Скачать или смотреть Defining a Custom Exception Class

Creating a custom exception in Python is a straightforward process that begins with defining a new class. This class should inherit from Python's built-in `Exception` class, which is the standard base class for all exceptions. Let's walk through the steps: First, define a new class with a descriptive name that reflects the error it represents. For example, if you're creating an exception for invalid user input, you might name it `InvalidUserInputError`. This naming convention not only makes your code more readable but also helps other developers understand the error's purpose at a glance. Next, implement the `__init__` method to initialize the exception class. This method typically accepts a message parameter that provides a detailed description of the error. You can store this message in an instance attribute to ensure it's accessible when the exception is caught. Optionally, you can add additional attributes to store more context about the error, such as an error code or related data. By structuring your custom exceptions in this way, you enhance your application's error handling capabilities, making it easier to maintain and debug. We'll explore code examples to illustrate these concepts in action, demonstrating how to seamlessly integrate custom exceptions into your Python projects.