Python——字典应用实例

data={
    ‘北京‘:{
        ‘昌平‘:{
            ‘沙河‘:[‘oldboy‘,‘test‘],
            ‘天通苑‘:[‘链家地产‘,‘我爱我家‘],
        },
        ‘朝阳‘:{
            ‘望京‘:[‘奔驰‘,‘陌陌‘],
            ‘国贸‘: [‘CICC‘, ‘HP‘],
            ‘东直门‘: [‘Advent‘, ‘飞信‘],
        },
        ‘海淀‘:{
        },

    },
    ‘山东‘:{
        "德州": {},
        "青岛": {},
        "济南": {},
    },
    ‘广东‘:{
        "东莞": {},
        "常熟": {},
        "佛山": {},
    },
}
exit_flag=False
while not exit_flag:
    #打印第一层
    for i in data:
        print(i)
    choice=input("选择进入1>>:")
    if choice in data:
        while not exit_flag:
            #打印第二层
            for i2 in data[choice]:
                print("\t",i2)
            choice2=input("选择进入2>>:")
            if choice2 in data[choice]:
                while not exit_flag:
                    #打印第三层
                    for i3 in data[choice][choice2]:
                        print(‘\t\t‘,i3)
                    choice3=input("选择进入3>>:")
                    if choice3 in data[choice][choice2]:
                        #打印第四层
                        for i4 in data[choice][choice2][choice3]:
                            print(‘\t\t\t‘,i4)
                        choice4=input(‘最后一层，按b返回>>:‘)
                        if choice4==‘b‘:
                            pass
                        elif choice4==‘q‘:
                            exit_flag=True
                    if choice3 == ‘b‘:
                        break
                    elif choice3 == ‘q‘:
                        exit_flag = True
            if choice2 == ‘b‘:
                break
            elif choice2 == ‘q‘:
                exit_flag = True
    if choice == ‘q‘:
        exit_flag = True