How Do You Write An Error Message In Python?

Python's implicit special case classes don't address specific blunder circumstances that might emerge in your code. In such cases, you'll have to make custom exemptions for handle these blunders successfully.

In Python, you can characterize custom exemptions and raise them when explicit mistake circumstances happen. You can oversee explicit, instructive mistakes with custom exemptions, working on your code's intelligibility and practicality.

Why Do You Need Custom Exceptions?

During the advancement of an application, different blunder situations can emerge because of changes in the code, combination with different bundles or libraries, and cooperations with outside applications. It is significant to deal with these blunders to smoothly recuperate from them or handle disappointment.

Python offers a scope of implicit special case classes that cover blunders like ValueError, TypeError, FileNotFoundError, from there, the sky is the limit. While these implicit special cases work well for their motivation, they may just some of the time precisely address the mistakes that can happen in your application.

By making custom exemptions, you can fit them explicitly to suit the necessities of your application and give data to engineers who use your code.

How to Define Custom Exceptions

To make custom special cases, characterize a Python class that acquires from the Exemption class. The Exemption class offers base usefulness you'll have to deal with special cases, and you can tweak it to add highlights in view of your particular necessities.

While making custom exemption classes, keep them straightforward while including essential ascribes for putting away blunder data. Exemption overseers can then get to these qualities to suitably deal with mistakes.

Here is a custom special case class, MyCustomError:

class MyCustomError(Exception):
    def __init__(self, message=None):
        self.message = message
        super().__init__(message)

This class acknowledges a discretionary message contention during introduction. It utilizes the super() strategy to call the constructor of the base Special case class, which is fundamental for exemption taking care of.

How to Raise Custom Exceptions?

To raise a blunder, utilize the raise catchphrase followed by an occurrence of your custom special case class, passing it a mistake message as a contention:

if True:
    raise MyCustomError("A Custom Error Was Raised!!!.")

You can also raise the error without passing any arguments:

if True:
    raise MyCustomError # shorthand