diff --git a/src/dynamic_graph/attrpath.py b/src/dynamic_graph/attrpath.py
index 1e5cdfa82d0f3e1c113d8f38a25a381a952e6eb0..98d059ececbba8154dc116727ba6a8c510247ba6 100644
--- a/src/dynamic_graph/attrpath.py
+++ b/src/dynamic_graph/attrpath.py
@@ -30,7 +30,9 @@ class CommandPath(object):
 
 
 def createCommandModule(target, name):
+
     def createGetter(name):
+
         def __(self):
             obj = getattr(self, name)
             obj.mother = self
diff --git a/src/dynamic_graph/script_shortcuts.py b/src/dynamic_graph/script_shortcuts.py
index afca81fb06d1204c6e8dbece489bb97120e6090a..04a1bb71d77d14ab7d1acf5c7b63c4988852f3de 100644
--- a/src/dynamic_graph/script_shortcuts.py
+++ b/src/dynamic_graph/script_shortcuts.py
@@ -107,7 +107,9 @@ sys.ps1 = '% '
 
 # Enable function that can be call without()def optionalparentheses(f):
 def optionalparentheses(f):
+
     class decoclass:
+
         def __init__(self, f):
             self.functor = f
 
diff --git a/tests/test_bindings.py b/tests/test_bindings.py
index 92ea4a5ad415ea8b3f05edcc2ea5f09ee5fa89bb..d4d8a3680c08d159557ee0bb06f56ce337256916 100644
--- a/tests/test_bindings.py
+++ b/tests/test_bindings.py
@@ -10,6 +10,7 @@ did not match C++ signature:
 
 
 class BindingsTests(unittest.TestCase):
+
     def test_type_check(self):
         """
         test the type checking in signal plugs