Python Level Three Menu example

Print province, city, and county level three menu can return to the previous level can exit the program at any time

__author__="Alex Li"Data= {    'Beijing':{        "changping":{            "Shahe":["Oldboy","Test"],            "Tin Tong Court":["Chain Home Property","I love my family ."]        },        "Chaoyang":{            "Wangjing":["Mercedes","mo Mo"],            "Guomao":{"CICC","HP"},            "Dong Zhi men":{"Advent","fetion"},        },        "Haidian":{},    },    'Shandong':{        "Texas":{},        "Qingdao":{},        "Jinan":{}    },    'Guangdong':{        "Dongguan":{},        "Changshu":{},        "Foshan": {},},}exit_flag=False while  notExit_flag: forIinchData:Print(i) Choice= Input ("choose to enter 1>>:")    ifChoiceinchData: while  notExit_flag: forI2inchData[choice]:Print("\ t", I2) Choice2= Input ("choose to enter 2>>:")            ifChoice2inchData[choice]: while  notExit_flag: fori3inchData[choice][choice2]:Print("\t\t", i3) Choice3= Input ("choose to enter 3>>:")                    ifChoice3inchData[choice][choice2]: forI4inchData[choice][choice2][choice3]:Print("\t\t", I4) Choice4= Input ("last layer, press B to return to >>:")                        ifChoice4 = ="b":                            Pass                        elifChoice4 = ="Q": Exit_flag=TrueifChoice3 = ="b":                         Break                    elifChoice3 = ="Q": Exit_flag=TrueifChoice2 = ="b":                 Break            elifChoice2 = ="Q": Exit_flag= True

Python Level Three Menu example