From 33f0e8cb6559cd17721883473f112a507ae1a136 Mon Sep 17 00:00:00 2001
From: Lipu Fei <lipu.fei815@gmail.com>
Date: Tue, 9 Jan 2018 13:58:04 +0100
Subject: [PATCH] Use isinstance() to check if a node is a SceneNode

CURA-4780
---
 cura/OneAtATimeIterator.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cura/OneAtATimeIterator.py b/cura/OneAtATimeIterator.py
index 755680e62f..5653c8f1fb 100644
--- a/cura/OneAtATimeIterator.py
+++ b/cura/OneAtATimeIterator.py
@@ -18,7 +18,7 @@ class OneAtATimeIterator(Iterator.Iterator):
     def _fillStack(self):
         node_list = []
         for node in self._scene_node.getChildren():
-            if not issubclass(type(node), SceneNode):
+            if not isinstance(node, SceneNode):
                 continue
 
             if node.callDecoration("getConvexHull"):