Everyone, Given the resounding silence I'm inclined to submit this to the Steering Council. While I'm technically a co-author, Irit has done almost all the work, and she's done a great job. If there are no further issues I'll send this SC-wards on Monday.
--Guido On Sat, Mar 20, 2021 at 10:05 AM Irit Katriel <iritkatr...@googlemail.com> wrote: > > We would like to present for feedback a new version of PEP 654, which > incorporates the feedback we received in the discussions so far: > https://www.python.org/dev/peps/pep-0654/ > The reference implementation has also been updated along with the PEP. > > The changes we made since the first post are: > > 1. Instead of ExceptionGroup(BaseException), we will have two new builtin > types: BaseExceptionGroup(BaseException) and > ExceptionGroup(BaseExceptionGroup, Exception). > This is so that "except Exception" catches ExceptionGroups (but not > BaseExceptionGroups). BaseExceptionGroup.__new__ inspects the wrapped > exceptions, and if they are all Exception subclasses, it creates an > ExceptionGroup instead of a BaseExceptionGroup. > > 2. The exception group classes are not final - they can be subclassed and > split()/subgroup() work correctly if the subclass overrides the derive() > instance method as described here: > https://www.python.org/dev/peps/pep-0654/#subclassing-exception-groups > > 3. We had some good suggestions on formatting exception groups, which we > have implemented as you can see in the output shown for the examples in the > PEP. > > 4. We expanded the section on handling Exception Groups, to show how > subgroup can be used (with side effects) to do something for each leaf > exception, and how to iterate correctly when the tracebacks of leaf > exceptions are needed: > https://www.python.org/dev/peps/pep-0654/#handling-exception-groups > > 5. We expanded the sections on rationale and backwards compatibility to > explain our premise and expectations regarding how exception groups will be > used and how the transition to using them will be managed. > > 6. We added several items to the rejected ideas section. > > We did not receive any comments (or make any changes) to the proposed > semantics of except*, hopefully this is because everyone thought they are > sensible. > > Irit, Yury and Guido > > -- --Guido van Rossum (python.org/~guido) *Pronouns: he/him **(why is my pronoun here?)* <http://feministing.com/2015/02/03/how-using-they-as-a-singular-pronoun-can-change-the-world/>
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