From b990202f3ad1634e43dbba88ef44da7db32cf640 Mon Sep 17 00:00:00 2001
From: Raymond Hettinger <raymond.hettinger@gmail.com>
Date: Sun, 15 Nov 2020 13:24:10 -0800
Subject: [PATCH] bpo-42360: Add advice to help avoid pickling issues.

---
 Doc/library/collections.rst | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Doc/library/collections.rst b/Doc/library/collections.rst
index f538da5e1c9faa..1293f542b04377 100644
--- a/Doc/library/collections.rst
+++ b/Doc/library/collections.rst
@@ -862,6 +862,9 @@ they add the ability to access fields by name instead of position index.
     Named tuple instances do not have per-instance dictionaries, so they are
     lightweight and require no more memory than regular tuples.
 
+    To support pickling, the named tuple class should be assigned to a variable
+    that matches *typename*.
+
     .. versionchanged:: 3.1
        Added support for *rename*.