Feature or enhancement

Proposal:

I am making a class like collections.OrderedDict, and I want to make it fully reversible. When the same class inherits collections.abc.Reversible and collections.abc.Mapping and implements required methods, keys can be iterated in reversed order, but not values and items.

When I try:

reversed(MyMapping)

it works

But

reversed(MyMapping.values())
reversed(MyMapping.items())

raises TypeError: 'ValuesView' object is not reversible and TypeError: 'ItemsView' object is not reversible.

Please make collections.abc.OrderedDict's mixin methods (keys, items, values) reversible when __reversed__ is implemented in the class.

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• GH-134863: Add reversible keys, values, items views to collections.abc builtin library #134877