[3.12] gh-108731: Add description of __slots__ to MemberDescriptorType docs (GH-10874...

(cherry picked from commit 6888cccac0776d965cc38a7240e1bdbacb952b91)

Co-authored-by: plokmijnuhby <39633434+plokmijnuhby@users.noreply.github.com>

diff --git a/Doc/library/types.rst b/Doc/library/types.rst
index 3ce7ede4dec3a58c775b601925c578f9c88404ec..f9e0ba4567bef7552fccb879c94815e6613b473d 100644 (file)
--- a/Doc/library/types.rst
+++ b/Doc/library/types.rst
@@ -396,6 +396,10 @@ Standard names are defined for the following types:
    data members which use standard conversion functions; it has the same purpose
    as the :class:`property` type, but for classes defined in extension modules.
 
+   In addition, when a class is defined with a :attr:`~object.__slots__` attribute, then for
+   each slot, an instance of :class:`!MemberDescriptorType` will be added as an attribute
+   on the class. This allows the slot to appear in the class's :attr:`~object.__dict__`.
+
    .. impl-detail::
 
       In other implementations of Python, this type may be identical to