diff --git a/python/dune/perftool/generation/cpp.py b/python/dune/perftool/generation/cpp.py
index 9bed7f138e0bf4ae60dd37941c87c2a6d39b5c19..539a5a60d840e6a6a4c99ad73f74514ba793aedb 100644
--- a/python/dune/perftool/generation/cpp.py
+++ b/python/dune/perftool/generation/cpp.py
@@ -48,7 +48,6 @@ def constructor_parameter(_type, name, classtag=None, constructortag=None):
     assert constructortag
     from cgen import Value
 
-
     gen = generator_factory(item_tags=(classtag, constructortag, "constructor_param"), counted=True, no_deco=True)
     return gen(Value(_type, name))
 
diff --git a/python/dune/perftool/generation/loopy.py b/python/dune/perftool/generation/loopy.py
index a42f1f30dad96dc37b793b0058455604dfc106ad..ee43debc921e87f79357f391b832256955ad3960 100644
--- a/python/dune/perftool/generation/loopy.py
+++ b/python/dune/perftool/generation/loopy.py
@@ -50,7 +50,7 @@ def default_declaration(name, shape, shape_impl):
     t = _temporary_type(shape_impl, shape)
     if len(shape_impl) == 0:
         # This is a scalar, just return it!
-        return '{} {}(0.0);'.format(t, name);
+        return '{} {}(0.0);'.format(t, name)
     if shape_impl[0] == 'arr':
         return '{} {}{};'.format(t, name, ''.join('[{}]'.format(s) for s in shape))
     if shape_impl[0] == 'vec':
@@ -66,7 +66,7 @@ def temporary_variable(name, **kwargs):
 
     decl_method = kwargs.pop('decl_method', default_declaration)
     shape = kwargs.get('shape', ())
-    shape_impl = kwargs.pop('shape_impl', ('arr',)*len(shape))
+    shape_impl = kwargs.pop('shape_impl', ('arr',) * len(shape))
 
     decl_method(name, shape, shape_impl)
 
diff --git a/python/dune/perftool/pdelab/geometry.py b/python/dune/perftool/pdelab/geometry.py
index 355a4d6a97e21ba40cdf88ef4ff454f8d7fd7c87..a5e24dd015bf05468c26000724052eff61334967 100644
--- a/python/dune/perftool/pdelab/geometry.py
+++ b/python/dune/perftool/pdelab/geometry.py
@@ -6,6 +6,7 @@ from dune.perftool.pdelab.quadrature import (name_quadrature_position,
                                              quadrature_preamble,
                                              )
 
+
 @preamble
 def define_geometry(name):
     return "auto {} = eg.geometry();".format(name)
@@ -38,8 +39,8 @@ def name_dimension():
 def define_jacobian_inverse_transposed_temporary(name, shape, shape_impl):
     geo = name_geometry()
     return "auto {} = {}.jacobianInverseTransposed({{{{ 0.0 }}}});".format(name,
-                                                                geo,
-                                                                )
+                                                                           geo,
+                                                                           )
 
 
 def define_jacobian_inverse_transposed(name):
@@ -53,6 +54,7 @@ def define_jacobian_inverse_transposed(name):
                                                                                )
                                )
 
+
 @symbol
 def name_jacobian_inverse_transposed():
     define_jacobian_inverse_transposed("J")
diff --git a/python/dune/perftool/pdelab/localoperator.py b/python/dune/perftool/pdelab/localoperator.py
index 4671eba26dc42664b6103d3c5b04784cd74f993a..d3c61f83d5261ce69ce2a29004d51d2bc9e353b2 100644
--- a/python/dune/perftool/pdelab/localoperator.py
+++ b/python/dune/perftool/pdelab/localoperator.py
@@ -80,6 +80,7 @@ def class_type_from_cache(classtag):
 
     return basename, basename + tparam_str
 
+
 @memoize
 def measure_specific_details(measure):
     # The return dictionary that this memoized method will grant direct access to.