Raymond Hettinger <raymond.hettin...@gmail.com> added the comment:
> there are other such mutable objects in python which do define > __hash__ = None such as list and dict Those objects compare on their contents, not on object identity. Take a look at how hashing works in dataclasses. You can have a mix of mutable and immutable fields as long as both __eq__ and __hash__ depend on only the immutable fields. Also, take a look at database cursor objects. Both __eq__ and __hash__ use object identity even though fetchone() advances the internal state (just like an iterator). Anyway, the breaking of existing working code makes this a non-starter. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38769> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
