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Python os.lchmod() Method with example

Hello dear readers! Welcome back to another section of our tutorial on Python. In this tutorial guide, we are going to be studying about the Os lchmod() method.

The Python os lchmod() method changes the mode of the path to the numeric mode. If path is a symlink, this affects the symlink rather than the target.

Note - This method is available on Python version2.6 onwards.


The following below is the syntax for Python Os lchmod() method -

os.lchmod(path,  mode);

RECOMMENDED POST: Python os.lchflags() Method

Parameter Details

  • path - The file path for which mode is to be set.
  • mode - It may take one of the below mentioned values or bitwise ORed combinations of them.
    • stat.S_ISUID - It sets the user ID on execution.
    • stat.S_ISGID - It sets the group ID on execution.
    • stat.S_ENFMT - The record locking is enforced.
    • stat.S_ISVTX - Save text image after execution.
    • stat.S_IREAD - Read by owner.
    • stat.S_IWRITE - Write by owner.
    • stat.S_IEXEC - Execute by owner.
    • stat.S_IRWXU - Read, write, and as well execute by owner.
    • stat.S_IRUSR - Read by owner.
    • stat.S_IWUSR - Write by owner.
    • stat.S_IXUSR - Execute by owner.
    • stat.S_IRWXG - Read, write, and also execute by group.
    • stat.S_IRGRP - Read by group.
    • stat.S_IWGRP - Write by group.
    • stat.S_IXGRP - Execute by group.
    • stat.S_IRWXO - Read, write, and also execute by others.
    • stat.S_IROTH - Read by others.
    • stat.S_IWOTH - Write by others.
    • stat.S_IXOTH - Execute by others.

Return Value

It does not return any value.


The following below is a simple example -


import os, sys

# Open a file
path = "/var/www/html/foo.txt"
fd = os.open( path, os.O_RDWR|os.O_CREAT )

# Close opened file
os.close( fd )

# Now change the file mode.
# Set a file execute by group.
os.lchmod( path, stat.S_IXGRP)

# Set a file write by others.
os.lchmod("/tmp/foo.txt", stat.S_IWOTH)

print "Changed mode successfully!!"

When the above code is executed, it will produce the following result -

print "Changed mode successfully!!"

Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial, we are going to be studying about Python the OS lchown() Method.

Feel free to ask your questions where necessary and i will attend to them as soon as possible. If this tutorial was helpful to you, you can use the share button to share this tutorial.

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Thanks for reading and bye for now.

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