[issue12445] dict view values objects are missing tp_richcmp and tp_as_number

[Julian Berman]

Julian Berman <Julian+Python.org at GrayVines.com> added the comment:

Yes I know *why* it worked in Py2 -- still seems like an oversight :)

To me, comparing (multi)set-like is the only reasonable behavior there
which is what IIRC the patch did, but even without that, for a given dict,
d.values() != d.values().

So, it's not like comparison is currently unimplemented. It returns
answers, they just mostly make no sense. (And of course I know that what's
happening is we're falling back to an identity check)

On Thu, Mar 28, 2019, 09:51 Inada Naoki <report at bugs.python.org> wrote:

>
> Inada Naoki <songofacandy at gmail.com> added the comment:
>
> > Well, surely there are reasonable semantics :), because dict.values ==
> > dict.values was comparable before we had view objects.
>
> Because it was list.
>
> Now values view is not sequence-like or set-like.
>
> >>> {"a": "foo", "b": "bar"}.values() == {"a": "bar", "b": "foo"}.value()
> True if set-like.  False if sequence-like.
>
> If you want Python 2 behavior, you should convert it to list.
> Then you can use "sequence" semantics.
>
> ----------
>
> _______________________________________
> Python tracker <report at bugs.python.org>
> <https://bugs.python.org/issue12445>
> _______________________________________
>

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<https://bugs.python.org/issue12445>
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