購物車

需求
    要求用戶輸入總資產，例如：2000
    顯示商品列表，讓用戶根據序號選擇商品，加入購物車
    購買，若是商品總額大於總資產，提示帳戶餘額不足，不然，購買成功。
    附加：可充值、某商品移除購物車

測試信息
goods = [
    {"name": "電腦", "price": 1999},
    {"name": "鼠標", "price": 10},
    {"name": "遊艇", "price": 20},
    {"name": "美女", "price": 998},
]

goods = [
    {"name": "電腦", "price": 1999},
    {"name": "鼠標", "price": 10},
    {"name": "遊艇", "price": 20},
    {"name": "美女", "price": 998},
]
# 定義函數，格式化菜單輸出
def menu():
    count=0
    for i in goods:
        print('【{0}】    {1}     {2}'.format(count,i['name'],i['price']))
        count+=1
# 定義購物車空列表
goods_list=[]
tag=True
while tag:
    money=input('How much are you ?').strip()
    # 判斷輸入的數據類型
    if money.isdigit() and len(money) != 0 :
        money = int(money)
        while tag:
            menu()
            choice=input('請輸入你要購買的商品序號：').strip()
            if choice.isdigit() and len(choice) != 0 :
                choice=int(choice)
            if choice >= 0 and choice <= 3:
                # 取出所買商品的信息
                g_l=[]
                for i in goods:
                    g_l.append({i['name']: i['price']})
                info=g_l[choice]
                price_list=list(info.values())
                price=int(price_list[0])
                name_list=list(info.keys())
                # 使用a的值來控制下面兩層while循環
                a=1
                while a == 1:
                    if money >= price:
                        money=money - price
                        print('商品已加入購物車，當前餘額爲{}'.format(money))
                        goods_list.append(name_list[0])
                        while a == 1:
                            print('當前購物車裏商品：',goods_list)
                            choices=input('''
【E】     結帳
【D】     刪除商品
【S】     繼續購買
 請選擇：''').strip().lower()
                            if choices != 'e' and choices != 'd' and choices != 's':
                                print('選擇錯誤，請從新輸入：')
                                continue
                            if choices == 's':
                                a=0
                                break
                            if choices == 'e':
                                print('已結帳，當前餘額爲{}'.format(money))
                                a=0
                                tag=False
                            if choices == 'd':
                                print(goods_list)
                                delet=input('請輸入你想刪除的商品：').strip()
                                if delet in goods_list:
                                    goods_list.remove(delet)
                                    print('%s 刪除成功！' %delet)
                                    continue
                                else:
                                    print('此商品不在購物車')
                                continue

                    else:
                        print('你買不起這個,請選擇：')
                        choicess=input('''
【A】     從新選擇商品
【B】     充值
【C】     退出
請選擇：''').strip().lower()
                        if choicess == 'a':
                            a=0
                        if choicess == 'c':
                            exit()
                        while a == 1:
                            if choicess == 'b':
                                recharge=input('請輸入充值金額：').strip()
                                if recharge.isdigit() and len(recharge) != 0:
                                    recharge = int(recharge)
                                    money = money + recharge
                                    print('充值成功，當前金額爲：',money)
                                    break
                                else:
                                    print('充值金額有誤')
                                    continue
            else:
                print('沒有此商品，請從新選擇')
                continue
    else:
        print('你的輸入有誤,請輸入數字：')
        continue