From e3e470cb960db2318a27800cdcad2d9366645873 Mon Sep 17 00:00:00 2001
From: Lipu Fei <lipu.fei815@gmail.com>
Date: Sat, 3 Mar 2018 14:48:08 +0100
Subject: [PATCH] Simplify set update

---
 cura/Machines/QualityGroup.py | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/cura/Machines/QualityGroup.py b/cura/Machines/QualityGroup.py
index 6067f04038..6945162401 100644
--- a/cura/Machines/QualityGroup.py
+++ b/cura/Machines/QualityGroup.py
@@ -38,8 +38,7 @@ class QualityGroup(QObject):
         for node in [self.node_for_global] + list(self.nodes_for_extruders.values()):
             if node is None:
                 continue
-            for key in node.getContainer().getAllKeys():
-                result.add(key)
+            result.update(node.getContainer().getAllKeys())
         return result
 
     def getAllNodes(self) -> List["QualityGroup"]: