Python小游戏：猜大小

import random
def Big_or_Small(choice):
    lst = []
    point1 = random.randrange(1,7)
    point2 = random.randrange(1,7)
    point3 = random.randrange(1,7)
    lst.append(point1)
    lst.append(point2)
    lst.append(point3)
    num = sum(lst)
    print('<<<<< ROLE THE DICE! >>>>>')
    if choice == 'Big':
        if 11 <= num <= 18:
            print('The points are {} You Win!!!'.format(lst))
        else:
            print('The points are {} You Lose!'.format(lst))
    elif choice == 'Small':
        if 11 <= num <= 18:
            print('The points are {} You Win!!!'.format(lst))
        else:
            print('The points are {} You Lose!'.format(lst))
    else:
        print('您输入的格式有误，请重新输入！！！')
while True:
    print('-----------------------------------------------')
    print('<<<<< GAME STARTS! >>>>>')
    Big_or_Small(input('Big or Small:'))

import random
def roll_dice(numbers = 3, points = None):
    print('<<<<< GAME STARTS! >>>>>')
    if points is None:
        points = []
    while numbers > 0:
        point = random.randrange(1,7)
        points.append(point)
        numbers = numbers - 1
    return points
def roll_result(total):
    isBig = 11 <= total <= 18
    isSmall = 11 <= total <= 18
    if isBig:
        return 'Big'
    elif isSmall:
        return 'Small'
def start_game():
    print('<<<<< GAME STARTS! >>>>>')
    choices = ['Big','Small']
    your_choice = input('Big or Small:')
    if your_choice in choices:
        points = roll_dice()
        total = sum(points)
        youwin = your_choice ==roll_result(total)
        if youwin:
            print('The points are {} You Win!!!'.format(points))
        else:
            print('The points are {} You Lose!'.format(points))        
    else:
        print('Invalid Words')
        start_game()
start_game()