How to Fix: How do I declare custom exceptions in modern Python
Learn how to declare custom exception classes in modern Python, following the standard for Python 2.5 and above.
📋 Table of Contents
To declare custom exceptions in modern Python, you should create a new exception class that inherits from the base `Exception` class. This allows you to include extra data about the cause of the error.
🛑 Root Causes of the Error
- For example, let's create a custom exception class called `CustomError` that inherits from `Exception
🛠️ Step-by-Step Verified Fixes
Method 1: Creating a Custom Exception Class
- Step 1: Import the `Exception` class and create a new exception class called `CustomError
Method 2: Raising the Custom Exception
- Step 1: Raise the custom exception using the `raise` statement, passing in any relevant data as an argument
For example, you could raise a `CustomError` like this: raise CustomError('Something went wrong')
✨ Wrapping Up
When you catch the custom exception, you can access the extra data using the `args` attribute. For example: try: raise CustomError('Something went wrong')except CustomError as e: print(e.args[0])
❓ Frequently Asked Questions
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