Python | os.get_blocking() method

OS module in Python provides functions for interacting with the operating system. OS comes under Python’s standard utility modules. This module provides a portable way of using operating system dependent functionality.

os.get_blocking() method in Python is used to get the blocking mode information of the specified file descriptor.

This method returns True if the os.O_NONBLOCK flag is unset which means that the specified file descriptor is in blocking mode and False if the os.O_NONBLOCK flag is set which means that the specified file descriptor is in non-blocking mode.

A file descriptor in blocking mode means that I/O system calls like read, write, or connect can be blocked by the system.
For example: If we call read system call on stdin then our program will get blocked (the kernel will put the process into the sleeping state) until data to be read is actually available on stdin.

Note: os.get_blocking() method is available on Unix platforms only.

Syntax: os.get_blocking(fd)

fd: A file descriptor whose blocking mode information is required.

Return Type: This method returns a Boolean value of class ‘bool’. True denotes that the file descriptor is in blocking mode while False denotes that the file descriptor is in non-blocking mode.

Code: Use of os.get_blocking() method to get the blocking mode of a file descriptor





# Python program to explain os.get_blocking() method 
# importing os module 
import os
# File path 
path = "/home / ihritik / Documents / file.txt"
# Open the file and get
# the file descriptor associated
# with it using method
fd =, os.O_RDWR)
# Get the blocking mode
# of the file descriptor
# using os.get_blocking() method
mode = os.get_blocking(fd)
if mode == True:
    print("File desciptor is in blocking mode")
else :
    print("File descriptor is in Non-blocking mode")
# Close the file descriptor



File desciptor is in blocking mode
My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using or mail your article to See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.

Article Tags :

Be the First to upvote.

Please write to us at to report any issue with the above content.