Extract traceback info from an exception object

Question

Given an Exception object (of unknown origin) is there way to obtain its traceback? I have code like this:

def stuff():
   try:
       .....
       return us         


        

Answer 1

Since Python 3.0[PEP 3109] the built in class Exception has a __traceback__ attribute which contains a traceback object (with Python 3.2.3):

>>> try:
...     raise Exception()
... except Exception as e:
...     tb = e.__traceback__
...
>>> tb

The problem is that after Googling __traceback__ for a while I found only few articles but none of them describes whether or why you should (not) use __traceback__.

However, the Python 3 documentation for raise says that:

A traceback object is normally created automatically when an exception is raised and attached to it as the __traceback__ attribute, which is writable.

So I assume it's meant to be used.