From 394c99e8d7ba1ef6a87bdab24004cea2c016855b Mon Sep 17 00:00:00 2001
From: BruceSherwood <bruce.sherwood@gmail.com>
Date: Sun, 27 Feb 2022 13:37:58 -0800
Subject: [PATCH] Fix scene.camera.follow(None)

---
 vpython/vpython.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/vpython/vpython.py b/vpython/vpython.py
index 71e6a10..1cb1d5c 100644
--- a/vpython/vpython.py
+++ b/vpython/vpython.py
@@ -2934,7 +2934,10 @@ def __init__(self, **args):
         baseObj._canvas_constructing = False
 
     def follow(self, obj):    ## should allow a function also
-        self.addmethod('follow', obj.idx)
+        if obj is None:
+            self.addmethod('follow', 'None')
+        else:
+            self.addmethod('follow', obj.idx)
 
     def select(self):
         canvas.selected = self