Python's three-tier menu

Three-level menu, based on the number selected by the user, into the sub-menu. First-level presentation.

1menu = {2     'Beijing': {3         "Chaoyang": {4             "CBD": ['CICC','CCTV'],5             "Jinrongjie": ["CT"],6             "Wangjing": ["Momo","Chuizi"]7         },8         "Haidian": ['Baidu','Youku']9     },Ten     'Shanghai': { One         "Pudong": ["Ctrip"," One Shop"], A         "Puxi": ["China Bank","America Bank"] -     } - } theExit_flag =False -  while  notExit_flag: -      forIndex, keyinchEnumerate (Menu.keys ()): -         Print(index, key) +Choice_1 = input ("Choose menu to enter:"). Strip () -     ifchoice_1.isdigit (): +Choice_1 =Int (choice_1) A  atKey_1 =list (Menu.keys ()) [Choice_1] -          while  notExit_flag: -              forIndex, keyinchEnumerate (menu[key_1]): -                 Print(' -', index, key) -choice_2 = input ("Choose menu to enter:"). Strip () -             ifchoice_2.isdigit (): inchoice_2 =Int (choice_2) -  toKey_2 =list (Menu[key_1].keys ()) [choice_2] +                  while  notExit_flag: -                      forIndex, keyinchEnumerate (menu[key_1][key_2]): the                         Print('-->-->', index, key) *Choice_3 = input ("Choose menu to enter:"). Strip () $                     ifchoice_3.isdigit ():Panax Notoginseng                         Print(" the ...") -                     elifChoice_3 = ='quit': theExit_flag =True +                     elifChoice_3 = =' Back': A                          Break the Else: +     Print("====going to quit====")

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Note: This version is Python3.0 version

Python's three-tier menu