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Python os chflags() 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 chflags() method.

Python os chflags() method sets the flags of path to the numeric flags. The flags may take a mixture of various values described below.

Note - This method is available in Python version 2.6 onwards. Most of the flags can only be changed by super user only.


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

os.chflags(path,  flags)

Parameter Details

  • path - This is the complete path of the directory to be changed to a new location.
  • flags - The flag specified are formed by OR'ing the below values -
    • os.UF_NODUMP - Do not dump the file.
    • os.UF_IMMUTABLE - The file may be static and not changed.
    • os.UF_APPEND - The file may be appended to.
    • os.UF_NOUNLINK - The file may not be renamed or deleted.
    • os.UF_OPAQUE - The file directory is opaque when viewed through a union stack.
    • os.SF_ARCHIVED - The file may be archived.
    • os.SF_IMMUTABLE - The file may not be changed.
    • os.SF_APPEND - The file may be appended to.
    • os.SF_NOUNLINK - The file may not be deleted or renamed.
    • os.SF_SNAPSHOT - It is a snapshot file.

Return Value

It does not return any value.


The following below is a simple example -

import os
import stat

path = "/tmp/foo.txt"

# Set a flag so that file may not be renamed or deleted.
flags = os.SF_NOUNLINK
retval = os.chflags( path, flags)
print "Return Value: %s" % retval

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

Return Value : None

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

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