Error Handling with Custom Exceptions in Python

Python offers a powerful and flexible way to handle errors through the use of exceptions.

While Python has built-in exceptions for common errors like FileNotFoundError or ValueError, developers can also define their own custom exceptions to handle specific types of errors in their applications.

Custom exceptions allow developers to provide more meaningful error messages, making it easier to debug issues.

To define a custom exception in Python, you can subclass the built-in Exception class.

This allows you to create specific exceptions for your application’s needs, such as DatabaseConnectionError, InvalidUserInputError, or FileParseError.

Custom exceptions can also include additional attributes or methods that provide more context, such as error codes or logging functionality.

By using custom exceptions, you can make your error handling more structured and readable.

Furthermore, custom exceptions allow you to differentiate between different types of errors, which is especially helpful in larger applications with complex logic.

It also enables you to separate concerns, letting you handle errors at different layers of your application appropriately.

Python’s custom exceptions are a key part of writing clean, maintainable, and debuggable code.