购物车

自己写的
import sys
goods=[[1,"milk",5],[2,"bike",800],[3,"iphone",5800]]
bought=[]
salary=int(input("input your salary:"))
for i in goods:
    print(i)

while 1:
    id=input("input the id of goods which you want to bug:")
    if id=="q":
        print("购买结束了")
        print("剩余金额：%s"%salary)
        for i in bought:
            print (i)
        sys.exit()
        
    id=int(id)
    if (salary-goods[id-1][2])>0:
        salary=salary-goods[id-1][2]
        bought.append(goods[id-1])
        print(bought)
        print ("该商品购买成功")
        
    else:
        print("your balance is not enough:")


      

标准的：
product_list=[
    ('iphone',5800),
    ('mac pro',9800),
    ('bike',800),
    ('watch',10600),
    ('coffee',31)
]
shopping_list=[]
salary=input("inpur your salary:")
if salary.isdigit():
    salary=int(salary)
    while 1:
        for index,item in enumerate(product_list):
            print(index,item)
        user_choice=input("选择要买啥？：")
        if user_choice.isdigit():
            user_choice=int(user_choice)
            if user_choice<len(product_list) and user_choice>=0:
                p_item=product_list[user_choice]
                if p_item[1]<=salary:
                    shopping_list.append(p_item)
                    salary-=p_item[1]
                    print("Added %s into shopping cart,your current salary is %s"%(p_item[0],salary))
                else:
                    print("你的余额不够了")
            else:
                print("product code %s is not exist！"%user_choice)
        elif user_choice=="q":
            print ("----shopping_list------")
            for p in shopping_list :
                print(p)
            print ("your current balance:",salary)
            exit()
        else:
            print ("invalid option")