[Python-Dev] with_traceback

[Michael Foord]

Andrew Dalke wrote:
> On 2/28/07, James Y Knight <foom at fuhm.net> wrote:
>   
>> It seems to me that a stack trace should always be attached to an
>> exception object at creation time of the exception, and never at any
>> other time. 
Sounds good in principle - but don't forget that normally the exception 
will be instantiated and *then* passed to the raise statement.

I've never seen a module level exception instance before. With the 
proposed changes, modules that do this would *continue* to work, surely 
? So they lose nothing (compared to the current situation) by having the 
traceback information overwritten, they just can't take direct advantage 
of the new attribute.

Michael Foord