Python 简单购物程序

# Author:Eric Zhao# -*- coding:utf-8 -*-‘‘‘需求:启动程序后，让用户输入工资，然后打印商品列表允许用户根据商品编号购买商品用户选择商品后，检测余额是否够，够就直接扣款，不够就提醒 可随时退出，退出时，打印已购买商品和余额‘‘‘

product_list = [    (‘IPhone‘,5000),    (‘Bike‘, 500),    (‘Car‘, 50000),    (‘Hat‘, 50)]shopping_list = []salary = input(‘Please input your salary..‘)if salary.isdigit():    salary = int(salary)    while True: # 死循环        # for item in product_list:            # print(product_list.index(item),item)        for index,item in enumerate(product_list):            print(index,item)

user_choice = input(‘Please type a product number,if type q then exit..‘)        if user_choice.isdigit():            user_choice = int(user_choice)            if user_choice < len(product_list) and user_choice>=0:                choice_list = product_list[user_choice]                if salary >= choice_list[1]: # 买得起                    shopping_list.append(choice_list)                    salary = salary - choice_list[1]                    print(‘Added %s into shopping cart,your balance is\033[31;1m%d\033[0m‘%(choice_list,salary))                else:                    print(‘Your balance is only \033[31;1m%d\033[0m,not enough..‘%salary)            else:                print(‘The product number [\033[31;1m%d\033[0m] doesn\‘t exist..‘%user_choice)        elif user_choice == ‘q‘:            print(‘------------------- shopping list --------------------‘)            for mylist in shopping_list:                print(mylist)            print(‘Your balance is \033[31;1m%d\033[0m‘%salary)            exit()        else:            print(‘Invalid number‘)else:    print(‘Please type a integer..‘)