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Python: Get the name of the operating system, information of current operating system, current working directory, print files and directories

Python Operating System Services: Exercise-1 with Solution

Write a Python program to get the name of the operating system (Platform independent), information of current operating system, current working directory, print files and directories in the current directory and raises error in the case of invalid or inaccessible file names and paths.

Sample Solution:

Python Code :

import os
print("Operating System:",os.name)
print("\nInformation of current operating system: ",os.uname())
print("\nCurrent Working Directory: ",os.getcwd())
print("\nList of files and directories in the current directory:")
print(os.listdir('.'))
print("\nTest if a specified file exis or not:")
try:
   filename = 'abc.txt'
   f = open(filename, 'r')
   text = f.read()
   f.close()
except IOError:
   print('Not accessed or problem in reading: ' + filename)

Sample Output:

Operating System: posix

Information of current operating system:  posix.uname_result(sysname='Linux', nodename='b0e45c20d4ca', release='4.4.0-169-generic', version='#198-Ubuntu SMP Tue Nov 12 10:38:00 UTC 2019', machine='x86_64')

Current Working Directory:  /tmp/sessions/7ae3772408a46b98

List of files and directories in the current directory:
['main.py']

Test if a specified file exis or not:
Not accessed or problem in reading: abc.txt

Python Code Editor:

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Python: Tips of the Day

Find current directory and file's directory:

To get the full path to the directory a Python file is contained in, write this in that file:

import os 
dir_path = os.path.dirname(os.path.realpath(__file__))

(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)

To get the current working directory use

import os
cwd = os.getcwd()

Documentation references for the modules, constants and functions used above:

  • The os and os.path modules.
  • The __file__ constant
  • os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
  • os.path.dirname(path) (returns "the directory name of pathname path")
  • os.getcwd() (returns "a string representing the current working directory")
  • os.chdir(path) ("change the current working directory to path")

Ref: https://bit.ly/3fy0R6m