Custom Exceptions

Custom exceptions allow you to create application-specific error types that convey more meaningful information about errors in your domain. You create custom exceptions by defining new classes that inherit from Python's Exception class or its subclasses. Custom exceptions should typically be named with an 'Error' suffix following Python conventions. You can raise exceptions using the raise statement, either with built-in exceptions or your custom ones. Custom exceptions can have additional attributes to provide more context about the error. They're particularly useful for library code where you want users to catch specific exceptions related to your library's functionality. When creating custom exceptions, consider the exception hierarchy and inherit from the most appropriate built-in exception class. Custom exceptions make error handling more precise and self-documenting, as the exception type itself conveys information about what went wrong, and additional attributes can provide context for proper handling.