Python Practice _module01-1-3-level menu _2

Another way to implement level 3 menus: looping

The way of the function: http://www.cnblogs.com/jailly/p/6709573.html

1. First create a dictionary that indicates the mapping relationship between the level 3 directory structure, and then save it to a pickle file to invoke

1 ImportPickle2 3Dir_windows = ['Explorer.exe']4Part_c = {'Windows': Dir_windows}5 6Dir_setup = ['Rhel-7.3.iso','Securecrt6.rar']7Dir_program = ['Putty.exe','PhotoshopCC2016.exe']8Part_d = {'Setup': Dir_setup,' Program': Dir_program}9 TenDir_video = ['June's name は.mp4'] OneDir_game = ['Nier:automata','Sid meier\ ' s civilization VI'] APart_e = {'Video': Dir_video,'Game': Dir_game} -  -Root = {'C': Part_c,'D': Part_d,'E': Part_e} the  -With open ('DIR.PKL','WB') as F: -Pickle.dump (ROOT,F)

2. Main program

1 #!/usr/bin/env Python32 #-*-coding:utf-8-*-3 #author:jailly4 5 " "6 The directory structure of level 3 to simulate the level three menu, the directory structure is as follows:7 C8 Windows9 Explorer.exeTen D One Setup A Rhel-7.3.iso - Securecrt6.rar -  Program the Putty.exe - PhotoshopCC2016.exe - E - Video + June's name は.mp4 - Game + Nier:automata A Sid Meier ' s civilization VI at " " -  - ImportPickle -  - defMain (Root): -n = 1 inSelect1 =None -Select2 =None toSELECT3 =None +  -      whileN: the         ifn = = 1: *             if  notSelect1: $                 Print('Welcome to the level%d directory, which has the following directory/file:%s'% (n,','. Join (Sorted (Root.keys () )))Panax NotoginsengSelect1 = input ('Please select the action you want to perform: ("[Directory Name]": Enter directory; "q": Exit):') -  the             ifSelect1inchRoot: +n = 2 A                 Continue the             elifSelect1 = ='Q': +                  Break -             Else: $Select1 = input ('command input error, please re-enter:') $                 Continue -  -         elifn = = 2: the             if  notSelect2: -                 Print('Welcome to the level%d directory, which has the following directory/file:%s'% (n,','. Join (Sorted (Root[select1].keys () )))WuyiSelect2 = input ('Please select the action you want to perform: ("[Directory Name]": Enter directory; "B", return to the previous level; "Q": Exit):') the  -             ifSelect2inchRoot[select1]: Wun = 3 -                 Continue About             elifSelect2 = ='b': $n = 1 -                 Continue -             elifSelect2 = ='Q': -                  Break A             Else: +Select2 = input ('command input error, please re-enter:') the                 Continue -  $         elifn = = 3: the             if  notselect3: the                 Print('Welcome to the level%d directory, which has the following directory/file:%s'% (n,','. Join (Sorted (ROOT[SELECT1][SELECT2) ))) theSELECT3 = input ('Please select the action you want to perform: ("B", return to the previous level; "Q": Exit):') the  -             ifSelect3 = ='b': inn = 2 the                 Continue the             elifSelect3 = ='Q': About                  Break the             Else: theSELECT3 = input ('command input error, please re-enter:') the                 Continue +  - if __name__=='__main__': the BayiWith open ('DIR.PKL','BR') as F: theRoot =pickle.load (f) the  -Main (Root)

Python Practice _module01-1-3-level menu _2