Lesson Complete!

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

def ask_question(text, o1, o2, o3, o4, correct):
    print(text)
    print()
    print(f"  1) {o1}")
    print(f"  2) {o2}")
    print(f"  3) {o3}")
    print(f"  4) {o4}")
    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 == correct
    print()
    print(f"You answered: {answer}")
    if is_correct:
        print("Correct!")
    else:
        print(f"Wrong! The correct answer was option {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 text, o1, o2, o3, o4, correct in questions_for_round:
        result = ask_question(text, o1, o2, o3, o4, correct)
        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)

while True:
    try:
        num_input = input(f"How many questions? (1-{len(QUESTIONS)}, enter for all): ").strip()
        if num_input:
            num = int(num_input)
        else:
            num = len(QUESTIONS)
    except ValueError:
        num = len(QUESTIONS)
    print()
    run_quiz(num=num)
    print()
    again = input("Play again? (y/n): ")
    if again != "y":
        break

print("Thanks for playing!")