pep8

python/dune/perftool/pdelab/driver.py

@@ -1188,6 +1188,7 @@ def compare_dofs():
             "if (maxerror>{})".format(get_option("compare_dofs")),
             "  throw;"]
 
+
 @symbol
 def type_discrete_grid_function(gfs):
     return "DGF_{}".format(gfs.upper())

python/dune/perftool/ufl/execution.py

@@ -107,12 +107,12 @@ class Expression(Coefficient):
     def __mul__(self, other):
         # Allow the combination of Expressions
         if isinstance(other, Expression):
-            from ufl import MixedElement, TensorElement
             def get_sub(elem):
                 if isinstance(elem, MixedElement) and not isinstance(elem, (VectorElement, TensorElement)):
                     return elem.sub_elements()
                 else:
                     return [elem]
+
             newelem = MixedElement(*(get_sub(self.element) + get_sub(other.element)))
             return Expression(cppcode=self.c_expr + other.c_expr, element=newelem)
         else: