小练习：python的简易购物车

骑猪看日落 2021-11-22 22:31 308阅读 0赞

### 进击のpython ###

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1,用户先给自己的账户充钱：比如先充3000元。  
2,有如下的一个格式:

goods = [{"name": "电脑", "price": 1999},
    {"name": "鼠标", "price": 10},
    {"name": "游艇", "price": 20},
    {"name": "美女", "price": 998},]

3,页面显示 序号 + 商品名称 + 商品价格，如：  
1 电脑 1999  
2 鼠标 10  
…

4,用户输入选择的商品序号，然后打印商品名称及商品价格,并将此商品，添加到购物车(自己定义购物车)，用户还可继续添加商品。

5,如果用户输入的商品序号有误，则提示输入有误，并重新输入。

6,用户输入N为购物车结算，依次显示用户购物车里面的商品，数量及单价，若充值的钱数不足，则让用户删除某商品，直至可以购买，若充值的钱数充足，则可以直接购买。

7,用户输入Q或者q退出程序。

8,退出程序之后，依次显示用户购买的商品，数量，单价，以及此次共消费多少钱，账户余额多少，并将购买信息显示。

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麻烦算法：

goods = [{"name": "电脑", "price": 1999}, {"name": "鼠标", "price": 10}, {"name": "游艇", "price": 20}, {"name": "美女", "price": 998}, ] shop_car = {} while 1: try: m = int(input("请输入充钱金额>>>")) count = 0 for i in goods: count += 1 print(count, i["name"], i["price"]) while 1: cho_goods = input("买点东西啊小老弟>>>") try: cho_goods = int(cho_goods) a = (goods[cho_goods - 1]["name"], goods[cho_goods - 1]["price"]) if a in shop_car: shop_car[a] += 1 else: shop_car[a] = 1 except ValueError: if cho_goods.upper() == "N": while 1: pay_money = 0 for i in range(len(shop_car)): name = list(shop_car.keys())[i][0] price = list(shop_car.keys())[i][1] twice = list(shop_car.values())[i] pay_money += price * twice print(f'商品名称：{name} 商品单价:{price} 购买数量:{twice}') if pay_money > m: msg = input("超额了熬！！删点什么吧") shop_car1 = shop_car.copy() for k in shop_car1: if msg == k[0]: shop_car[k] -= 1 if shop_car[k] == 0: del shop_car[k] else: pay_money = 0 print("—————————购买成功—————————") for i in range(len(shop_car)): name = list(shop_car.keys())[i][0] price = list(shop_car.keys())[i][1] twice = list(shop_car.values())[i] pay_money += price * twice print(f'商品名称：{name} 商品单价:{price} 购买数量:{twice}') print(f"总共花费：{pay_money}") print(f"钱包余额：{m-pay_money}") print("————————欢迎下次光临————————") exit() elif cho_goods.upper() == "Q": print("欢迎下次光临！") exit() else: print("请重新输入！") except IndexError: print("请重新输入") except ValueError: print("你这钱也不是个正经钱啊！")

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简单算法：

goods = [{"name": "电脑", "price": 1999},
             {"name": "鼠标", "price": 10},
             {"name": "游艇", "price": 20},
             {"name": "美女", "price": 998}, ]
    while 1:
        money = input("充点钱啊！老铁！（按Q退出）")
        try:
            money = int(money)
            name, price, twice = [], [], []
            for i in range(len(goods)):
                print(i + 1, goods[i]["name"], goods[i]["price"])
                name.append(goods[i]["name"])
                price.append(goods[i]["price"])
                twice.append(0)
            while 1:
                num = input("请输入你要购买的东西：")
                try:
                    num = int(num)
                    twice[num - 1] += 1
                    print("以将{}加入购物车，单价为：{}".format(name[num - 1], price[num - 1]))
                except ValueError:
                    if num.upper() == "N":
                        while 1:
                            pay = 0
                            for i in range(len(goods)):
                                if twice[i] <= 0:
                                    pass
                                else:
                                    print(name[i], price[i], twice[i])
                                    pay += price[i] * twice[i]
                            if pay > money:
                                msg = input("超额了熬！！删点什么吧")
                                if msg.upper() == "Q":
                                    print("欢迎下次光临！")
                                    exit()
                                if msg in name:
                                    twice[name.index(msg)] -= 1
                            else:
                                print("—————————购买成功—————————")
                                for i in range(len(goods)):
                                    if twice[i] == 0:
                                        pass
                                    else:
                                        print(f'商品名称：{name[i]}  商品单价:{price[i]}  购买数量:{twice[i]}')
                                print(f"总共花费：{pay}")
                                print(f"钱包余额：{money-pay}")
                                print("————————欢迎下次光临————————")
                                exit()
                    elif num.upper() == "Q":
                        print("欢迎下次光临！")
                        exit()
                    else:
                        print("请重新输入！")
                except IndexError:
                    print("请重新输入")
        except ValueError:
            if money.upper() == "Q":
                print("欢迎下次光临！")
                exit()
            else:
                print("你这钱也不是个正经钱啊！")

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\*学会了吗\* \*凑弟弟\*

转载于:https://www.cnblogs.com/jevious/p/11190299.html