Tuesday, August 4, 2020

Python os closerange() Method with example



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

os closerange() method closes all file descriptor from the fd_low to fd_high, ignoring any errors. This method was introduced to users in Python version 2.6.

Syntax

Below is the syntax for Python Os closerange() method -

os.closerange(fd_low,  fd_high);


Parameter Details

  • fd_low - The lowest file descriptor to be closed.
  • fd_high - The highest file descriptor to be closed.

This function is equivalent to -

for fd in xrange(fd_low, fd_high):
   try:
      os.close(fd)
   except OSError:
      pass

Return Value

It does not return any value.

Example

The following below is a simple example -


#!/usr/bin/python

import os, sys

# Open a file
fd = os.open( "foo.txt", os.O_RDWR|os.O_CREAT )

# Write one string
os.write(fd, "This is test")

# Close a single opened file
os.closerange( fd, fd)

print "Closed all the files successfully!!"

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

Closed all the files successfully!!


Alright guys! This is where we are rounding up for this tutorial post. In my next tutorial, we are going to be discussing about the Python OS dup() 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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