2 -14 三级菜单

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

# 1.定义menu
menu = {
    ‘北京‘: {
        ‘海淀‘: {
            ‘五道口‘: {
                ‘soho‘: {‘soho‘},
                ‘网易‘: {},
                ‘google‘: {}
                },
            ‘中关村‘: {
                ‘爱奇艺‘: {},
                ‘汽车之家‘: {},
                ‘youku‘: {},
                },
            ‘上地‘: {
                ‘百度‘: {},
                },
            },
        ‘昌平‘: {
            ‘沙河‘: {
                ‘老男孩‘: {},
                ‘北航‘: {},
                },
            ‘天通苑‘: {},
            ‘回龙观‘: {},
            },
        ‘朝阳‘: {},
        ‘东城‘: {},
    },
    ‘上海‘: {
        ‘闵行‘: {
            "人民广场": {
                ‘炸鸡店‘: {}
            }
        },
        ‘闸北‘: {
            ‘火车战‘: {
                ‘携程‘: {}
            }
        },
        ‘浦东‘: {},
    },
    ‘山东‘: {},
}

while True:
    # 2.打印menu_1
    for item in menu:
        print(item)

    # 3.用户输入choice
    choice_1 = input("请输入你的选择1 q退出 >:").strip()

    # 4.判断输入
    if choice_1 in menu.keys():
        # print(‘ok‘)
        while True:
            for item in menu[choice_1]:
                print(‘\t‘, item)
            choice_2 = input("\t请输入你的选择2 q退出|b返回 >:").strip()
            if choice_2 in menu[choice_1].keys():
                # print(‘ok‘)
                while True:
                    for item in menu[choice_1][choice_2]:
                        print(‘\t‘, item)
                    choice_3 = input("\t\t请输入你的选择3 q退出|b返回 >:").strip()
                    if choice_3 in menu[choice_1][choice_2].keys():
                        while True:
                            for item in menu[choice_1][choice_2][choice_3]:
                                print(‘\t\t\t‘, item)
                            choice_4 = input("\t\t\t请输入你的选择4 q退出|b返回 >:").strip()
                            if choice_4 in menu[choice_1][choice_2][choice_3].keys():
                                while True:
                                    print(‘\t\t\t\t‘, menu[choice_1][choice_2][choice_3].get(choice_4))
                                    choice_5 = input(‘\t\t\t\t你已经到底部了 q退出|b返回: ‘).strip()
                                    if choice_5 == ‘q‘:
                                        print("------bye bye----")
                                        exit()
                                    elif choice_5 == ‘b‘:
                                        break
                                    else:
                                        print("\t\t\t\t输入有误，请重新输入")
                            elif choice_4 == ‘b‘:
                                break
                            else:
                                print("\t\t\t输入有误，请重新输入")

                    elif choice_3 == ‘q‘:
                        print("------bye bye----")
                        exit()
                    elif choice_3 == ‘b‘:
                        break
                    else:
                        print("\t\t输入有误，请重新输入")
            elif choice_2 == ‘q‘:
                print("------bye bye----")
                exit()
            elif choice_2 == ‘b‘:
                break
            else:
                print("\t输入有误，请重新输入")

    elif choice_1 == ‘q‘:
        print("------bye bye----")
        exit()
    else:
        print("输入有误，请重新输入")