CAM: Engrave - Fix #22380 - duplicates

src/Mod/CAM/Path/Op/Engrave.py

@@ -99,30 +99,31 @@ class ObjectEngrave(PathEngraveBase.ObjectOp):
 
         jobshapes = []
 
-        if len(obj.Base) >= 1:  # user has selected specific subelements
+        if obj.Base:
+            # user has selected specific subelements
             Path.Log.track(len(obj.Base))
-            wires = []
             for base, subs in obj.Base:
                 edges = []
-                basewires = []
+                wires = []
                 for feature in subs:
                     sub = base.Shape.getElement(feature)
-                    if type(sub) == Part.Edge:
+                    if isinstance(sub, Part.Edge):
                         edges.append(sub)
                     elif sub.Wires:
-                        basewires.extend(sub.Wires)
+                        wires.extend(sub.Wires)
                     else:
-                        basewires.append(Part.Wire(sub.Edges))
+                        wires.append(Part.Wire(sub.Edges))
 
-                for edgelist in Part.sortEdges(edges):
-                    basewires.append(Part.Wire(edgelist))
+                for sortedEdges in Part.sortEdges(edges):
+                    wires.append(Part.Wire(sortedEdges))
 
-                wires.extend(basewires)
                 jobshapes.append(Part.makeCompound(wires))
 
-        elif len(obj.BaseShapes) > 0:  # user added specific shapes
+        elif obj.BaseShapes:
+            # user added specific shapes
             jobshapes.extend([base.Shape for base in obj.BaseShapes])
         else:
+            # process all objects in Job.Model.Group
             Path.Log.track(self.model)
             for base in self.model:
                 Path.Log.track(base.Label)