python 字典的应用_简单的三级列表

代码：
# -*- coding=utf-8 -*-
# Author:gx

data = {
    "北京":{
        "朝阳":{},
        "海淀":{},
        "昌平":{}
    },
    "山东":{
        "济南":{},
        "青岛":{},
        "蓬莱":{},
        "淄博":{}
    },
    "安徽":{
        "合肥":{
            "肥西":["上派","桃花","花岗"],
            "肥东":["磨店","撮镇","店埠"],
            "长丰":["双墩","岗集","下塘"]
        },
        "安庆":{
            "太湖": [],
            "宿松": [],
            "望江": []
        },
        "六安":{
            "金寨": [],
            "舒城": [],
            "霍邱": []
        }
    },
    "上海":{
        "徐汇": {},
        "普陀": {},
        "长宁": {},
        "静安": {}
    }
}

exit_flag = False

while not exit_flag:
    for i in data:
         print(i)
    choice = input("选择进入>>:")
    if choice in data:
        while not exit_flag:
            for i2 in data[choice]:
                print("	",i2)
            choice2 = input("选择进入>>:")
            if choice2 in data[choice]:
                while not exit_flag:
                    for i3 in data[choice][choice2]:
                        print("		", i3)
                    choice3 = input("选择进入>>:")
                    if choice3 in data[choice][choice2]:
                        for i4 in data[choice][choice2][choice3]:
                            print("			", i4)
                        choice4 = input("最后一层，按b返回")
                        if choice4 == "b":
                            pass
                        elif choice4 == "q":
                            exit_flag = True
                        else:
                            print("输入的地区不在选择范围内,请重新选择")
                    if choice3 == "b":
                        break
                    elif choice3 == "q":
                        exit_flag = True
                    else:
                        print("输入的地区不在选择范围内,请重新选择")
            if choice2 == "b":
                break
            elif choice2 == "q":
                exit_flag = True
            else:
                print("输入的地区不在选择范围内,请重新选择")
    elif choice == "q":
        exit_flag = True
    else:
        print("输入的地区不在选择范围内,请重新选择")

常规的用法需要多应用，多写多练，练习多了自然就会写了，boy~~~加油！