Change Default Handling for Exception class in Python

Question

I have a simple question with a likely more complicated answer.

I wrote a custom Exception class in Python:

class MyError(Exception):
  def __init__(self, message, other_info):
    Exception.__init__(self, message)
    self.other_info = other_info

What I would like to do is alter the default handling of this exception to include the information in other_info, but I want to keep it out of the main Exception message for organization's sake.

I have seen a post on how to override sys.excepthook entirely, but I don't want to change how it works -- I just want to change the way MyError is handled. Is this possible?

Answer 1

I am trying to understand what you meant by alter the default handling and guessed that you want the exception message to display self.other_info instead of self.message. If that is the case, modify the class to add the __str__ function:

class MyError(Exception):
    def __init__(self, msg, other_info):
        Exception.__init__(self, msg)
        self.other_info = other_info
    def __str__(self):
        return '<MyError: {}>'.format(self.other_info)
        # Or, simply:
        # return self.other_info