Python读取文本存入列表时多余空串及答案错存问题排查

问题1：test_questions列表出现大量空字符串的原因 #

你定义的read_quest函数循环逻辑错误：

• 你当前的循环是遍历file_read_q的每一行，也就是读取到多少行就会循环多少次，每次循环都会向test_questions追加一次内容
• 你的测试题库只有2道题，对应两次切片就能取完所有有效内容，后续循环的切片范围已经超出了读取到的行列表范围，file_read_q[start:stop]返回空列表，join之后就得到空字符串，最终就出现大量空值。
  正确做法是按每5行一组的步长循环，不要按行遍历。

问题2：答案被追加到test_questions列表的原因 #

你在read_answers函数里写错了追加的列表名，把本该追加到test_answers的内容错误写到了test_questions里，只需要把test_questions.append(i)改成test_answers.append(i)即可。

test_questions = []
test_answers = []

# 读取问题列表
def read_quest():
    # 用with上下文管理器自动处理文件关闭，无需手动调用close
    with open("test_question_bank.txt", "r", encoding="utf-8") as bank:
        file_read_q = bank.readlines()
        # 按每5行一组遍历，避免无效循环
        for start in range(0, len(file_read_q), 5):
            stop = start + 5
            temp_q = "".join(file_read_q[start:stop]).strip()
            # 过滤空内容
            if temp_q:
                test_questions.append(temp_q)

# 读取答案列表
def read_answers():
    with open("test_correct_ans.txt", "r", encoding="utf-8") as ans:
        file_read_a = ans.readlines()
        for i in file_read_a:
            i = i.strip("\n")
            # 修正追加的目标列表
            if i:
                test_answers.append(i)
 
# 新增题目函数
def add_quest():
    prompt = input("Please write question: ")
    ansa = input("Write answer for choice a): ")
    ansb = input("Write answer for choice b): ")
    ansc = input("Write answer for choice c): ")
    correct_opt = input("Which option is the correct answer? ")
    temp_quest = f"{prompt}\n(a) {ansa}\n(b) {ansb}\n(c) {ansc}\n\n"
    with open("test_question_bank.txt", "a", encoding="utf-8") as bank:
        bank.write(temp_quest)
    with open("test_correct_ans.txt", "a", encoding="utf-8") as correct_ans:
        correct_ans.write(correct_opt + "\n")

read_quest()
read_answers()
print(test_questions)
print(test_answers)
# add_quest()

内容的提问来源于stack exchange，提问作者Japs6901