Python third-level directory display method

Requirements:

1. Three-level menu

2. You can choose to enter each submenu in turn and select the serial number to enter the directory

3. Enter b to return to the upper-level directory, and q to exit the changed directory

Code implementation:

#！/bin/env python
#!--*--coding:utf-8 --*--
# ----*auth:freem*
import sys
#flag=True
#def flas():
#flag=False;
#定义字典包括，国家，州（省），市
dic={'中国':{'河北':('石家庄','邢台','衡水',),'北京':('昌平','海淀','朝阳',),'山西':('太原','大同','运程',)},'美国':{'纽约州':('纽约市','罗彻斯特','水牛城',),'加利福利亚州':('洛杉矶','好莱坞','阿罕布拉',),'宾夕法尼亚州':('费城','伯利恒','华盛顿',)},'澳大利亚':{'维多利亚州':('墨尔本','吉朗','巴里迪',),'西澳大利亚州':('马扎尔','柏斯','费里曼图',),'南澳大利亚州':('阿德莱德','内陆','巴罗莎'),}}
#print(dic['中国']['河北'])
dic_dir={1:"中国",2:"美国",3:"澳大利亚",} #定义国家跟序号的对应关系
dic_dirtt={1:("河北","北京","山西"),2:("纽约州","加利福利亚州","宾夕法尼亚州",),3:("维多利亚州","西澳大利亚州","南澳大利亚州",)} #省（州）对应关系
#dic_dir01={1:"中国",2:"美国",3:"澳大利亚",}
#dic_dir02={1:"中国",2:"美国",3:"澳大利亚",}
'''for i in range(1,dic.__len__()+1):
print(i,":",dic.pop())'''
#print(dic["中国"]["河北"][1])
#print(["河北"][1])
def loop():
while True:
for i in range(1,dic.__len__()+1): #遍历字典长度，生成序号
print(i,':',dic_dir[i])
dir01=input("please input num or q[quit]:",)#选择对应序号输入以及输入返回上级目录标识
if dir01 in ['1','2','3']:#确认输入序号是否在['1','2','3']中
for j in range(1,dic.__len__()+1):
if int(dir01)==j:
print(">>",j,':',dic_dir[j],"\n") #打印所序号所对应的国家
for i in range(1, dic[dic_dir[j]].__len__() + 1):
print(">>>>",i, ':',dic_dirtt[j][i-1]) #遍历输出所选序号国家对应的省/州
dir02 = input("please input num or b[back] or q[quit]:", )#输入上级所需国家对应的省的序号
if dir02 in ['1', '2', '3']:
for k in range(1, dic[dic_dir[j]].__len__() + 1):#遍历省所对应字典所对应的长度，生成序号
if int(dir02) == k:
print("*******",k,":",dic_dirtt[j][k-1],"\n")
for h in range(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])#打印最终选择的省所对应的城市
print("------------------------------------------------")
# print(k, ':',dic_dirtt[j][k])
elif dir02=='b':
continue; #跳出上一级循环
elif dir02=='q':
return #跳出整个循环
#return False;
else:
print("please insert correct str,strat with higher dir!")
#print(i, ':', dic[dic_dir[j]])
# print(dic[dic_dir[j]])
elif dir01=='q':
break; #退出
else:
print("please insert correct str!")
if __name__=="__main__":
loop()

Implementation effect:

1) Enter normally, enter the serial number 1 respectively, and display the subordinate directory of "China", then enter 1 to display the subordinate directory of "Hebei", as shown in the following figure:

2), directly enter [q] to exit the program, as shown in the figure below:

3), first level Enter the directory normally, enter [b] in the second-level directory, and return to the upper-level directory, as shown in the following figure:

4), enter the first-level directory normally, Enter [q] in the second-level directory to exit the entire program directly, as shown in the following figure:

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

The above is the implementation method of Python three-level directory display introduced by the editor. I hope it will be helpful to you. If you If you have any questions, please leave me a message and I will reply to you in time. I would also like to thank you all for your support of the PHP Chinese website!

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