diff --git a/city_model_structure/attributes/polyhedron.py b/city_model_structure/attributes/polyhedron.py
index 6e07ecd2..7af0a38f 100644
--- a/city_model_structure/attributes/polyhedron.py
+++ b/city_model_structure/attributes/polyhedron.py
@@ -31,7 +31,6 @@ class Polyhedron:
     self._min_y = None
     self._min_x = None
     self._geometry = GeometryHelper(delta=5.0, area_delta=0.01)
-    print(f'[{self._geometry._area_delta} {self._geometry._delta}]')
 
   def _position_of(self, point, face):
     vertices = self.vertices
diff --git a/factories/usage_feeders/ca_usage_parameters.py b/factories/usage_feeders/ca_usage_parameters.py
index 496e1b83..9b1a5e40 100644
--- a/factories/usage_feeders/ca_usage_parameters.py
+++ b/factories/usage_feeders/ca_usage_parameters.py
@@ -6,6 +6,7 @@ Copyright © 2020 Project Author Pilar Monsalvete pilar_monsalvete@yahoo.es
 from factories.usage_feeders.hft_usage_interface import HftUsageInterface
 from city_model_structure.attributes.usage_zone import UsageZone
 
+
 class CaUsageParameters(HftUsageInterface):
   """
   CaUsageParameters class