diff --git a/src/Mod/Arch/ArchAxis.py b/src/Mod/Arch/ArchAxis.py
index e65bf40b68..2101cefc7b 100644
--- a/src/Mod/Arch/ArchAxis.py
+++ b/src/Mod/Arch/ArchAxis.py
@@ -531,8 +531,8 @@ class _ViewProviderAxis:
                                         pts = re.findall("point \[(.*?)\]",buf)[0]
                                         pts = pts.split(",")
                                         pc = []
-                                        for p in pts:
-                                            v = p.strip().split()
+                                        for point in pts:
+                                            v = point.strip().split()
                                             pc.append([float(v[0]),float(v[1]),float(v[2])])
                                         coords = coin.SoCoordinate3()
                                         coords.point.setValues(0,len(pc),pc)
diff --git a/src/Mod/Arch/ArchCommands.py b/src/Mod/Arch/ArchCommands.py
index 876f8d910e..d31b27a5b4 100644
--- a/src/Mod/Arch/ArchCommands.py
+++ b/src/Mod/Arch/ArchCommands.py
@@ -416,7 +416,6 @@ def getCutVolume(cutplane,shapes,clip=False,depth=None):
         bb.add(sh.BoundBox)
     bb.enlarge(1)
     # building cutplane space
-    placement = None
     um = vm = wm = 0
     try:
         if hasattr(cutplane,"Shape"):
@@ -578,9 +577,8 @@ def meshToShape(obj,mark=True,fast=True,tol=0.001,flat=False,cut=True):
 
     name = obj.Name
     if "Mesh" in obj.PropertiesList:
-        faces = []
         mesh = obj.Mesh
-        plac = obj.Placement
+        #plac = obj.Placement
         solid = getShapeFromMesh(mesh,fast,tol,flat,cut)
         if solid:
             if solid.isClosed() and solid.isValid():
@@ -635,7 +633,7 @@ def removeShape(objs,mark=True):
                     v1 = dims[0].multVec(v1)
                     v2 = dims[0].multVec(v2)
                     line = Draft.makeLine(v1,v2)
-                    wal = ArchWall.makeWall(line,width=width,height=dims[3],name=name)
+                    ArchWall.makeWall(line,width=width,height=dims[3],name=name)
         else:
             if mark:
                 obj.ViewObject.ShapeColor = (1.0,0.0,0.0,1.0)
@@ -1336,14 +1334,14 @@ def printMessage( message ):
     if FreeCAD.GuiUp :
         if sys.version_info.major < 3:
             message = message.decode("utf8")
-        reply = QtGui.QMessageBox.information( None , "" , message )
+        QtGui.QMessageBox.information( None , "" , message )
 
 def printWarning( message ):
     FreeCAD.Console.PrintMessage( message )
     if FreeCAD.GuiUp :
         if sys.version_info.major < 3:
             message = message.decode("utf8")
-        reply = QtGui.QMessageBox.warning( None , "" , message )
+        QtGui.QMessageBox.warning( None , "" , message )
 
 
 # command definitions ###############################################
diff --git a/src/Mod/Arch/ArchComponent.py b/src/Mod/Arch/ArchComponent.py
index 69b063a04b..b454feec3e 100644
--- a/src/Mod/Arch/ArchComponent.py
+++ b/src/Mod/Arch/ArchComponent.py
@@ -1060,7 +1060,6 @@ class Component(ArchIFC.IfcProduct):
         if obj.IfcType.endswith("Standard Case"):
             return True
         # Try to guess
-        import ArchIFC
         if obj.IfcType + " Standard Case" in ArchIFC.IfcTypes:
             # this type has a standard case
             if obj.Additions or obj.Subtractions:
diff --git a/src/Mod/Arch/ArchCurtainWall.py b/src/Mod/Arch/ArchCurtainWall.py
index 4696a79483..6f85f31113 100644
--- a/src/Mod/Arch/ArchCurtainWall.py
+++ b/src/Mod/Arch/ArchCurtainWall.py
@@ -602,7 +602,7 @@ class ViewProviderCurtainWall(ArchComponent.ViewProviderComponent):
         colors = []
         nmullions = obj.VerticalMullionNumber + obj.HorizontalMullionNumber + obj.DiagonalMullionNumber
         for i,solid in enumerate(obj.Shape.Solids):
-            for f in solid.Faces:
+            for _ in solid.Faces:
                 if i < nmullions:
                     colors.append(basecolor)
                 else:
diff --git a/src/Mod/Arch/ArchCutPlane.py b/src/Mod/Arch/ArchCutPlane.py
index 00ac07d8d8..fbc804a647 100644
--- a/src/Mod/Arch/ArchCutPlane.py
+++ b/src/Mod/Arch/ArchCutPlane.py
@@ -119,7 +119,7 @@ class _CutPlaneTaskPanel:
         self.linecut=linecut
         self.plan=None
         if linecut:
-            self.plan=plan=getPlanWithLine(FreeCADGui.Selection.getSelectionEx()[1].SubObjects[0])
+            self.plan = getPlanWithLine(FreeCADGui.Selection.getSelectionEx()[1].SubObjects[0])
         else :
             self.plan = FreeCADGui.Selection.getSelectionEx()[1].SubObjects[0]
 
diff --git a/src/Mod/Arch/ArchIFC.py b/src/Mod/Arch/ArchIFC.py
index 3ab5ea20eb..f2c439932f 100644
--- a/src/Mod/Arch/ArchIFC.py
+++ b/src/Mod/Arch/ArchIFC.py
@@ -289,7 +289,6 @@ class IfcRoot:
                             QT_TRANSLATE_NOOP("App::Property", "Description of IFC attributes are not yet implemented"))
             setattr(obj, attribute["name"], attribute["enum_values"])
         else:
-            import ArchIFCSchema
             propertyType = "App::" + ArchIFCSchema.IfcTypes[attribute["type"]]["property"]
             obj.addProperty(propertyType,
                             attribute["name"],
diff --git a/src/Mod/Arch/ArchMaterial.py b/src/Mod/Arch/ArchMaterial.py
index 1b125a2bad..6dbcce39f2 100644
--- a/src/Mod/Arch/ArchMaterial.py
+++ b/src/Mod/Arch/ArchMaterial.py
@@ -21,7 +21,8 @@
 
 import FreeCAD
 if FreeCAD.GuiUp:
-    import FreeCADGui, Arch_rc, os
+    import FreeCADGui, os
+    import Arch_rc # Needed for access to icons # lgtm [py/unused_import]
     from PySide import QtCore, QtGui
     from DraftTools import translate
     from PySide.QtCore import QT_TRANSLATE_NOOP
@@ -537,7 +538,6 @@ class _ArchMaterialTaskPanel:
         except Exception:
             self.form.ButtonCode.hide()
         else:
-            import os
             self.form.ButtonCode.setIcon(QtGui.QIcon(os.path.join(os.path.dirname(BimClassification.__file__),"icons","BIM_Classification.svg")))
         if self.obj:
             if hasattr(self.obj,"Material"):
diff --git a/src/Mod/Arch/ArchNesting.py b/src/Mod/Arch/ArchNesting.py
index 45ca853378..a9eff2a0e7 100644
--- a/src/Mod/Arch/ArchNesting.py
+++ b/src/Mod/Arch/ArchNesting.py
@@ -291,7 +291,6 @@ class Nester:
                     nofitpol = []
                     for placed in sheet:
                         pts = []
-                        pi = 0
                         for placedvert in self.order(placed[1],right=True):
                             fpts = []
                             for i,rotvert in enumerate(rotverts):
diff --git a/src/Mod/Arch/ArchReference.py b/src/Mod/Arch/ArchReference.py
index 861db01306..c62321b8c4 100644
--- a/src/Mod/Arch/ArchReference.py
+++ b/src/Mod/Arch/ArchReference.py
@@ -183,14 +183,14 @@ class ArchReference:
             for edge in shape.Edges:
                 found = False
                 for solid in shape.Solids:
-                    if found:
-                        break
                     for soledge in solid.Edges:
-                        if found:
-                            break
                         if edge.hashCode() == soledge.hashCode():
                             found = True
                             break
+                    if found:
+                        break
+                if found:
+                    break
             else:
                 shapes.append(edge)
             print("solids:",len(shape.Solids),"mattable:",materials)
diff --git a/src/Mod/Arch/ArchSectionPlane.py b/src/Mod/Arch/ArchSectionPlane.py
index 1bdeb66ff3..af649de304 100644
--- a/src/Mod/Arch/ArchSectionPlane.py
+++ b/src/Mod/Arch/ArchSectionPlane.py
@@ -469,8 +469,8 @@ def getSVG(source,
             hshapes = source.Proxy.shapecache[1]
             sshapes = source.Proxy.shapecache[2]
             cutface = source.Proxy.shapecache[3]
-            cutvolume = source.Proxy.shapecache[4]
-            invcutvolume = source.Proxy.shapecache[5]
+            # cutvolume = source.Proxy.shapecache[4] # Unused
+            # invcutvolume = source.Proxy.shapecache[5] # Unused
             objectSshapes = source.Proxy.shapecache[6]
         else:
             if showFill:
@@ -638,10 +638,6 @@ def getDXF(obj):
         return result
     if not allOn:
             objs = Draft.removeHidden(objs)
-    # separate spaces and Draft objects
-    spaces = []
-    nonspaces = []
-    drafts = []
     objs = [o for o in objs if ((not(Draft.getType(o) in ["Space","Dimension","Annotation"])) and (not (o.isDerivedFrom("Part::Part2DObject"))))]
     vshapes,hshapes,sshapes,cutface,cutvolume,invcutvolume = getCutShapes(objs,cutplane,onlySolids,clip,False,showHidden)
     if vshapes:
diff --git a/src/Mod/Arch/ArchSite.py b/src/Mod/Arch/ArchSite.py
index a2eed40cca..da55e26a61 100644
--- a/src/Mod/Arch/ArchSite.py
+++ b/src/Mod/Arch/ArchSite.py
@@ -232,7 +232,7 @@ def makeSolarDiagram(longitude,latitude,scale=1,complete=False,tz=None):
     numsep = coin.SoSeparator()
     pathsep = coin.SoSeparator()
     hoursep = coin.SoSeparator()
-    hournumsep = coin.SoSeparator()
+    #hournumsep = coin.SoSeparator()
     mastersep.addChild(circlesep)
     mastersep.addChild(numsep)
     mastersep.addChild(pathsep)
diff --git a/src/Mod/Arch/ArchStairs.py b/src/Mod/Arch/ArchStairs.py
index 6906fd06de..d247fe9d98 100644
--- a/src/Mod/Arch/ArchStairs.py
+++ b/src/Mod/Arch/ArchStairs.py
@@ -60,7 +60,6 @@ def makeStairs(baseobj=None,length=None,width=None,height=None,steps=None,name="
         return
     p = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/Arch")
 
-    bases = []
     stairs = []
     additions = []