Do not execute a statement without catching the return value in global namespace

The issue is that any statement without a variable to catch the
returned value will cause that value to be stored in the _ variable
and when that happens in the global namespace, it will cause issues
such as the gettext _ variable being overwritten

3 files changed, 6 insertions, 5 deletions

diff --git a/Cura/gui/printWindow.py b/Cura/gui/printWindow.py
index fe5f48930e..b21b79e149 100644
--- a/Cura/gui/printWindow.py
+++ b/Cura/gui/printWindow.py
@@ -37,8 +37,8 @@ elif sys.platform.startswith('darwin'):
 	frameworkIdentifier="com.apple.iokit",
 	frameworkPath=objc.pathForFramework("/System/Library/Frameworks/IOKit.framework"),
 	globals=globals())
-	objc.loadBundleFunctions(bundle, globals(), [("IOPMAssertionCreateWithName", b"i@I@o^I")])
-	objc.loadBundleFunctions(bundle, globals(), [("IOPMAssertionRelease", b"iI")])
+	foo = objc.loadBundleFunctions(bundle, globals(), [("IOPMAssertionCreateWithName", b"i@I@o^I")])
+	foo = objc.loadBundleFunctions(bundle, globals(), [("IOPMAssertionRelease", b"iI")])
 	def preventComputerFromSleeping(frame, prevent):
 		if prevent:
 			success, preventComputerFromSleeping.assertionID = IOPMAssertionCreateWithName(kIOPMAssertionTypeNoDisplaySleep, kIOPMAssertionLevelOn, "Cura is printing", None)
diff --git a/Cura/gui/util/openglHelpers.py b/Cura/gui/util/openglHelpers.py
index 0c1e9cb6ce..3880c3644f 100644
--- a/Cura/gui/util/openglHelpers.py
+++ b/Cura/gui/util/openglHelpers.py
@@ -14,7 +14,8 @@ from OpenGL.GLUT import *
 from OpenGL.GLU import *
 from OpenGL.GL import *
 from OpenGL.GL import shaders
-glutInit() #Hack; required before glut can be called. Not required for all OS.
+
+foo = glutInit() #Hack; required before glut can be called. Not required for all OS.
 
 class GLReferenceCounter(object):
 	def __init__(self):
diff --git a/Cura/gui/util/taskbar.py b/Cura/gui/util/taskbar.py
index e78fc0f229..a59f73dd87 100644
--- a/Cura/gui/util/taskbar.py
+++ b/Cura/gui/util/taskbar.py
@@ -5,11 +5,11 @@ __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AG
 
 try:
 	import comtypes.client as cc
-	cc.GetModule('taskbarlib.tlb')
+	foo = cc.GetModule('taskbarlib.tlb')
 	import comtypes.gen.TaskbarLib as tbl
 
 	ITaskbarList3 = cc.CreateObject("{56FDF344-FD6D-11d0-958A-006097C9A090}", interface=tbl.ITaskbarList3)
-	ITaskbarList3.HrInit()
+	foo = ITaskbarList3.HrInit()
 
 	#Stops displaying progress and returns the button to its normal state. Call this method with this flag to dismiss the progress bar when the operation is complete or canceled.
 	TBPF_NOPROGRESS = 0x00000000