如何從CSV文件導入的列表/字典中的項目中選擇隨機問題？

Question

我必須將測驗編碼為作業。 最后一步涉及到我隨機選擇問題的順序。

我不確定如何執行此操作，因為即使我現有的代碼也無法100％確認-是從CSV文件本身還是從列表/字典中選擇它（是列表還是字典？） 。

score=0
questionno=0
def parse_csv(file_name: str) -> dict:
    retval = {}
    with open(file_name) as f:
        for line in f:
            data = line.strip().split(',')
            key, *values = (v.strip() for v in data)
            retval[key] = values
    return retval

questions = parse_csv('questions.txt')
for question, answers in questions.items():
    questionno+=1
    correct = answers[-1]
    answers = answers[:-1]
    print(questionno)
    result = input(f"{question}: {','.join(answers)}")
    if result=="A" or result=="B" or result=="C" or result=="D":
        if result == correct:
            print('Correct!')
            score+=1
        else:
            print(f'The correct answer is {correct!r}')
            break
    else:
        print("Invalid Entry")
        break

print(score)

Answer 1

按照設計，Python中的字典沒有任何順序（請參閱OrderedDict ），但是當您對其進行迭代時，該順序也不是真正隨機的！

我建議將問題順序真正隨機化：

from random import shuffle


questions = parse_csv('questions.txt')
shuffledquestions = list(questions.items())
shuffle(shuffledquestions)
for (question, answer) in shuffledquestions:
    questionno+=1
    correct = answers[-1]
    answers = answers[:-1]
    print(questionno)
    result = input(f"{question}: {','.join(answers)}")
    if result=="A" or result=="B" or result=="C" or result=="D":
        if result == correct:
            print('Correct!')
            score+=1
        else:
            print(f'The correct answer is {correct!r}')
            break
    else:
        print("Invalid Entry")
        break

這個想法是列出（問題，答案）元組的列表，使用random.shuffle對其進行混洗，然后對其進行迭代。

編輯：我忘記了shuffle（）到位並且沒有返回列表，現在應該可以了

Answer 2

這是一本字典。 在將字典轉換為元組列表后，可以使用numpy.random.shuffle ，如下所示：

import numpy as np

questions = list(parse_csv('questions.txt').items())
np.random.shuffle(questions)
for question, answers in questions:
    ...

Answer 3

如果用戶輸入的條目無效，您可以再次詢問該問題-也會使訂單混亂。

import random
score=0
questionno=0
def parse_csv(file_name: str) -> dict:
    retval = {}
    with open(file_name) as f:
        for line in f:
            data = line.strip().split(',')
            key, *values = (v.strip() for v in data)
            retval[key] = values
    return retval
questions = parse_csv('questions.txt')
l = list(questions.items())
random.shuffle(l)
questions = dict(l)
for question, answers in questions.items():
    questionno+=1
    correct = answers[-1]
    answers = answers[:-1]
    while True:    
        result = input(f"{question}: {','.join(answers)}")
        if result=="A" or result=="B" or result=="C" or result=="D":
            if result == correct:
                print('Correct!')
                score+=1
                break
            else:
                print(f'The correct answer is {correct!r}')
                break
        else:
            print("Invalid Entry\n Try again...")