简单购物车

#_*_ coding:utf-8 _*_
print("这是一个简单的购物程序！")
Salary=input("请输入您的余额:")
Product_list=[[‘1‘,‘Iphone7‘,5288],[‘2‘,‘Thinkpad x240‘,9000],[‘3‘,‘Mac book‘,12000],[‘4‘,‘ Canon camera‘,6888]]
Buy_list=[]
Blance=0
def list_product():
    print("我们的商品如下:")
    i=0
    while i < len(Product_list):
        j=0
        while j < len(Product_list[i]):
            print(Product_list[i][j],end=‘ ‘)
            j=j+1
        print()
        i=i+1

def buy_main():
    Product_num = input("请输入您要购买的商品的编号：")
    global Blance
    if Product_num == ‘q‘ or Product_num == ‘Q‘:
        print("我的购物车：", Buy_list[:])
        print("您的余额为：", Blance)
        exit()
    else:
        i=0
        while i < len(Product_list):
            j=0
            while j < len(Product_list[i]):
                if Product_list[i][j] == Product_num and Product_list[i][2] <= int(Salary):
                    print("您购买的商品为",Product_list[i][1],"价值",Product_list[i][2])
                    print("您的余额为：",int(Salary)-Product_list[i][2])
                    Blance=int(Salary)-Product_list[i][2]
                    Buy_list.append(Product_list[i][1:])
                    print("我的购物车：",Buy_list[:])
                elif Product_list[i][j] == Product_num and Product_list[i][2] > int( Blance):
                    print("对不起，您的余额不足！")
                    exit()
                else:

                    break
                j=j+1
            print()
            i=i+1
i = 0
while i <= 0:
    list_product()
    buy_main()
    i = i-1