LGTM: various fixes for using string operator instead of numeric

src/Mod/PartDesign/Scripts/DistanceBolt.py

@@ -56,10 +56,9 @@ class DistanceBolt:
 
 def makeDistanceBolt():
 	doc = FreeCAD.activeDocument()
-	if doc == None:
+	if doc is None:
 		doc = FreeCAD.newDocument()
 	bolt=doc.addObject("Part::FeaturePython","Distance_Bolt")
 	bolt.Label = "Distance bolt"
 	DistanceBolt(bolt)
 	bolt.ViewObject.Proxy=0
-

src/Mod/PartDesign/Scripts/Epitrochoid.py

@@ -57,7 +57,7 @@ class Epitrochoid:
 
 def makeEpitrochoid():
     doc = FreeCAD.activeDocument()
-    if doc == None:
+    if doc is None:
         doc = FreeCAD.newDocument()
     epitrochoid=doc.addObject("Part::FeaturePython","Epitrochoid") #add object to document
     epitrochoid.Label = "Epitrochoid"

src/Mod/PartDesign/Scripts/Gear.py

@@ -17,8 +17,8 @@ def proceed():
 
 def compute():    
     QtGui.QApplication.setOverrideCursor(QtCore.Qt.WaitCursor)
-   
-    if FreeCAD.ActiveDocument==None:
+
+    if FreeCAD.ActiveDocument is None:
         FreeCAD.newDocument("Gear")
 
     oldDocumentObjects=App.ActiveDocument.Objects

src/Mod/PartDesign/Scripts/Parallelepiped.py

@@ -64,7 +64,7 @@ class BoxCylinder:
 
 def makeParallelepiped():
 	doc = FreeCAD.activeDocument()
-	if doc == None:
+	if doc is None:
 		doc = FreeCAD.newDocument()
 	obj=doc.addObject("Part::FeaturePython","Parallelepiped")
 	obj.Label = "Parallelepiped"
@@ -74,7 +74,7 @@ def makeParallelepiped():
 
 def makeBoxCylinder():
 	doc = FreeCAD.activeDocument()
-	if doc == None:
+	if doc is None:
 		doc = FreeCAD.newDocument()
 	cyl=doc.addObject("Part::Cylinder","Cylinder")
 	cyl.Radius=16.0

src/Mod/PartDesign/Scripts/Spring.py

@@ -39,7 +39,7 @@ class MySpring:
 
 def makeMySpring():
    doc = FreeCAD.activeDocument()
-   if doc == None:
+   if doc is None:
       doc = FreeCAD.newDocument()
    spring=doc.addObject("Part::FeaturePython","My_Spring")
    spring.Label = "My Spring"