How to add next and previous in a quiz [python]

Question

I’ve got the following code that converts a list into a multiple choice quiz:

def practise_test(test):
    score = 0
    for question in test:
        while True:
            print(question[question])
            reaction = input (question[options] + 'n')
            if reaction == question[answer]:
                print ('nright answered!')
                print('The answer is indeed {}. {}n'.format(question[answer], question[explanation]))
                score += 1
                break      
            else:
                print ('nIncorrect answer.')
                print ('The correct answer is {}. {}n'.format(question[answer], question[explanation]))
                break
    print (score)

But now I have to add some code to the practise_test function so that when you type: ‘previous’ you go to the previous question. Anyone have an idea to fix this?

Asked By: Dirk Koomen

||

Source

Answer 1

You can exchange the for loop with a while loop and change the index i in case the user writes “previous”. Btw. the double loop you are using seems unnecessary to me.

example_test = [
        {"question": "1 + 1", "answer": "2", "explanation": "math", "options": "2, 4, 6, 8"},
        {"question": "2 + 2", "answer": "4", "explanation": "math", "options": "2, 4, 6, 8"},
        {"question": "3 + 3", "answer": "6", "explanation": "math", "options": "2, 4, 6, 8"},
        {"question": "4 + 4", "answer": "8", "explanation": "math", "options": "2, 4, 6, 8"},
        ]

def practise_test(test):
    score = 0
    i = 0
    while i < len(test):
        question = test[i]

        print(question["question"])
        reaction = input(question["options"] + 'n')
        if reaction == question["answer"]:
            print ('nright answered!')
            print('The answer is indeed {}. {}n'.format(question["answer"], question["explanation"]))
            score += 1
        elif reaction.startswith("previous"):
            i -= 2
            i = max(i, -1)
        else:
            print ('nIncorrect answer.')
            print ('The correct answer is {}. {}n'.format(question["answer"], question["explanation"]))
        i += 1
    print (score)

practise_test(example_test)

What also seems to be missing is using the dictionary keys as string, but that is just as guess as I do not know the remaining implementation.

Answered By: phngs

How to add next and previous in a quiz [python]

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