day2-三级菜单

#!/usr/bin/env python

data = {
    ‘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