This document discusses Python directory navigation and file management. It shows how to use the os module to get the current working directory, list files in a directory, create and remove directories, check if an item is a file or directory, and traverse a directory listing files and their types. Code examples demonstrate os.getcwd(), os.listdir(), os.mkdir(), os.rmdir(), and os.path.isfile() and os.path.isdir() to interact with directories and files in Python.

1. Python for Ethical Hackers
Mohammad reza Kamalifard

2. Python Language Essentials
Module 2: System Programming
Part 2 :
Directory Navigation

3. Directory Details
Methods for traversing directories
Listing file and their information
Creating and deleting directories and files
Test to check if something is a file or directory

4. >>> import os
>>>
>>> os.getcwd()
'/home/reza/code/PYSEC101/dir'
>>>
>>>
>>>os.mkdir('class')
$ ls
Class jalase7 jalase7.py
os.rmdir()

5. >>> os.listdir('.')
['class', 'jalase7', 'jalase7.py']
>>>
>>> os.listdir('/')
['opt', 'initrd.img.old', 'lib', 'selinux', 'dev', 'home',
'initrd.img', 'lost+found', 'bin', 'usr', 'sys', 'lib64',
'windows', 'vmlinuz.old', 'proc', 'tmp', 'cdrom', 'run',
'sbin', 'mnt', 'root', 'boot', 'media', 'var', 'vmlinuz',
'etc', 'srv']
>>>

6. >>> for item in os.listdir('.'):
... if os.path.isfile(item):
... print item + ' is a file'
... elif os.path.isdir(item):
... print item + ' is a directory'
... else:
... print 'unknown'
...
Class is a directory
Jalase7 is a directory
jalase7.py is a file
>>>

7. This work is licensed under the Creative Commons
Attribution-NoDerivs 3.0 Unported License.
To view a copy of this license, visit http://creativecommons.org/licenses/by-nd/3.0/
Copyright 2013 Mohammad reza Kamalifard.
All rights reserved.