Python beginner 13th Day Level Three menu program small job

13day

Job Title: Level Three menu

Job Requirements:

 data structure: Menu = {' Beijing ': {' Haidian ': {' Five crossings ': {' Soho ': {}, ' NetEase                ': {}, ' Google ': {}}, ' Zhongguancun ': {' Iqiyi ': {}, ' Autohome ': {},            ' Youku ': {},}, ' on the ground ': {' Baidu ': {},},}, ' Changping ': {        ' Shahe ': {' old boy ': {}, ' Beihang ': {},}, ' Tian Tong Yuan ': {}, ' Huilongguan ': {},            }, ' Chaoyang ': {}, ' Dongcheng ': {},}, ' Shanghai ': {' Minhang ': {' People's Square ': {' Fried chicken Shop ': {} }}, ' Zhabei ': {' rail war ': {' Ctrip ': {}}}, ' Pudong ': {},}, ' Shandong ': { },} Requirements: You can choose to go to each submenu from any level back to the previous layer you can exit the program from any level required new knowledge points: List, dictionary 
 
 

 menu = {
 ' Beijing ': {
 ' Haidian ': {
 ' five crossing ': {
 ' Soho ': {}, 
 ' NetEase '                : {}, 
 ' Google ': {} 
}, 
 ' Zhongguancun ': {
 ' Iqiyi ': {}, 
            ' Autohome ': {}, 
 ' Youku ': {}, 
}, 
 ' On the ground ': {
 ' Baidu ': {}, 
 }, 
}, 
 ' Changping ': {
 ' Shahe ': {
 ' old boy ': {}, 
 ' Beihang ': {},
}, 
 ' Tin tong Yuan ': {}, 
 ' Huilongguan ': {}, 
}, 
 ' Chaoyang ': {}, 
 ' Dongcheng ': {},
}, 
 ' Shanghai ': {
 ' Minhang ': {
 "People's Square": {
 ' Fried chicken Shop ': {} 
} 
}, 
 ' Zhabei ': {
 ' train war ': {
 ' Ctrip ': {} 
} 
}, 
 ' Pudong ': {},
}, 
 ' Shandong ': {}, 
} 
 
 

Layer = Menu
Last_layer = []
While True:
    For k in layer:
        Print (k)
    Choice = input (">>:"). Strip ()  
    If choice in layer:
        Last_layer.append (layer)   #记录父节点
        Layer = Layer[choice]      #更改变量
    Elif Not choice:
        Continue
    elif Choice = = ' Q ':           
        If Len (Last_layer) > 0:
            Layer = Last_layer.pop ()     #删除缓存的父节点 and returns the parent node
        Else
            Print ("Top Up!") ")
    elif Choice = = ' Q ':
        Break
    Else
        Print ("wrong input!") ")

Python beginner 13th Day Level Three menu program small job