Python_ achieve Level Three catalog display

Requirements:

1, Level three menu

2, you can choose to enter the sub-menu, select the serial number into the directory

3, enter B to return to the parent directory, q exit change directory

Code implementation:

1 #! /bin/env python2 #!--*--coding:utf-8--*--3 #----*auth:freem*4 ImportSYS5 #flag=true6 #def flas ():7     #Flag=false;8 #definition dictionary includes, State, state (province), City9dic={'China':{'Hebei':('Shijiazhuang','Xingtai','Hengshui',),'Beijing':('changping','Haidian','Chaoyang',),'Shanxi':('Taiyuan','Datong','Shipping Process',)},'United States':{'New York State':('New York',' Rochester','Buffalo',),'California':('Los Angeles','Hollywood','Alhambra',),'Pennsylvania State':('Philadelphia','Bethlehem','Washington',)},'Australia':{'Victoria':('Melbourne','Geelong','Barry Dee',),'State Of Western Australia':('Mazar','Perth','Freeman Chart',),'South Australia':('Adelaide','Inland','Barossa'),}}Ten #print (dic[' China ' [' Hebei ']) OneDic_dir={1:"China", 2:"United States", 3:"Australia",}#define the correspondence between the country and the serial number ADic_dirtt={1: ("Hebei","Beijing","Shanxi"), 2: ("New York State","California","Pennsylvania State",), 3: ("Victoria","State Of Western Australia","South Australia",)}#Province (state) correspondence relationship - #dic_dir01={1: "China", 2: "United States", 3: "Australia",} - #dic_dir02={1: "China", 2: "United States", 3: "Australia",} the " "For i in range (1,dic.__len__ () +1): - Print (I, ":", Dic.pop ())" " - #print (dic["China" ["Hebei"][1]) - #print (["Hebei"][1]) + defLoop (): -      whileTrue: +          forIinchRange (1,dic.__len__() +1):#Traverse dictionary length, generate sequence number A             PrintI':', Dic_dir[i]) atDir01=input ("Please input num or q[quit]:",)#Select the corresponding ordinal input and input to return to the parent directory ID -         ifDir01inch['1','2','3']:#confirm that the input sequence number is in [' 1 ', ' 2 ', ' 3 '] -              forJinchRange (1,dic.__len__() +1): -                 ifint (DIR01) = =J: -                     Print(">>"J':', Dic_dir[j],"\ n")#print the country corresponding to the serial number -                      forIinchRange (1, dic[dic_dir[j]].__len__() + 1): in                         Print(">>>>"I':', Dic_dirtt[j][i-1])#Traverse output selected serial number the state corresponding to the province/State -Dir02 = input ("Please input num or b[back] or Q[quit]:", )#Enter the serial number of the province corresponding to the desired country to                     ifDir02inch['1','2','3']: +                          forKinchRange (1, dic[dic_dir[j]].__len__() + 1):#traverse the length of the dictionary corresponding to the province, generating the sequence number -                             ifint (dir02) = =K: the                                 Print("*******"K":", Dic_dirtt[j][k-1],"\ n") *                                  forHinchRange (1, dic[dic_dir[j]][dic_dirtt[j][k-1]].__len__() + 1): $                                     Print("******* ^_^ >>>>"H':', Dic[dic_dir[j]][dic_dirtt[j][k-1]][h-1])#print the city corresponding to the province of the final selectionPanax Notoginseng                                 Print("------------------------------------------------") -                                #print (k, ': ', dic_dirtt[j][k]) the                     elifdir02=='b': +                         Continue;#jump out of the top loop A                     elifdir02=='Q': the                         return #jump out of the loop +                             #return False; -                     Else: $                         Print("Please insert correct str,strat with higher dir!") $                  #print (i, ': ', Dic[dic_dir[j]]) -                    #print (Dic[dic_dir[j]]) -         elifdir01=='Q': the               Break;#Exit -         Else:Wuyi             Print("Please insert correct str!") the  - if __name__=="__main__": WuLoop ()

Implementation results:

1) Normal input, enter the serial number 1 respectively, show "China" sub-directory, and then enter 1, showing "Hebei" sub-directory, as shown:

2), direct input [Q], exit the program as shown:

3), the first level directory normal input, the second level directory input [b], return to the parent directory, as shown in:

4), the first level directory normal input, the second level directory input [Q], directly exit the entire program, as shown in:

Note: This procedure is only applicable to python3.0 above, if python2.7, please modify it yourself;

If interested, please try it yourself;

Python_ achieve Level Three catalog display