Python os.walk() 方法



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/pythonimport osfor 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))

输出：

Let us compile and run the above program, this will scan all the directories and subdirectories bottom-to-up

./tmp/test.py./.bash_logout./amrood.tar.gz./.emacs./httpd.conf./www.tar.gz./mysql.tar.gz./test.py./.bashrc./.bash_history./.bash_profile./tmp

If you will change the value of topdown to True, then it will give you the following result:

./.bash_logout./amrood.tar.gz./.emacs./httpd.conf./www.tar.gz./mysql.tar.gz./test.py./.bashrc./.bash_history./.bash_profile./tmp./tmp/test.py