Doc: link to PyObject_GetOptionalAttr()

Author: vstinner

Doc/c-api/object.rst

@@ -167,6 +167,9 @@ Object Protocol
 
    .. versionadded:: 3.13
 
+   .. seealso::
+      The :c:func:`PyType_Lookup` function.
+
 
 .. c:function:: int PyObject_GetOptionalAttrString(PyObject *obj, const char *attr_name, PyObject **result);
 

Doc/c-api/type.rst

@@ -320,6 +320,9 @@ Type Objects
 
    .. versionadded:: next
 
+   .. seealso::
+      The :c:func:`PyObject_GetOptionalAttr` function.
+
 
 .. c:function:: int PyUnstable_Type_AssignVersionTag(PyTypeObject *type)