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Nov 14, 2023
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gh-111622: Fix doc for items views #112051

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13 changes: 8 additions & 5 deletions Doc/library/stdtypes.rst
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Expand Up @@ -4755,14 +4755,17 @@ support membership tests:

.. versionadded:: 3.10

Keys views are set-like since their entries are unique and :term:`hashable`. If all
values are hashable, so that ``(key, value)`` pairs are unique and hashable,
then the items view is also set-like. (Values views are not treated as set-like
Keys views are set-like since their entries are unique and :term:`hashable`.
Items views also have set-like operations since the (key, value) pairs
are unique and the keys are hashable.
If all values in an items view are hashable as well,
then the items view can interoperate with other sets.
(Values views are not treated as set-like
since the entries are generally not unique.) For set-like views, all of the
operations defined for the abstract base class :class:`collections.abc.Set` are
available (for example, ``==``, ``<``, or ``^``). While using set operators,
set-like views accept any iterable as the other operand, unlike sets which only
accept sets as the input.
set-like views accept any iterable as the other operand,
unlike sets which only accept sets as the input.

An example of dictionary view usage::

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