fix sphinx warning
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
index 252ef02..67a4f06c 100644
--- a/Doc/library/functions.rst
+++ b/Doc/library/functions.rst
@@ -664,6 +664,7 @@
 
 
 .. function:: memoryview(obj)
+   :noindex:
 
    Return a "memory view" object created from the given argument.  See
    :ref:`typememoryview` for more information.