TIL: Exception.add_note

Python 3.11 introduced a new method called `add_note` for exceptions, which allows you to add extra information to exceptions in an easy, intuitive way. ```python try: 1/0 except ZeroDivisionError as e: e.add_note("This is a note about the error") e.add_note("This is another note") e.add_note("All notes must be strings") raise ``` The output will look something like this: ```plaintext ========================================================= ZeroDivisionError Traceback (most recent call last) Cell In[1], line 2 1 try: ====> 2 1/0 3 except ZeroDivisionError as e: 4 e.add_note("This is a note about the error") ZeroDivisionError: division by zero This is a note about the error This is another note All notes must be strings ``` See those last three lines? Those are the notes we added to the exception! The `add_note` allows for adding extra info without overriding the normal error, printing after the rest of the exception. The notes must be strings, and are stored in a list at the `__notes__` attribute. Finally, technically speaking, `add_note` is a method of the `BaseException` class, which is the base class for Python exceptions. This means that we can use it with any and all Python exceptions.