Handling OSError exception in Python (original) (raw)

Last Updated : 15 Jul, 2025

Let us see how to handle OSError Exceptions in Python. OSError is a built-in exception in Python and serves as the error class for the os module, which is raised when an os specific system function returns a system-related error, including I/O failures such as "file not found" or "disk full".

Below is an example of OSError:

Python `

Importing os module

import os

os.ttyname() method in Python is used to get the terminal

device associated with the specified file descriptor.

and raises an exception if the specified file descriptor

is not associated with any terminal device.

print(os.ttyname(1))

`

Output :

OSError: [Errno 25] Inappropriate ioctl for device

We can handle an OSError exception using try...except statements.

Python `

importing os module

import os

create a pipe using os.pipe() method

it will return a pair of

file descriptors (r, w) usable for

reading and writing, respectively.

r, w = os.pipe()

(using exception handling technique)

try to get the terminal device associated

with the file descriptor r or w

try : print(os.ttyname(r))

except OSError as error : print(error) print("File descriptor is not associated with any terminal device")

`

Output :

[Errno 25] Inappropriate ioctl for device File descriptor is not associated with any terminal device