Python Level Three Menu

Python level Three menu

• Demand

1. Print provincial, city, and county level three menus
2. Can return to the upper level
3. Can exit the program at any time

• Code implementation

1menu = {2     'Beijing':{3         'Haidian':{4             'Five crossing':{5                 'Soho':{},6                 'NetEase':{},7                 'Google':{}8             },9             'Zhongguancun':{Ten                 'Iqiyi Art':{}, One                 'Autohome':{}, A                 'Youku':{}, -             }, -             'on the ground':{ the                 'Baidu':{}, -             }, -         }, -         'changping':{ +             'Shahe':{ -                 'old boy':{}, +                 'Beihang University':{}, A             }, at             'Tin Tong Court':{}, -             'Huilongguan':{}, -         }, -         'Chaoyang':{}, -         'Dongcheng':{}, -     }, in     'Shanghai':{ -         'Minhang':{ to             "People's square":{ +                 'Fried Chicken Shop':{} -             } the         }, *         'Zhabei':{ $             'Train Warfare':{Panax Notoginseng                 'Ctrip':{} -             } the         }, +         'Pudong':{}, A     }, the     'Hubei':{ +         'Wuhan':{ -             'Optics Valley':{}, $             'Hanzhong St.':{}, $         }, -         'Yellowstone':{ -             'Huangshigang':{}, the             'Upper Kiln':{}, -         },Wuyi         'Daye':{ the             'Mall':{}, -             'Mine Head':{}, Wu         }, -         'Huanggang':{ About             'General County':{}, $         }, -     }, - } -  ACurrent_level = Menu#record the layer of the current loop +Last_levels = []#deposit the currently entered layer into the list the  -  whileTrue: $      forKinchCurrent_level:#Loop Current Layer the         Print(k) theChoice = input ("Please enter address >>:"). Strip () the     ifChoice = ='b': the         ifLen (last_levels) = = 0: Break #The list does not have a layer record or the vertex layer exits the program -Current_level = Last_levels[-1]#when entering B, remove the previous layer when exiting inLast_levels.pop ()#when you return to the previous layer, delete the record-level the     elifChoice = ='Q':#when entering Q, exit the program the exit () About     ifChoice not inchCurrent_level:Continue theLast_levels.append (Current_level)#current layer Join record list theCurrent_level = Current_level[choice]#Add the user input layer to the current layer and loop

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Python Level Three Menu