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Python: Create a symbolic link and read it to decide the original file pointed by the link

Python Operating System Services: Exercise-6 with Solution

Write a Python program to create a symbolic link and read it to decide the original file pointed by the link.

Sample Solution:

Python Code :

import os
path = '/tmp/' + os.path.basename(__file__)
print('Creating link {} -> {}'.format(path, __file__))
os.symlink(__file__, path)
stat_info = os.lstat(path)
print('\nFile Permissions:', oct(stat_info.st_mode))
print('\nPoints to:', os.readlink(path))
#removes the file path
os.unlink(path)

Sample Output:

Creating link /tmp/main.py -> /tmp/sessions/af6c4b4e3816cd19/main.py

File Permissions: 0o120777

Points to: /tmp/sessions/af6c4b4e3816cd19/main.py

Python Code Editor:

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Previous: Write a Python program to get the size, permissions, owner, device, created, last modified and last accessed date time of a specified path.
Next: Write a Python program to create a file and write some text and rename the file name.

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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