Handling OSError exception in Python

Last Updated : 08 Jun, 2022

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

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