Python traverse all files and directories in a folder

Walking through all subfolders and subfiles in a folder is very simple using the os.walk() method.
The syntax is roughly as follows:

os.walk(top[, topdown=True[, onerror=None[, followlinks=False]]])
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  • top - For each folder in the root directory (including itself), generate a 3-tuple (dirpath, dirnames,
    filenames) [folder path, folder name, filename].
  • topdown – optional, true or not specified, a directory's 3-tuple will be generated before any of its subfolders' 3-tuple
    (directory top-down). If topdown is False, the 3-tuple of a directory will be generated after the 3-tuple of any of its subfolders (directories bottom-up).
  • onerror – optional, is a function; it is called with one parameter, an instance of OSError. After reporting this error, continue the walk, or throw an exception to terminate the walk.
  • followlinks – set to true to access directories via soft links.

The example is as follows:
Display all files in a directory

#conding=utf8  
import os 

g = os.walk(r"e:\test")  

for path,dir_list,file_list in g:  
    for file_name in file_list:  
        print(os.path.join(path, file_name) )
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show all subdirectories

#conding=utf8  
import os 

g = os.walk("e:\test")  

for path,dir_list,file_list in g:  
    for dir_name in dir_list:
        print(os.path.join(path, dir_name) )
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