diff --git a/metadrive/component/lane/pg_lane.py b/metadrive/component/lane/pg_lane.py
index 26cfda222..3f2df7d84 100644
--- a/metadrive/component/lane/pg_lane.py
+++ b/metadrive/component/lane/pg_lane.py
@@ -73,8 +73,10 @@ def construct_sidewalk(self, block):
         start_lat = +self.width_at(0) / 2 + 0.2
         side_lat = start_lat + PGDrivableAreaProperty.SIDEWALK_WIDTH
         if self.radius != 0 and side_lat > self.radius:
-            raise ValueError("The sidewalk width ({}) is too large."
-                             " It should be < radius ({})".format(side_lat, self.radius))
+            raise ValueError(
+                "The sidewalk width ({}) is too large."
+                " It should be < radius ({})".format(side_lat, self.radius)
+            )
         for k, lateral in enumerate([start_lat, side_lat]):
             if k == 1:
                 longs = longs[::-1]
diff --git a/metadrive/utils/utils.py b/metadrive/utils/utils.py
index f9c5e25c9..72f90470a 100644
--- a/metadrive/utils/utils.py
+++ b/metadrive/utils/utils.py
@@ -119,12 +119,12 @@ def merge_dicts(old_dict, new_dict, allow_new_keys=False, without_copy=False):
 
 
 def _deep_update(
-        original,
-        new_dict,
-        new_keys_allowed=False,
-        allow_new_subkey_list=None,
-        override_all_if_type_changes=None,
-        raise_error=True
+    original,
+    new_dict,
+    new_keys_allowed=False,
+    allow_new_subkey_list=None,
+    override_all_if_type_changes=None,
+    raise_error=True
 ):
     allow_new_subkey_list = allow_new_subkey_list or []
     override_all_if_type_changes = override_all_if_type_changes or []
@@ -222,7 +222,6 @@ def time_me(fn):
     Returns: None
 
     """
-
     def _wrapper(*args, **kwargs):
         start = time.time()
         ret = fn(*args, **kwargs)
@@ -309,8 +308,7 @@ def draw_polygon(polygon):
 
     # Plot the rectangle
     plt.figure(figsize=(8, 8))
-    plt.plot(*zip(*np.append(rectangle_points, [rectangle_points[0]], axis=0)), marker='o',
-             label='Rectangle Vertices')
+    plt.plot(*zip(*np.append(rectangle_points, [rectangle_points[0]], axis=0)), marker='o', label='Rectangle Vertices')
     plt.fill(
         *zip(*np.append(rectangle_points, [rectangle_points[0]], axis=0)), alpha=0.3
     )  # Fill the rectangle with light opacity