So, forgive me my relatively simple mental model about ExceptionGroup. I still try to create one for daily use.
As noted in the discussion, an EG provides a way to collect exceptions from different sources and raise them as a bundle. They have no apparent relation up until this point in time (for whatever reason they have been separate and for whatever reason they are bundled now). The result would be a tree graph in any case. A usual datastructure for a tree is to store all child nodes at the parent node. That was the idea behind the content of BaseException.__group__: it’s the list of child exceptions bundled at a specific point in time and raise as such a bundle. So all exceptions could become EGs with the additional semantics you‘ve described in the PEP. Illustrative Example: >>> bundle_exc.__group__ [IOError(123), RuntimerError(‘issue somewhere’)] I was wondering what of the PEP could be removed to make it simpler and more acceptable/less confusing (also looking at reactions from Twitter etc.) and I found these additional classes to be a part of it. Additionally, I fail to see how to access these bundled exceptions in an easy manner like __cause__ and __context__. (As the PEP also referring to them). So, I removed the classes and added a regular attribute. The reason I brought this up what the section “rejected ideas” didn’t showed anything in this direction (or I managed to missed that). Sven > > On 20. Apr 2021, at 22:05, Irit Katriel <iritkatr...@yahoo.com> wrote: > > Hi Sven, > > I don’t follow. What would the value of __group__ be and how would it work? > > Irit > >> On 20 Apr 2021, at 20:44, srku...@mail.de wrote: >> >> Hi Irit, >> reading this subthread specifically, I just got a wild idea and I couldn‘t >> find any related information in the PEP: >> Why not extending BaseException by __group__ among __cause__ and __context__? >> Would this reduce some of the added complexity and thus increase broader >> acceptance? >> Cheers, >> Sven _______________________________________________ Python-Dev mailing list -- python-dev@python.org To unsubscribe send an email to python-dev-le...@python.org https://mail.python.org/mailman3/lists/python-dev.python.org/ Message archived at https://mail.python.org/archives/list/python-dev@python.org/message/4NUG6R36HN557AY36SPINNRFRYBW4QM7/ Code of Conduct: http://python.org/psf/codeofconduct/
