python 学习笔记 list用法练习

Posted 2020-09-20

# -*- coding: utf-8 -*-
# author:Sonnar
balance = int(input("Please enter you salary"))
List_of_goods =[[‘NIOXIN‘,188],[‘MAYOOU‘,98],[‘Liese‘,71],[‘Aerogard‘,69],
                [‘AMOS‘,139],[‘Tide‘,29],[‘Crest3D‘,219],[‘AEON‘,60],
                [‘Morocanoil‘,298],[‘EMART‘,128],[‘NIOXIN‘,210],[‘Fino‘,118]]
print("Welcome to the shopping system ...")
print("---------List of goods------------")
for index,item in enumerate(List_of_goods):
    print(index,"\t",item)
print("---------END of Goodslist------------")
print("\033[1;32;0mPlease enter the number or the goods you want to buy...\033[0m")
print("\033[1;31;0mIf you don‘t want to buy it,you can enter‘Q’leave...\033[0m")

shopping=True
Shopping_List=[]
while shopping:
    User_Choice=input("Enter you choice \n")
    if User_Choice.isdigit():
        User_Choice=int(User_Choice)
        if User_Choice<len(List_of_goods) and User_Choice>=0: #防止数据超出列表
            Shopping_List.append(List_of_goods[User_Choice])
            temp=balance
            balance=temp-List_of_goods[User_Choice][1]
            if balance<0:#当余额不足
                Shopping_List.pop()
                balance=temp #将上一次的余额保存
                print("Your balance is not enough...")
                shopping=False
            else:
                print("Your have bought ",List_of_goods[User_Choice][1])#打印购买的商品
    elif  User_Choice=="Q":
        shopping=False
else:
    print("---------List of ShoppingCart------------")
    for index,item in enumerate(Shopping_List):
        print(index,item)
    print("---------END of ShoppingCart------------")

    print("Your balance is [%s]"%(balance))

用 python 3X运行，实现在商品列表上，输入编号来实现购物的小示例。通过while 循环的条件为False，退出，也能在balance不足的情况下 退出循环。退出循环后，打印选购商品的列表。