Hi,<br><br>While I would like to get such new attributes, I see drawbacks as blocker issues and so I am fine with this PEP rejection. Performance is too critical for most common exceptions.<br><br>For me one blocker issue is the high risk of creating reference cycles. And the weak reference API isn't the most practical :-(<br><br>Moreover I expect slowdown, whereas exceptions are already expensive :-( Recently, internal code to get an attribute has been reworked to avoid exception whenever possible, and it made the code faster.<br><br>Victor<br><br>Le vendredi 15 mars 2019, Brett Cannon <<a href="mailto:brett@python.org">brett@python.org</a>> a écrit :<br>> The steering council felt the PEP was too broad and not focused enough. Discussions about adding more attributes to built-in exceptions can continue on the issue tracker on a per-exception basis (and obviously here for any broader points, e.g. performance implications as I know that has come up before when the idea of storing relevant objects on exceptions).<br>> Thanks to Sebastian Kreft for taking the time to write the PEP in the first place.<br>><br><br>-- <br>Night gathers, and now my watch begins. It shall not end until my death.<br>