Day2：购物车小程序

一、购物车小程序第一版

#!/usr/bin/env python

# -*- coding:utf-8 -*-

# Author:Hiuhung Wan

product_list = [

    ("iphone 8", 5888),

    ("Mi Note3", 2499),

    ("Bike", 788),

    ("Phthon 3.5", 59),

    ("Mac pro", 9888),

    ("Honor 6", 599)

]

notfalse = not False

shopping_cart = []

while notfalse:

    salary = input("Input your salary:")

    if salary.isdigit():

        salary = int(salary)

        while True:

            # for i in product_list:

            #     print(product_list.index(i),i)

            for index, i in enumerate(product_list):

                print(index, i)  # 打印商品列表

            user_choice = input("Please choose what you need to buy:")

            if user_choice.isdigit():

                user_choice = int(user_choice)

                if user_choice < len(product_list) and user_choice >= 0:  # 用户选择了对应的商品

                    if product_list[user_choice][1] <= salary:  # 买得起

                        salary = salary - product_list[user_choice][1]  # 扣钱

                        shopping_cart.append(product_list[user_choice])

                        print("You have purchased %s, and your current balance is %s." % (

                        product_list[user_choice], salary))

                    elif user_choice == "":  # 直接按的回车，没有输入

                        print("Please enter the corresponding number of the goods！")

                    else:  # 钱不够，买不起！

                        print("Your balance is not enough!")

                else:  # 用户输入的数字超出商品总数

                    print("Please check the commodity number!")

            elif user_choice == "q" or user_choice == "Q":  # 要退出

                print("------------shopping list-------------")

                for index, i in enumerate(shopping_cart):

                    print(index, i)

                print("Your current balance is %s." % salary)

                exit()

            else:  # 用户输入的不是数字

                print("Please enter the corresponding number of the goods！")

    elif salary == "q" or salary == "Q":  # 用户想退出

        notfalse = False

    else:  # 用户输入了其他字符

        print("Please input your salary by number!")