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@@ -4959,6 +4959,11 @@ All parameterized generics implement special read-only attributes.
(~T,)
+ .. note::
+ A ``GenericAlias`` object with :class:`typing.ParamSpec` parameters may not
+ have correct ``__parameters__`` after substitution because
+ :class:`typing.ParamSpec` is intended primarily for static type checking.
+
.. seealso::
* :pep:`585` -- "Type Hinting Generics In Standard Collections"