关于三级菜单

Posted 2021-12-01 rainbowupdate

#数据结构：
menu = {
    ‘北京‘:{
        ‘海淀‘:{
            ‘五道口‘:{
                ‘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‘:{
            ‘火车站‘:{
                ‘携程‘:{}
            }
        },
        ‘浦东‘:{},
    },
    ‘山东‘:{},
}
while True:
    for i in menu:
        print(i)
    choice = input(‘>‘).strip()
    while True:
        if choice in menu:
            print(‘进入第一级‘)
            for i in menu[choice]:
                print(i)
            choice2 = input(‘>>‘).strip()
            if choice2 == ‘return‘:
                print(‘返回上一层‘)
                break
            elif choice2 in menu[choice]:
                pass
            elif choice2 == ‘q‘:
                exit()
            else:
                print(‘输入有误‘)
                continue
            while True:
                if choice2 in menu[choice]:
                    print(‘进入第2级‘)
                for i in menu[choice][choice2]:
                    print(i)
                choice3 = input(‘>>>‘).strip()
                if choice3 == ‘return‘:
                    print(‘返回上一级‘)
                    break
                elif choice3 in menu[choice][choice2]:
                    pass
                elif choice3 == ‘q‘:
                    exit()
                else:
                    print(‘输入有误‘)
                    continue
                while True:
                    if choice3 in menu[choice][choice2]:
                        print(‘进入第三级‘)
                    for i in menu[choice][choice2][choice3]:
                        print(i)
                    choice4 = input(‘如果返回输入return‘).strip()
                    if choice4 == ‘return‘:
                        print(‘返回上一级‘)
                        break
                    elif choice4 == ‘q‘:
                        exit()
                    else:
                        break
        elif choice == ‘q‘:
            exit()
        else:
            choice = input(‘>‘).strip()






#升级版本：
current_layer = menu
count = 0
up_layer = menu
while True:
    for i in current_layer:
        print(i)
    choice = input(‘>‘).strip()
    if not choice:continue
    elif choice == ‘return‘:
        current_layer = up_layer
        continue
    elif choice == ‘q‘:
        exit()
    elif choice in current_layer:
        up_layer = current_layer
        current_layer = current_layer[choice]
    else:
        print(‘重新输入‘)