diff --git a/python/dune/perftool/pdelab/driver/gridfunctionspace.py b/python/dune/perftool/pdelab/driver/gridfunctionspace.py
index 2d9b06baba4a4bd45001d98ec3c5e227ce22cc08..e442c08ed9fc7b5f7b12f7505fdbd86287918bd3 100644
--- a/python/dune/perftool/pdelab/driver/gridfunctionspace.py
+++ b/python/dune/perftool/pdelab/driver/gridfunctionspace.py
@@ -29,6 +29,7 @@ def type_domainfield():
     typedef_domainfield("DF")
     return "DF"
 
+
 def basetype_range():
     if get_option('opcounter'):
         from dune.perftool.pdelab.driver.timings import setup_timer
@@ -253,7 +254,7 @@ def define_gfs(element, is_dirichlet, name):
     gv = name_leafview()
     fem = name_fem(element)
     return ["{} {}({}, {});".format(gfstype, name, gv, fem),
-            "{}.name(\"{}\");".format(name, name),]
+            "{}.name(\"{}\");".format(name, name)]
 
 
 @preamble
diff --git a/python/dune/perftool/pdelab/driver/gridoperator.py b/python/dune/perftool/pdelab/driver/gridoperator.py
index 9b8880ad9e162f32bfbd56edc264728e06bd6321..eb6cfd893ddd68c4f987e7dea77c3a501c9c71b6 100644
--- a/python/dune/perftool/pdelab/driver/gridoperator.py
+++ b/python/dune/perftool/pdelab/driver/gridoperator.py
@@ -112,7 +112,7 @@ def define_dofestimate(name):
         geo_factor = 2**get_dimension()
     else:
         if get_dimension() < 3:
-            geo_factor = 3*get_dimension()
+            geo_factor = 3 * get_dimension()
         else:
             # TODO no idea how a generic estimate for 3D simplices looks like
             geo_factor = 12
diff --git a/python/dune/perftool/pdelab/driver/solve.py b/python/dune/perftool/pdelab/driver/solve.py
index 5abbac27c46deb00169f3787b9283c93db9f94a6..59ef32eb39dfa4cd0b49ecbb61a84d30612a0683 100644
--- a/python/dune/perftool/pdelab/driver/solve.py
+++ b/python/dune/perftool/pdelab/driver/solve.py
@@ -101,7 +101,6 @@ def define_vector(name, formdata):
     return ["{} {}({});".format(vtype, name, gfs), "{} = 0.0;".format(name)]
 
 
-
 @preamble
 def typedef_linearsolver(name):
     include_file("dune/pdelab/backend/istl.hh", filetag="driver")
diff --git a/python/dune/perftool/pdelab/driver/timings.py b/python/dune/perftool/pdelab/driver/timings.py
index a2d01fd3df783519fa6abd717b6befdde344c040..d420e61eba8adfcad4188f3cdf9e7441de610ba1 100644
--- a/python/dune/perftool/pdelab/driver/timings.py
+++ b/python/dune/perftool/pdelab/driver/timings.py
@@ -41,6 +41,7 @@ def dump_dof_numbers(stream):
                                                                            ident,
                                                                            name_trial_gfs())
 
+
 @preamble
 def define_timing_stream(name):
     include_file('fstream', filetag='driver', system=True)