#!/usr/bin/env pythondata = {    '北京':{        "昌平":{            "望京1": {
   "奔驰", "默默"},            "国贸2": ("cicc", "HP"),        },        "朝阳":{            "望京1":{
   "奔驰","默默"},            "国贸1":("cicc","HP"),        },    },    '山东':{        "昌平": {            "望京1": {
   "奔驰", "默默"},            "国贸2": ("cicc", "HP"),        },        "朝阳": {            "望京2": {
   "奔驰", "默默"},            "国贸2": ("cicc", "HP"),        },    },    '广东':{        "昌平": {            "望京1": {
   "奔驰", "默默"},            "国贸2": ("cicc", "HP"),        },        "朝阳": {            "望京3": {
   "奔驰", "默默"},            "国贸4": ("cicc", "HP"),        },    },}quit_q=""while quit_q!='q':    for i1 in data:        print(i1)    choice1=input("选择进入,按b返回,按q退出>>:")    quit_q=choice1    if choice1== 'b':        break    if choice1 in data:        while quit_q!='q':            for i2 in data[choice1]:                print("\t",i2)            choice2 = input("选择进入,按b返回,按q退出>>:")            quit_q = choice2            if choice2 == 'b':                break            if choice2 in data[choice1]:                while quit_q!='q':                    for i3 in data[choice1][choice2]:                        print("\t\t", i3)                    choice3 = input("选择进入，按b返回,按q退出>>:")                    quit_q = choice3                    if choice3 == 'b':                        break                    if choice3 in data[choice1][choice2]:                        while quit_q != 'q':                            for i4 in data[choice1][choice2][choice3]:                                print("\t\t\t", i4)                            choice4 = input("最后一层，按b返回,按q退出>>:")                            quit_q = choice4                            if choice4 == 'b':                                break