从CSV读取字典列表后，如何去除答案字符串残留引号并格式化选项？

背景与需求 #

开发类闪卡系统，限制仅使用Python基础函数与内置模块，从CSV读取字典列表数据。示例数据结构：

one_dict = [{'Question':'onevalue','Answers':['an_val','two_val','3rd_val'],'Correct Answer':'two_val'}]

核心需求：

• 给答案选项添加序号（如[1] 'an_val' [2] 'two_val'）
• 用户输入序号后，匹配Correct Answer字段验证正确性
• 功能函数需封装在类中，类的__init__方法暂设为pass

当前问题 #

编写的格式化函数运行后，答案字符串首尾残留引号。相关代码及输出如下：

def return_q(self,one_dict):
    #takes a dictionary and looks for "Question" and "Answers" as keys
    #Answers should be list so index counter puts answers list into a dictionary
    #answers = 1:option 2:option 3:option for the purposes of user input
    q_retrive = one_dict[0]['Question']
    index = 0
    answer_dict = {}
    adict = one_dict[0]['Answers']
    print(adict)
    adict = adict[1:-1].split(',')
    print(adict)
    for answer in adict:
        index +=1
        answer_dict[index] = answer
    return (q_retrive,answer_dict)

第二次print输出：

[''an_val'', 'two_val', ''3rd_val'']

返回结果示例：

('onevalue', {1: ''an_val'', 2: 'two_val', 3: ''3rd_val''})

尝试过的无效方法 #

1. strip判断去除引号：未生效，因未重新赋值strip后的结果（字符串不可变，strip返回新字符串）

adict = adict[1:-1].split(',')
print(adict)
for answer in adict:
    if '"' in answer:
        answer.strip('"')  # 未保存处理后的结果
    elif "'" in adict:
        answer.strip("'")
    else:
        pass
    index +=1
    answer_dict[index] = answer
return (q_retrive,answer_dict)

2. eval函数处理：结果不符合预期，因CSV读取的答案字符串格式导致eval后得到单个元素的列表

adict1 = one_dict[0]['Answers']
print(adict1)                       # 输出: ['1,2,3,4']
adict = eval(adict1)                # 输出: ['1,2,3,4']
print(adict1 == adict)              # 输出: False

解决方案：基础函数实现引号去除 #

利用字符串的strip方法一次性去除单引号、双引号及前后空格，同时修正循环中的赋值问题：

class FlashCard:
    def __init__(self):
        pass
    
    def return_q(self, one_dict):
        q_retrive = one_dict[0]['Question']
        answer_dict = {}
        # 处理从CSV读取的答案字符串（假设为类似"['an_val','two_val','3rd_val']"的格式）
        answer_str = one_dict[0]['Answers']
        # 去掉首尾方括号
        trimmed_str = answer_str[1:-1]
        # 按逗号分割成单个答案字符串
        answer_items = trimmed_str.split(',')
        # 遍历处理每个答案，去除引号和空格
        for idx, item in enumerate(answer_items, start=1):
            # strip同时去除单引号、双引号和前后空格
            cleaned_item = item.strip("'\" ")
            answer_dict[idx] = cleaned_item
        return (q_retrive, answer_dict)

验证效果 #

调用函数后，返回结果示例：

('onevalue', {1: 'an_val', 2: 'two_val', 3: '3rd_val'})

后续验证逻辑可通过序号获取答案，与Correct Answer字段对比：

# 示例验证
card = FlashCard()
question, answers = card.return_q(one_dict)
user_input = 2
selected_answer = answers[user_input]
if selected_answer == one_dict[0]['Correct Answer']:
    print("回答正确！")
else:
    print("回答错误！")

内容的提问来源于stack exchange，提问作者AAAddams