How to Raise an Exception in Python

In Python, exceptions are events that occur when an error arises while the program is running. These exceptions should be properly caught and handled, and Python provides several built-in exceptions.

Python allows us to manage these exceptions to prevent the abrupt termination of the program. This tutorial will guide you through the process of raising an exception in Python.

Step 1: Understand the Concept of Exceptions

An exception is an error that disrupts the flow of a program. When an error occurs in Python, an exception might be raised that triggers the program’s termination. By handling these exceptions, you can ensure your program continues executing even in the presence of errors.

Step 2: Use the “raise” Keyword

Python provides the raise keyword that allows you to manually trigger exceptions during the execution of your program. This is done by following the raise keyword with the name of the exception to be raised.

Step 3: Incorporating “try .. except” Blocks

The try..except blocks in Python are used to catch and handle exceptions. The code within the try block is executed, and if an exception is encountered in this block, the execution is passed to the corresponding except block.


This is an exception


Raising exceptions allows your Python program to handle error situations gracefully. You can customize your exceptions to fit the specific error conditions in your code. When handled correctly, these exceptions can prevent your code from abruptly breaking and even add more robustness to your scripts.

So, knowing how to raise and handle exceptions is an important skill in Python programming.