diff --git a/python/dune/perftool/pdelab/argument.py b/python/dune/perftool/pdelab/argument.py
index ff6ff6e9602a87a3ef28153772b64b8853c53893..b537093bb5def70a32acd99f42f8caba5d03b11e 100644
--- a/python/dune/perftool/pdelab/argument.py
+++ b/python/dune/perftool/pdelab/argument.py
@@ -102,7 +102,7 @@ def name_trialfunction_gradient(element, restriction, component):
     # This is just a temporary test used to create an A-matrix as
     # local operator class member. Right now it doesn't evaluate
     # anything.
-    if get_option("sumfact") and restriction==Restriction.NONE:
+    if get_option("sumfact") and restriction == Restriction.NONE:
         from dune.perftool.sumfact import evaluate_coefficient_gradient_sumfact
         evaluate_coefficient_gradient_sumfact(element, name, container, restriction, component)
 
diff --git a/python/dune/perftool/sumfact/amatrix.py b/python/dune/perftool/sumfact/amatrix.py
index 4703180aae29ece8fc9bf8339e6a40c5b0a174e9..6b4d911474f25009e94c12655c92df9be1570256 100644
--- a/python/dune/perftool/sumfact/amatrix.py
+++ b/python/dune/perftool/sumfact/amatrix.py
@@ -17,6 +17,7 @@ from dune.perftool.pdelab.localoperator import (name_domain_field,
 
 from dune.perftool.sumfact.sumfact import AMatrix, sumfact
 
+
 @class_member("operator")
 def define_alignment(name):
     alignment = get_option("sumfact_alignment")
diff --git a/python/dune/perftool/sumfact/sumfact.py b/python/dune/perftool/sumfact/sumfact.py
index 5884b2f010330dd16ac8f764a236002740eecb16..9bbd6e0222139238f7f6fb034caf7af7de2d6943 100644
--- a/python/dune/perftool/sumfact/sumfact.py
+++ b/python/dune/perftool/sumfact/sumfact.py
@@ -75,10 +75,11 @@ class _GlobalSumfactCounter(object):
 def _sumfact_rows_iname(a_matrix, count):
     # TODO: Avoid caching?
     # count = _GlobalSumfactCounter().get()
-    name = "sf_cols_"+str(count)
+    name = "sf_cols_" + str(count)
     domain(name, a_matrix.m)
     return name
 
+
 def sumfact_rows_iname(a_matrix):
     count = _GlobalSumfactCounter().get()
     name = _sumfact_rows_iname(a_matrix, count)
@@ -89,7 +90,7 @@ def sumfact_rows_iname(a_matrix):
 def _sumfact_collumns_iname(input_collumns, count):
     # TODO: Avoid caching?
     # count = _GlobalSumfactCounter().get()
-    name = "sf_rows_"+str(count)
+    name = "sf_rows_" + str(count)
     domain(name, int(input_collumns))
     return name
 
@@ -179,19 +180,19 @@ def sumfact(element, name, container, restriction, component, a_matrices, inp, o
     # Special case for 1D
     if len(a_matrices) == 1:
         input_collumns = sumfact_kernel(a_matrices[0], inp, out, input_collumns,
-                                    first=True, element=element, name=name, container=container,
-                                    restriction=restriction, component=component)
+                                        first=True, element=element, name=name, container=container,
+                                        restriction=restriction, component=component)
     else:
         # Create buffer
         buffer_1 = name_buffer(a_matrices)
         if len(a_matrices) > 2:
             buffer_2 = name_buffer(a_matrices)
 
-        if len(a_matrices)%2 == 0:
+        if len(a_matrices) % 2 == 0:
             # First kernel
             input_collumns = sumfact_kernel(a_matrices[0], inp, out, input_collumns,
-                                        first=True, element=element, name=name, container=container,
-                                        restriction=restriction, component=component)
+                                            first=True, element=element, name=name, container=container,
+                                            restriction=restriction, component=component)
 
             # In between kernels
             for mat_1, mat_2 in zip(a_matrices[1:-2:2], a_matrices[2:-1:2]):
@@ -203,8 +204,8 @@ def sumfact(element, name, container, restriction, component, a_matrices, inp, o
         else:
             # First kernel
             input_collumns = sumfact_kernel(a_matrices[0], inp, out, input_collumns,
-                                        first=True, element=element, name=name, container=container,
-                                        restriction=restriction, component=component)
+                                            first=True, element=element, name=name, container=container,
+                                            restriction=restriction, component=component)
 
             # Second kernel
             input_collumns = sumfact_kernel(a_matrices[1], buffer_1, buffer_2, input_collumns)