Python3实验 三级菜单

Python3实验  三级菜单 

一、代码

# 本科计算机科学与技术

# 学号：20170000001 

# 姓名：池鱼奥耶

date = {

    '山东':{

            "济南":{

                "历下区":{"腾讯","华为","小米"},

                "历城区":{"三只松鼠物流","苏宁物流","普洛斯物流"}

            },

            "青岛":{

                "崂山区":{"奔驰","宝马","奥迪","五菱宏光"},

                "黄岛区":{"高铁","地铁","公交"},

                "市北区":{"拼夕夕","阿里麻麻","京东"}

            },

            "日照":{

                "东港区":{"万平口风景区","灯塔风景区","黄海之眼","花仙子风景区"},

                "岚山区":{"多岛海风景区","碧波山庄","茶香小镇巨峰","磴山风景区"},

                "莒县":{"莒国"},

                "五莲县":{"五莲山风景区"}

            }

    },

    '湖北':{

            "武汉":{

                "江岸区":{"武","汉","加","油"},

                "江汉区":{"武","汉","加","油"},

                "青山区":{"武","汉","加","油"},

                "武昌区":{"武","汉","加","油"}

            },

            "黄冈市":{

                "黄州区":{"黄","冈","加","油"},

                "咸宁市":{"黄","冈","加","油"}

            },

            "荆州区":{

                "沙市区":{"荆","州","加","油"},

                "荆州区":{"荆","州","加","油"}

            }

    },

    '江苏':{

            "南京市":{

                "玄武区":{"大学城","双都飞"},

                "白下区":{"工业区","农业区"}

            },

            "无锡市":{

                "崇安区":{"旅游区","度假区","休闲区"},

                "南长区":{"娱乐区","双阳区","不知道"}

            },

            "徐州市":{

                "云龙区":{"山顶","无极"},

                "鼓楼区":{"火车站","汽车站"}

            }

    },

    '广东':{

            "珠海市":{

                "香洲区":{"商业","旅游","工作"},

                "斗门区":{"富家","双极"}

            },

            "广州市":{

                "白云区":{"吃","喝","玩","OPP"}

            },

            "汕头市":{

                "金平区":{"美的","OPPO","VIVO","HUAWEI"},

                "龙湖区":{"格力","长虹","小天使"}

            }

    }

}

exit_flag = False

# while循环 可以多次返回

while True :

    # for循环遍历字典中的数据

    for i in  date :

        print(i)

    # 用户输入选择进入

    choice = input("选择进入>>>>>")

    if choice in date :

        while not exit_flag :

    #输入选择后 用for循环再次遍历字典的下一层 再次让用户选择输入 再进入下一层 一次循环进入下一层

            for second in date[choice] :

                print("\t",second)

            choice2 = input("选择进入2>>>>>")

            if choice2 in date[choice] :

                while not exit_flag :

                    for third in  date[choice][choice2]:

                        print("\t\t",third)

                    # 进入字典的第三层

                    choice3 = input("选择进入3>>>>")

                    if choice3 in date[choice][choice2]:

                            for forth in date[choice][choice2][choice3]:

                                print("\t\t",forth)

                            # 这里是最后一层  让用户选择输入 输入B 就返回上一级

                            choice4 = input("这里是最后一层,输入B/b返回")

                            # 判断用户输入的是什么

                            if choice4 == "B" or choice4 == "b":

                                break

                            # 如果输入Q就退出  下面的内容都是一样的道理

                            elif choice4 == "q" or choice4 == "Q":

                                exit_flag = True

                    if choice3 == "b" or choice3 == "B":

                        break

                    elif choice3 == "q" or choice3 == "Q":

                        exit_flag = True

            if choice2 ==  "b" or choice2 == "B":

                break

            elif choice2 == "q" or choice2 == "Q":

                exit_flag = True

二、运行