diff --git a/python/example/single_cell_cable.py b/python/example/single_cell_cable.py
index e1ee854bf..02da84643 100755
--- a/python/example/single_cell_cable.py
+++ b/python/example/single_cell_cable.py
@@ -10,7 +10,8 @@
 
 
 class Cable(A.recipe):
-    def __init__(self,
+    def __init__(
+        self,
         probes,
         Vm,
         length,
@@ -21,7 +22,8 @@ def __init__(self,
         stimulus_start,
         stimulus_duration,
         stimulus_amplitude,
-        cv_policy_max_extent):
+        cv_policy_max_extent,
+    ):
         """
         probes -- list of probes
 
diff --git a/python/example/single_cell_detailed_recipe.py b/python/example/single_cell_detailed_recipe.py
index d76316627..b45f2076c 100644
--- a/python/example/single_cell_detailed_recipe.py
+++ b/python/example/single_cell_detailed_recipe.py
@@ -75,6 +75,7 @@
 # (4) Create the cell
 cell = A.cable_cell(lmrf.morphology, decor, labels, cvp)
 
+
 # (5) Create a class that inherits from A.recipe
 class single_recipe(A.recipe):
     # (5.1) Define the class constructor