diff --git a/projects/self_notes/toy_story/constants.py b/projects/self_notes/toy_story/constants.py
index 20afe6a..e31c559 100644
--- a/projects/self_notes/toy_story/constants.py
+++ b/projects/self_notes/toy_story/constants.py
@@ -5,7 +5,6 @@
 LICENSE file in the root directory of this source tree.
 """
 
-
 from typing import List, Type
 
 from relation import IsAtEdge, IsWithEdge, HasEdge, IsInsideEdge, create_rules
diff --git a/projects/self_notes/toy_story/graph.py b/projects/self_notes/toy_story/graph.py
index 970e128..3ab9db4 100644
--- a/projects/self_notes/toy_story/graph.py
+++ b/projects/self_notes/toy_story/graph.py
@@ -5,7 +5,6 @@
 LICENSE file in the root directory of this source tree.
 """
 
-
 from typing import Any, Dict, List, Type, Union
 
 
diff --git a/projects/self_notes/toy_story/main.py b/projects/self_notes/toy_story/main.py
index b86479c..f1ef618 100644
--- a/projects/self_notes/toy_story/main.py
+++ b/projects/self_notes/toy_story/main.py
@@ -5,7 +5,6 @@
 LICENSE file in the root directory of this source tree.
 """
 
-
 import json
 import random
 import argparse
diff --git a/projects/self_notes/toy_story/relation.py b/projects/self_notes/toy_story/relation.py
index 2c64031..596ce5b 100644
--- a/projects/self_notes/toy_story/relation.py
+++ b/projects/self_notes/toy_story/relation.py
@@ -5,7 +5,6 @@
 LICENSE file in the root directory of this source tree.
 """
 
-
 from typing import List, Tuple
 
 from rules import (
diff --git a/projects/self_notes/toy_story/rules.py b/projects/self_notes/toy_story/rules.py
index e5a9f84..66a16df 100644
--- a/projects/self_notes/toy_story/rules.py
+++ b/projects/self_notes/toy_story/rules.py
@@ -5,7 +5,6 @@
 LICENSE file in the root directory of this source tree.
 """
 
-
 from typing import Optional, Type
 
 from graph import Edge, Graph
diff --git a/projects/self_notes/toy_story/world.py b/projects/self_notes/toy_story/world.py
index 5918276..6724265 100644
--- a/projects/self_notes/toy_story/world.py
+++ b/projects/self_notes/toy_story/world.py
@@ -5,7 +5,6 @@
 LICENSE file in the root directory of this source tree.
 """
 
-
 import logging
 import random
 import numpy as np