Update Stats After Each Round

Unpack run_quiz's return value and update the STATS dictionary

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run_quiz now returns score and total, but the while loop ignores them — it still calls run_quiz(pool, num) without capturing the result.

Unpacking the return value gives the while loop access to both numbers:

score, total = run_quiz(pool, num)

With score and total in hand, updating STATS is straightforward:

STATS["games"] = STATS["games"] + 1
STATS["total_correct"] = STATS["total_correct"] + score

The personal best check needs an if — only update when the current score exceeds the stored one:

if score > STATS["best_score"]:
    STATS["best_score"] = score
    STATS["best_total"] = total

Instructions

Unpack run_quiz's return value and update STATS after each round.

Change run_quiz(pool, num) to score, total = run_quiz(pool, num) — this captures both return values so you can use them to update the stats.
Add STATS["games"] = STATS["games"] + 1 — every completed round increments the game count.
Add STATS["total_correct"] = STATS["total_correct"] + score — accumulates correct answers across rounds.
Add STATS["total_questions"] = STATS["total_questions"] + total — accumulates total questions answered.
Add an if score > STATS["best_score"]: block that sets STATS["best_score"] = score and STATS["best_total"] = total — updates the personal best only when the current round beats it.

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QUESTIONS = [
    {"text": "What is the type of the value 3.14?", "options": ["int", "str", "float", "bool"], "correct": 3, "category": "types"},
    {"text": "What keyword defines a function in Python?", "options": ["for", "def", "if", "class"], "correct": 2, "category": "functions"},
    {"text": "What does print() do?", "options": ["Stores a value", "Returns a number", "Displays output", "Reads input"], "correct": 3, "category": "output"},
    {"text": "What type does input() always return?", "options": ["int", "float", "str", "bool"], "correct": 3, "category": "output"},
    {"text": "Which keyword starts a for loop?", "options": ["loop", "repeat", "for", "each"], "correct": 3, "category": "loops"},
    {"text": "What does len() return?", "options": ["The first item", "The last item", "The number of items", "The sum"], "correct": 3, "category": "basics"},
    {"text": "What is the result of 10 // 3?", "options": ["3.33", "3", "1", "0"], "correct": 2, "category": "basics"},
    {"text": "Which keyword exits a loop early?", "options": ["exit", "return", "stop", "break"], "correct": 4, "category": "loops"},
    {"text": "What does elif stand for?", "options": ["else if", "elif loop", "end loop if", "extra loop"], "correct": 1, "category": "conditionals"},
    {"text": "What does a function return with no return statement?", "options": ["0", "False", "None", "Error"], "correct": 3, "category": "functions"},
]

STATS = {
    "games": 0,
    "best_score": 0,
    "best_total": 0,
    "total_correct": 0,
    "total_questions": 0,
}

def ask_question(q):
    print(q["text"])
    print()
    print(f"  1) {q['options'][0]}")
    print(f"  2) {q['options'][1]}")
    print(f"  3) {q['options'][2]}")
    print(f"  4) {q['options'][3]}")
    print()
    while True:
        answer_text = input("Your answer (1-4): ")
        try:
            answer = int(answer_text)
        except ValueError:
            print("Please enter 1, 2, 3, or 4.")
            continue
        if answer < 1 or answer > 4:
            print("Please enter 1, 2, 3, or 4.")
            continue
        break
    is_correct = answer == q["correct"]
    print()
    print(f"You answered: {answer}")
    if is_correct:
        print("Correct!")
    else:
        print(f"Wrong! The correct answer was option {q['correct']}.")
    return is_correct

def show_results(score, total):
    print(f"Score: {score}/{total}")
    if score == total:
        print("Perfect score!")
    elif score >= 2:
        print("Great job!")
    elif score >= 1:
        print("Not bad!")
    else:
        print("Keep practicing!")

def run_quiz(questions=QUESTIONS, num=None):
    if num is None:
        num = len(questions)
    score = 0
    streak = 0
    questions_for_round = questions[:num]
    total = len(questions_for_round)
    print(f"=== Python Quiz ({total} questions) ===")
    print()
    for q in questions_for_round:
        result = ask_question(q)
        if result:
            score = score + 1
            streak = streak + 1
            if streak >= 3:
                print(f"  Hot streak! ({streak} in a row)")
        else:
            streak = 0
    show_results(score, total)
    return score, total

while True:
    categories = sorted(set(q["category"] for q in QUESTIONS))
  print("Categories: " + ", ".join(categories))
    category = input("Category (enter for all): ").strip()
    if category:
        pool = [q for q in QUESTIONS if q["category"] == category]
        if not pool:
            print("Category not found. Playing all.")
            pool = QUESTIONS
    else:
        pool = QUESTIONS
    try:
        num_input = input(f"How many questions? (1-{len(pool)}, enter for all): ").strip()
        if num_input:
            num = int(num_input)
        else:
            num = len(pool)
    except ValueError:
        num = len(pool)
    print()
    # Step 1: score, total = run_quiz(pool, num)
    run_quiz(pool, num)
    # Step 2: STATS["games"] + 1
    # Step 3: STATS["total_correct"] + score
    # Step 4: STATS["total_questions"] + total
    # Step 5: update best_score / best_total if score > best
    print()
    again = input("Play again? (y/n): ")
    if again != "y":
        break

print("Thanks for playing!")

Update Stats After Each Round

Instructions

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