python小游戏----猜大小

#!/user/bin/env python
# -*- coding:utf-8 -*-
import random

def roll_dice(numbers=3, points=None):
print('----- 摇骰子 -----')
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 = 3 <= total <= 10
if isBig:
return '大'
elif isSmall:
return '小'

def start_game():
your_money = 1000
while your_money > 0:
print('----- 游戏开始 -----')
choices = ['大', '小']
your_choice = raw_input('请下注，大 or 小：')   #这个位置如果用input函数时输入的字符串要带引号
your_bet = input('下注金额：')
if your_choice in choices:
points = roll_dice()
total = sum(points)
youWin = your_choice == roll_result(total)
if youWin:
print('骰子点数：', points)
print('恭喜，你赢了 {} 元，你现在有 {} 元本金'.format(your_bet, your_money + int(your_bet)))
your_money = your_money + int(your_bet)
else:
print('骰子点数：', points)
print('很遗憾，你输了 {} 元，你现在有 {} 元本金'.format(your_bet, your_money - int(your_bet)))
your_money = your_money - int(your_bet)
else:
print('格式有误，请重新输入')
else:
print('游戏结束')

start_game()