Approximately one quarter of human bones are in the feet.", "answer": "True"},
    {"text": "The total surface area of a human lungs is the size of a football pitch.", "answer": "True"},
    {"text": "In West Virginia, USA, if you accidentally hit an animal with your car, you are free to take it home to eat.", "answer": "True"},
    {"text": "In London, UK, if you happen to die in the House of Parliament, you are entitled to a state funeral.", "answer": "False"},
    {"text": "It is illegal to pee in the Ocean in Portugal.", "answer": "True"},
    {"text": "You can lead a cow down stairs but not up stairs.", "answer": "False"},
    {"text": "Google was originally called 'Backrub'.", "answer": "True"},
    {"text": "Buzz Aldrin's mother's maiden name was 'Moon'.", "answer": "True"},
    {"text": "No piece of square dry paper can be folded in half more than 7 times.", "answer": "False"},
    {"text": "A few ounces of chocolate can to kill a small dog.", "answer": "True"}
]

class Question:
    def __init__(self, q_text, q_answer):
        self.text = q_text
        self.answer = q_answer

class QuizBrain:
    def __init__(self, q_list):
        self.question_number = 0
        self.question_list = q_list
        self.score = 0

    # 判断是否还有未答题目
    def still_has_questions(self):
        return self.question_number < len(self.question_list)

    def next_question(self):
        current_question = self.question_list[self.question_number]
        self.question_number += 1
        user_answer = input(f"Q.{self.question_number}: {current_question.text} (True/False):  ")
        self.check_answer(user_answer, current_question.answer)

    # 校验答案并更新分数
    def check_answer(self, user_ans, correct_ans):
        if user_ans.lower() == correct_ans.lower():
            self.score += 1
            print("回答正确！")
        else:
            print("回答错误。")
        print(f"当前得分：{self.score}/{self.question_number}\n")

# 初始化为空列表，不要直接绑定原始题目字典列表
question_bank = []
for question in question_data:
    question_text = question["text"]
    question_answer = question["answer"]
    new_question = Question(question_text, question_answer)
    question_bank.append(new_question)

quiz = QuizBrain(question_bank)
# 循环答完所有题目，调用方法必须加括号
while quiz.still_has_questions():
    quiz.next_question()

# 最终结算
print("答题结束！")
print(f"你的最终得分是：{quiz.score}/{len(question_bank)}")

关键修复点说明 #

• 补全question_data列表缺失的闭合方括号，解决基础语法错误
• 将question_bank初始化为独立空列表，遍历原始题目字典时仅把转换后的Question实例追加到该空列表，从根源上避免遍历过程中混入类实例触发的下标取值错误
• 给方法调用补上括号，同时补充答案校验、计分、全题目遍历逻辑，让测验流程可以完整运行
• 答案判断时统一转小写，避免用户输入大小写和标准答案不匹配（比如输入true而非True）被误判

内容的提问来源于stack exchange，提问作者Armand Surbakti