第2章 Python基础-字符编码&数据类型 购物车&多级菜单 作业

#!/usr/bin/env python
# -*- coding:utf-8 -*-

# products = {"iPhone X":8999,"小米笔记本":5599,"小米智能家庭套装":299,"阿迪达斯运动鞋":566}  # 用字典做最外层不行，字典是无序的
# products = [{"iPhone X":8999},{"小米笔记本":5599},{"小米智能家庭套装":299},{"阿迪达斯运动鞋":566}] # 用字典做最内层也不行，循环时不容易获取键和值
products = [["iPhone X",8999],["小米笔记本",5599],["小米智能家庭套装",299],["阿迪达斯运动鞋",566]] # 内外都用列表，用索引方便取值
shopping_carts = [] #初始购物车为空
money = 0 # 初始工资为空
money += int(input("请输入您的工资："))
exit_flag = False

while not exit_flag:
    print("\n------------商品列表-----------\n")  # 商品列表
    for index, product in enumerate(products):
        print("%s.%s %d" % (index, product[0], product[1]))
    print("\n-------------------------------\n")
    product_id = input("请输入您要购买的商品编号(输入q可退出)：")
    if product_id.isdigit():
        product_id = int(product_id)
        if product_id >= 0 and product_id < len(products):
            if money >= products[product_id][1]:
                money -= products[product_id][1]
                shopping_carts.append(products[product_id][0])
            else:
                print("\n您的工资余额为%s元,而该商品价值%s元,不能购买！\n" % (money,products[product_id][1]))
                # exit_flag =True
        else:
            print("商品标号有误,请重新输入")
    elif product_id == "q":
        if len(shopping_carts) > 0:
            print("\n您添加到购物车的商品如下：\n")
            for index, product_carts in enumerate(shopping_carts):
                print("%s. %s" % (index, product_carts))
        else:
            print("\n您的购物车为空！")
        print("\n您的工资余额为%s元！\n" % (money))
        exit_flag = True

#!/usr/bin/env python
# -*- coding:utf-8 -*-

China = {
    ‘河南省‘: {
        ‘焦作市‘: [‘武陟‘, ‘温县‘, ‘博爱‘],
        ‘郑州市‘: [‘新郑‘, ‘荥阳‘, ‘中牟‘],
        ‘开封市‘: [‘兰考‘, ‘尉氏‘, ‘杞县‘],
    },
    ‘广东省‘: {
        ‘广州市‘: [‘越秀‘, ‘荔湾‘, ‘番禺‘],
        ‘深圳市‘: [‘福田‘, ‘罗湖‘, ‘龙岗‘],
        ‘东莞市‘: [‘莞城‘, ‘南城‘, ‘东城‘],
    },
}

exit_flag = False
while not exit_flag:  # 第1层循环
    print("---------------------------------")
    print("         欢迎您来到中国      ")
    print("---------------------------------")
    for Province in China:
        print(Province)
    print()
    choice_province = input("1.请输入您要前往的 省份 (输入q退出,输入b返回上级):")
    print()
    if choice_province == "q":
        exit_flag = True
    elif choice_province == "b":
        continue  # 跳出第1层循环的剩下语句，继续进行下一次循环（选择省份）
    elif choice_province in China:
        while not exit_flag:  # 第2层循环
            for City in China[choice_province]:
                print(City)
            print()
            choice_city = input("2.请输入您要前往的 市区 (输入q退出,输入b返回上级):")
            print()
            if choice_city == "q":
                exit_flag = True
            elif choice_city == "b":
                break  # 跳出整个第2层循环，重新进行第1层循环（选择省份）
            elif choice_city in China[choice_province]:
                while not exit_flag:  # 第3层循环
                    for County in China[choice_province][choice_city]:
                        print(County)
                    print()
                    choice_county = input("3.请输入您要前往的 县 (输入q退出,输入b返回上级):")
                    print()
                    if choice_county == "q":
                        exit_flag = True
                    elif choice_county == "b":
                        break  # 跳出整个第3层循环，重新进行第2层循环（选择市区）
                    elif choice_county in China[choice_province][choice_city]:
                        print("---------------------------------")
                        print("您现在的位置是：", choice_province, choice_city, choice_county)
                        print("---------------------------------")
                        exit_flag = True
                    else:
                        print("您输入的县不存在")
                        print()
                        continue
            else:
                print("您输入的市区不存在")
                print()
                continue
    else:
        print("您输入的省份不存在")
        print()
        continue