[Python-Dev] PEP 344: Exception Chaining and Embedded Tracebacks

[Guido van Rossum]

Here's another rule-of-thumb: when the VM and the user *share* the
attribute space of an object, the VM uses system attributes; the VM
uses plain attributes for objects that it owns completely (like code
objects, frames and so on, which rarely figure user code except for
the explicit purpose of introspection). So I think the PEP should
continue to use __traceback__ etc.

On 5/17/05, Greg Ewing <greg.ewing at canterbury.ac.nz> wrote:
> Guido van Rossum wrote:
> 
> > Unfortunately I can't quite decide whether either rule applies in the
> > case of exceptions.
> 
> I think you'd at least be justified in using the "magic" rule,
> since they're set by the exception machinery.

-- 
--Guido van Rossum (home page: http://www.python.org/~guido/)