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Python 3 - os.walk() Method
Description
The method walk() generates the file names in a directory tree by walking the tree either top-down or bottom-up.
Syntax
Following is the syntax for walk() method −
os.walk(top[, topdown = True[, onerror = None[, followlinks = False]]])
Parameters
top − Each directory rooted at directory, yields 3-tuples, i.e., (dirpath, dirnames, filenames)
topdown − If optional argument topdown is True or not specified, directories are scanned from top-down. If topdown is set to False, directories are scanned from bottom-up.
onerror − This can show error to continue with the walk, or raise the exception to abort the walk.
followlinks − This visits directories pointed to by symlinks, if set to true.
Return Value
This method does not return any value.
Example
The following example shows the usage of walk() method.
# !/usr/bin/python3
import os
os.chdir("d:\\tmp")
for root, dirs, files in os.walk(".", topdown = False):
for name in files:
print(os.path.join(root, name))
for name in dirs:
print(os.path.join(root, name))
Result
Let us compile and run the above program, this will scan all the directories and subdirectories bottom-to-up
.\python2\testdir\Readme_files\Lpt_Port_Config.gif .\python2\testdir\Readme_files\ParallelPortViever.gif .\python2\testdir\Readme_files\softcollection.css .\python2\testdir\Readme_files\Thumbs.db .\python2\testdir\Readme_files\Yellov_Ball.gif .\python2\testdir\Readme.htm .\python2\testdir\Readme_files .\python2\testdir .\Applicationdocs.docx .\book.zip .\foo.txt .\java.ppt .\python2
If you will change the value of topdown to True, then it will give you the following result −
.\Applicationdocs.docx .\book.zip .\foo.txt .\java.ppt .\python2 .\python2\testdir .\python2\testdir\Readme.htm .\python2\testdir\Readme_files .\python2\testdir\Readme_files\Lpt_Port_Config.gif .\python2\testdir\Readme_files\ParallelPortViever.gif .\python2\testdir\Readme_files\softcollection.css .\python2\testdir\Readme_files\Thumbs.db .\python2\testdir\Readme_files\Yellov_Ball.gif