diff --git a/norms/wsocket.py b/norms/wsocket.py
index b339bbe..ad37930 100644
--- a/norms/wsocket.py
+++ b/norms/wsocket.py
@@ -14,5 +14,6 @@ async def main():
     async with serve(echo, "localhost", 8765):
         await asyncio.Future()  # run forever
 
+
 if __name__ == "__main__":
     asyncio.run(main())
diff --git a/src/social_norms_trees/atomic_mutations.py b/src/social_norms_trees/atomic_mutations.py
index 8a9b744..3b014b9 100644
--- a/src/social_norms_trees/atomic_mutations.py
+++ b/src/social_norms_trees/atomic_mutations.py
@@ -190,10 +190,8 @@ def exchange(
                 --> A
     """
 
-    node0_parent, node0_index = node0.parent, node0.parent.children.index(
-        node0)
-    node1_parent, node1_index = node1.parent, node1.parent.children.index(
-        node1)
+    node0_parent, node0_index = node0.parent, node0.parent.children.index(node0)
+    node1_parent, node1_index = node1.parent, node1.parent.children.index(node1)
 
     move(node0, (node1_parent, node1_index))
     move(node1, (node0_parent, node0_index))
@@ -527,7 +525,7 @@ def prompt_identify_composite(
     tree: py_trees.behaviour.Behaviour,
     message: str = "Which composite node?",
     display_nodes: bool = True,
-    skip_label: str = "_"
+    skip_label: str = "_",
 ) -> Tuple[py_trees.composites.Composite, int]:
     """
     Example:
@@ -655,8 +653,7 @@ def format_library_with_indices(library: List[py_trees.behaviour.Behaviour]):
 
 
 # Wrapper functions for the atomic operations which give them a UI.
-MutationResult = namedtuple(
-    "MutationResult", ["result", "tree", "function", "kwargs"])
+MutationResult = namedtuple("MutationResult", ["result", "tree", "function", "kwargs"])
 
 
 def mutate_chooser(*fs: Union[Callable], message="Which action?"):
@@ -723,14 +720,12 @@ def prompt_get_mutate_arguments(annotation: GenericAlias, tree, library):
         return node
     elif annotation_ == str(CompositeIndex):
         _logger.debug("in CompositeIndex")
-        composite_node = prompt_identify_composite(
-            tree, message="Which parent?")
+        composite_node = prompt_identify_composite(tree, message="Which parent?")
         index = prompt_identify_child_index(composite_node)
         return composite_node, index
     elif annotation_ == str(NewNode):
         _logger.debug("in NewNode")
-        new_node = prompt_identify_library_node(
-            library, "Which node from the library?")
+        new_node = prompt_identify_library_node(library, "Which node from the library?")
         return new_node
     else:
         _logger.debug("in 'else'")
diff --git a/src/social_norms_trees/ui_wrapper.py b/src/social_norms_trees/ui_wrapper.py
index de1f3ba..88c9e88 100644
--- a/src/social_norms_trees/ui_wrapper.py
+++ b/src/social_norms_trees/ui_wrapper.py
@@ -45,8 +45,7 @@ def experiment_setup(db, origin_tree):
     print("\n")
     participant_id = participant_login()
 
-    experiment_id = initialize_experiment_record(
-        db, participant_id, origin_tree)
+    experiment_id = initialize_experiment_record(db, participant_id, origin_tree)
 
     print("\nSetup Complete.\n")
 
@@ -61,8 +60,7 @@ def participant_login():
 
 def load_resources(file_path):
     try:
-        print(
-            f"\nLoading behavior tree and behavior library from {file_path}...\n")
+        print(f"\nLoading behavior tree and behavior library from {file_path}...\n")
         with open(file_path, "r") as file:
             resources = json.load(file)
 
@@ -137,8 +135,7 @@ def run_experiment(db, origin_tree, experiment_id, behavior_library):
                     db[experiment_id]["action_history"].append(action_log)
 
                 elif action == 4:
-                    origin_tree, action_log = add_node(
-                        origin_tree, behavior_library)
+                    origin_tree, action_log = add_node(origin_tree, behavior_library)
                     db[experiment_id]["action_history"].append(action_log)
 
                 else:
@@ -167,9 +164,16 @@ def run_experiment(db, origin_tree, experiment_id, behavior_library):
 
 @app.command()
 def main(
-    resources_file: Annotated[pathlib.Path, typer.Argument(help="file with the experimental context, behavior tree, and behavior library")],
-    db_file: Annotated[pathlib.Path, typer.Option(
-        help="file where the experimental results will be written")] = "db.json",
+    resources_file: Annotated[
+        pathlib.Path,
+        typer.Argument(
+            help="file with the experimental context, behavior tree, and behavior library"
+        ),
+    ],
+    db_file: Annotated[
+        pathlib.Path,
+        typer.Option(help="file where the experimental results will be written"),
+    ] = "db.json",
 ):
     print("AIT Prototype #1 Simulator")
 
@@ -179,8 +183,7 @@ def main(
 
     # load tree to run experiment on, and behavior library
 
-    original_tree, behavior_library, context_paragraph = load_resources(
-        resources_file)
+    original_tree, behavior_library, context_paragraph = load_resources(resources_file)
     print(f"\nContext of this experiment: {context_paragraph}")
 
     participant_id, experiment_id = experiment_setup(db, original_tree)