diff --git a/src/Mod/Material/Material.py b/src/Mod/Material/Material.py
index 3fa98d28d3..8dca1ea6ce 100644
--- a/src/Mod/Material/Material.py
+++ b/src/Mod/Material/Material.py
@@ -94,6 +94,7 @@ def exportFCMat(fileName, matDict):
         configfile.write(Preamble)
         Config.write(configfile)
 
+
 def getMaterialAttributeStructure(withSpaces=None):
 
     ''''''
diff --git a/src/Mod/Material/MaterialEditor.py b/src/Mod/Material/MaterialEditor.py
index 67800a17d0..c6189ceaea 100644
--- a/src/Mod/Material/MaterialEditor.py
+++ b/src/Mod/Material/MaterialEditor.py
@@ -53,9 +53,9 @@ class MaterialEditor:
         self.groups = []
 
         # load the UI file from the same directory as this script
-        self.widget =\
-            FreeCADGui.PySideUic.loadUi(os.path.dirname(__file__) +
-                                        os.sep + "materials-editor.ui")
+        self.widget = FreeCADGui.PySideUic.loadUi(
+            os.path.dirname(__file__) + os.sep + "materials-editor.ui"
+        )
 
         # additional UI fixes and tweaks
         widget = self.widget
@@ -269,21 +269,21 @@ class MaterialEditor:
     def expandKey(self, key):
         "adds spaces before caps in a KeyName"
         nk = ""
-        for l in key:
-            if l.isupper():
+        for ln in key:
+            if ln.isupper():
                 if nk:
                     # this allows for series of caps, such as ProductURL
                     if not nk[-1].isupper():
                         nk += " "
-            nk += l
+            nk += ln
         return nk
 
     def collapseKey(self, key):
         "removes the spaces in a Key Name"
         nk = ""
-        for l in key:
-            if l != " ":
-                nk += l
+        for ln in key:
+            if ln != " ":
+                nk += ln
         return nk
 
     def addCustomProperty(self, key=None, value=None):
@@ -434,7 +434,7 @@ class MaterialEditor:
         it = group.child(item.row(), 1)
         name = it.text()
         if sys.version_info.major < 3:
-            if isinstance(name,unicode):
+            if isinstance(name, unicode):
                 name = name.encode("utf8")
         if not name:
             name = "Material"
@@ -567,8 +567,9 @@ def matProperWidget(parent=None, Type="String", Units=None, Value=None,
         widget = ui.createWidget("Gui::InputField")
         if Units:
             vv = string2tuple(Units)
-            unit = FreeCAD.Units.Unit(vv[0], vv[1], vv[2], vv[3],
-                        vv[4], vv[5], vv[6], vv[7])
+            unit = FreeCAD.Units.Unit(
+                vv[0], vv[1], vv[2], vv[3], vv[4], vv[5], vv[6], vv[7]
+            )
             quantity = FreeCAD.Units.Quantity(1, unit)
             widget.setProperty('unit', quantity.getUserPreferred()[2])
 
diff --git a/src/Mod/Material/importFCMat.py b/src/Mod/Material/importFCMat.py
index 8c42fc4c3f..619263d811 100644
--- a/src/Mod/Material/importFCMat.py
+++ b/src/Mod/Material/importFCMat.py
@@ -35,7 +35,7 @@ __url__ = "http://www.freecadweb.org"
 
 
 # to distinguish python built-in open function from the one declared below
-if open.__module__ in ['__builtin__','io']:
+if open.__module__ in ['__builtin__', 'io']:
     pythonopen = open
 
 
@@ -85,21 +85,21 @@ def read(filename):
         filename = filename.encode(sys.getfilesystemencoding())
     f = pythonopen(filename)
     d = {}
-    l = 0
+    ln = 0
     for line in f:
-        if l == 0:
+        if ln == 0:
             d["CardName"] = line.split(";")[1].strip()
-        elif l == 1:
+        elif ln == 1:
             d["AuthorAndLicense"] = line.split(";")[1].strip()
         else:
             if not line[0] in ";#[":
                 k = line.split("=")
                 if len(k) == 2:
                     v = k[1].strip()
-                    if hasattr(v,"decode"):
+                    if hasattr(v, "decode"):
                         v = v.decode('utf-8')
                     d[k[0].strip()] = v
-        l += 1
+        ln += 1
     return d