Marc-Andre Lemburg <m...@egenix.com> added the comment:
On 22.09.2021 21:02, Raymond Hettinger wrote: >> The language specification says that the dicts maintain insertion >> order, but the wording implies that this only to explicit >> dictionaries, not instance attribute or other namespace dicts. > > That is a quite liberal reading of the spec. I would object to making > instance and namespace dicts behave differently. That would be a behavior > regression and we would forever have to wrestle with the difference. I agree. Keeping the insertion order is essential for many common use cases, including those where a class or instance dict is used, e.g. namespaces used for data records, data caches, field definitions in data records, etc. (and yes, those often can be dynamically extended as well :-)). I think for the case you mention, a documentation patch would be better and more helpful for the programmers. Point them to slots and the sharing problem should go away in most cases :-) ---------- nosy: +lemburg _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue40116> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
