购物车脚本

#!/usr/bin/env.python
# -*- coding: utf-8 -*-
"""
-------------------------------------------------
 File Name：  shopping
 Description :
 Author :  lym
 date：   2018/2/24
-------------------------------------------------
 Change Activity:
     2018/2/24:
-------------------------------------------------
"""
__author__ = 'lym'
# 定义一个商品列表，里面写入商品的值和价格
product_list = [
    ('iphone', 5000),
    ('coffee', 31),
    ('bicyle', 888),
    ('iwatch', 2666),
    ('Mac Pro', 12000),
    ('book', 88)
]
shopping_list = []  # 空列表，存放购买的商品

salary = input("请输入你的工资:")
if salary.isdigit():  # isdigit() 方法检测字符串是否只由数字组成,是则返回True,否则返回False
    salary = int(salary)
    while True:
        for index, i in enumerate(product_list):  # index作为下标索引
            print(index, i)
        # enumerate() 函数用于将一个可遍历的数据对象(如列表、元组或字符串)组合为一个索引序列，同时列出数据和数据下标，一般用在 for 循环当中。
        user_choice = input("请输入你要购买的商品:")
        if user_choice.isdigit():
            user_choice = int(user_choice)
            if user_choice < len(product_list) and user_choice >= 0:
                product_choice = product_list[user_choice]
                if product_choice[1] < salary:  # 买得起
                    shopping_list.append(product_choice)  # 买得起，就放入购物车
                    salary -= product_choice[1]
                    print(
                        "Add %s into your shopping_list,your balance is \033[31;1m%s\033[0m" % (product_choice, salary))
                else:
                    print("\033[41;1m你的余额只剩%s啦，还买个叼啊！\033[0m" % salary)
                    print("---------shopping list-----------")
                    for s_index, s in enumerate(shopping_list):
                        print(s_index, s)
                    print("---------shopping list-----------")
                    print("你的余额为：\033[31;1m%s\033[0m" % salary)
            else:
                print("没有这个商品")
        elif user_choice == "q":
            print("---------shopping list-----------")
            for s_index, s in enumerate(shopping_list):
                print(s_index, s)
            print("---------shopping list-----------")
            print("你的余额为：\033[31;1m%s\033[0m" % salary)
            exit()
        else:
            print("输入错误")
else:
    print("输入错误")