购物车

购物车
# 功能要求：
# 要求用户输入总资产，例如：2000
# 显示商品列表，让用户根据序号选择商品，加入购物车
# 购买，如果商品总额大于总资产，提示账户余额不足，否则，购买成功。
# 附加：可充值、某商品移除购物车

goods=[{"name":"电脑","price":1999},
       {"name":"鼠标","price":10},
       {"name":"游艇","price":20},
       {"name":"美女","price":998},
]
shopping_cart=[]
flag=True
sum=0
while flag:
    money=input("请输入您的账户金额：").strip()
    if money.isdigit():
        money=int(money)
        print("商品列表:")
        while flag:
            for i in range(len(goods)):
                print(i+1,goods[i]["name"],goods[i]["price"])
            choice=input("请选择您需要购买的商品或退出(q)：").strip()
            if choice.isdigit():
                choice=int(choice)
                choice=choice-1
                if choice >=0 and choice <len(goods):
                    if money > goods[choice]['price']:
                        product=goods[choice]
                        if product in shopping_cart:
                            n_cart = [cart for cart in shopping_cart if cart["name"] == product["name"]][0]
                            n_num = n_cart.get("num")
                            n_cart["num"] += 1
                        else:
                            product["num"] = 1
                            shopping_cart.append(product)
                        money = money - goods[choice ]["price"]
                        sum+=goods[choice ]["price"]
                        print("购买成功,您购买了"+goods[choice]['name'],'您还剩'+str(money)+'元钱')
                    elif money<goods[choice]['price']:
                        print("对不起，您的账户余额不足！")
                        flag=False
                else:
                    print('商品不存在')
                    continue
            elif choice.lower()=='q':
                print('---购物清单---')
                print("编号\t商品\t价格\t数量")
                for cart in shopping_cart:
                    print(str(shopping_cart.index(cart)+1) +"\t" +str(cart["name"]) + "\t" + str(cart["price"]) + " " + str(cart.get("num", 0)))
                print('共消费'+str(sum)+'元'+'\n您的余额是'+str(money)+'元'+'\n---结束购物---')
                flag=False
            else:
                print('请输入数字或q')
                continue
    else:
        print('请输入数字')