购物车，添加商品

#!/usr/bin/evn python
# -*- coding:utf-8 -*-
# Author: Aron

commodity_list = [
    ('衣服',249),
    ('裤子',289),
    ('橘子',249),
    ('罗明',180)
]

Customer_type = input("Please enter the customer type(Customer or business):") #请选择用户类型
if Customer_type == 'Customer':
    Shopping_list = [ ]
    salary = input("Input your salary:")#输入工资
    if salary.isdigit():
        salary = int(salary)
        while True: #进入循环
            for k, v in enumerate(commodity_list):#打印出列表下标和值
                print(k, v)
            user_choice = input("请选择购买商品>>>:") #选择购买的商品
            if user_choice.isdigit(): #判断是否为数字类型
                user_choice = int(user_choice) #转换成整数类型
                if user_choice < len(commodity_list) and user_choice >= 0:#判断输入的商品编号是否存在商品列表
                    p_time = commodity_list[user_choice]#通过下标取出列表的值
                    if p_time[1] <= salary: #判断是否能够购买
                        Shopping_list.append(p_time)#添加商品到购买的商品
                        salary -= p_time[1] #工资总额减去购买的商品
                        print("Added %s into shopping,your current balance is \033[31;1m%s\033[0m" % (p_time, salary)) #打印出剩余工资
                    else:
                        print("\033[41;1m你的余额只剩[%s]啦，还买什么呢?\033[310m")
                else:
                    print("商品[%s]不存在" % user_choice)
            elif user_choice == 'q':
                print("--------shopping list --------------")
                for p in Shopping_list:
                    print(p)
                print("your current balance", salary)
                exit()
            else:
                print("输入错误>>>")
    else:
        print("输入错误>>>")
elif Customer_type == 'business':
    for k,v in enumerate(commodity_list):
        print(k,v)
    user_choice = input("Do you need to add goods?:")
    if user_choice == 'yes':
        while True:
            subscript = input('请输入商品序号:')
            if subscript.isdigit():
                subscript = int(subscript)
                Commodity = input('请输入商品名称:')
                price = input('请输入商品价格')
                commodity_list.insert(subscript,(Commodity,price))
                print('已有的商品为:')
                for k,v in enumerate(commodity_list):
                    print(k,v)
            else:
                print('输入错误。')
                exit()
    else:
        exit()