python 简单购物车小程序

salary=5000
goods_list=[['iphone6s',5800],['mac book',9000],['coffee',32],['python book',50],['bicycle',1500]]
print("Welcome to our store,the following is our goods _list")
shoping_cart=[]#购物车，进入购物车的商品是已购商品，如果要做未购商品的购物车，只需要加个变量salary_tmp

#打印商品列表
for i,j in enumerate(goods_list,1):
    # print("%d. %-12s %d"%(i,j,k))
    print("%d. %-12s %d"%(i,j[0],j[1]))

while True:
     num=input("Please input the goods number you want to buy:")
     #对输入进行检查，输入是quit退出，是商品号进行处理，是其他的报错
     if num.isdigit():
         num=int(num)-1
     elif num=="quit":
         break
     else:
         print("please input quit or the goods number")
         continue
     #获取商品价格和商品名称
     goods_price=goods_list[num][1]
     goods=goods_list[num][0]
     #如果余额不足则无法购买，余额足够则让余额减少
     if goods_price>salary :
         print("Your money is not enough",salary-goods_price)
     else:
         print("the %s has already put into your shoping cart,your recent money: %d"%(goods,salary-goods_price))
         shoping_cart.append([goods,goods_price])
         salary -= goods_price
#已购商品提示
print("You have already bought %d goods"%(len(shoping_cart)))
for i in range(len(shoping_cart)):
    print("%d. %-12s %d"%(i+1,shoping_cart[i][0],shoping_cart[i][1]))
print("Your recent money：%d\nLooking forward to your next visit"%salary)

Welcome to our store,the following is our goods _list
1. iphone6s     5800
2. mac book     9000
3. coffee       32
4. python book  50
5. bicycle      1500
Please input the goods number you want to buy:1
Your money is not enough -800
Please input the goods number you want to buy:2
Your money is not enough -4000
Please input the goods number you want to buy:3
the coffee has already put into your shoping cart,your recent money: 4968
Please input the goods number you want to buy:4
the python book has already put into your shoping cart,your recent money: 4918
Please input the goods number you want to buy:5
the bicycle has already put into your shoping cart,your recent money: 3418
Please input the goods number you want to buy:quit
You have already bought 3 goods
1. coffee       32
2. python book  50
3. bicycle      1500
Your recent money：3418
Looking forward to your next visit