import random
score = ()
def y():
    a = random.randint(0,10)
    b = random.randint(1,20)
    print(a,"*",b,"= ? ")
    x = int(input(" a * b = "))
    if x == a*b:
        score=+1
        print("Правильно)",score)
    else:
        score=-2
        print("Не верно(",'Правильный ответ = ', a*b, score)
    return y()
y()

 import random
def load_score():
    try:
        with open('score.txt') as f:
            score = int(f.read())
    except Exception:
        score = 0
    return score
def save_score(score):
    with open('score.txt', 'w') as f:
        f.write(str(score))
def question(score):
    a = random.randint(0,10)
    b = random.randint(1,20)
    print(a,"*",b,"= ? ")
    x = int(input(" a * b = "))
    if x == a*b:
        score += 1
        print("Правильно)",score)
    else:
        score -= 2
        print("Не верно(",'Правильный ответ = ', a*b, score)
    return score
def main():
    score = load_score()
    while True:
        score = question(score)
        save_score(score)
main()