功能要求：
要求用戶輸入自己擁有總資產，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，如果商品總額大於總資產，提示賬戶余額不足，否則，購買成功。
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},
]
while True:
    name =input("輸入用戶名:")
    mima =input("請輸入用戶密碼:")
    if name =="qi"and mima =="123":
        print("登陸成功")
        break
    else:
        print("用戶名或密碼錯誤")
money = int(input("總資產"))
lst=[]
while 1:
    print(‘----------商品列表------------
 
‘)
    for i,m in enumerate (goods):
        print(i,m)
    select =input("請選擇您要購買的商品:")
    if select.isdigit():
        if 0<=int(select)<len(goods):
           s=goods[int(select)]
           a =s.get("price")
           print(a)
           if a >=money:
               print("賬戶余額不足")
           
 
else:
               w = s.get("price")
               moneys =money-w
               print("余額還剩",moneys)
               lst.append(s)
               print(lst )
               print("購買成功")

        else:
            print(‘選擇有誤,請重新選擇‘)

    elif  select == ‘q‘:
        print(‘--------------選中商品列表-------------‘)
        for i,v in enumerate(lst):
            print(i,v)
        break

python 實現購物車的優化