I found this question/answer on Stack Overflow: http://stackoverflow.com/questions/15123137
but after fiddling around with it, I can't find a solution that works for Python 3.2 and 3.3, let alone 2.x. In 3.2, exceptions have both __cause__ and __context__ attributes. I tried setting both to None (in 3.2), but I still get the full double traceback: >>> try: 1/0 ... except ZeroDivisionError: ... exc = TypeError() ... exc.__context__ = None ... exc.__cause__ = None ... raise exc ... Error in sys.excepthook: IndexError: tuple index out of range Original exception was: Traceback (most recent call last): File "<stdin>", line 1, in <module> ZeroDivisionError: division by zero During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<stdin>", line 6, in <module> TypeError The sys.excepthook error is because I have a custom interactive sys.excepthook, which is itself apparently broken in Python 3.2. I've looked at PEP 409 and 415, but just get more confused. *sigh* Maybe I'll try again tomorrow when I've had a bit of sleep... and take a closer look at Ethan's suggestion. Skip -- http://mail.python.org/mailman/listinfo/python-list