TypeError: string indices must be integers

[JonWayn]

Dictionaries are not a good choice for your quiz. I can accept this as a dictionary:

{
        "question": "What is the capital of France?",
        "answer": "Paris"
    }

But this should be a list.

quiz = {
    "question1": {},
    "question2": {},
    ...
}

Using "questionN" keys just makes it more difficult to access the questions, and forced you to use items().

I would not use dictionaries for either the questions or the quiz. Since neither the question or quiz change I used tuples.

quiz = (
    ("What is the capital of France?", "PARIS")
    ("What is the capital of Germany?", "BERLIN")
)
 
score = 0
for index, question in (quiz):
    q, a = question
    print(f"Question {index+1} : {q}")
    if input("Answer? ").upper() == a:
        score += 1
        print('Correct!')
    else:
        print(f"Incorrect :(\nThe correct answer is: {a}")
 
print(f"Your score is {score}")

Thank you. I like the brevity of code that you implement but I will have to wrap my mind around the logic of its elegance and simplicity