diff --git a/sahi/utils/shapely.py b/sahi/utils/shapely.py
index 6a9007fa..61083f87 100644
--- a/sahi/utils/shapely.py
+++ b/sahi/utils/shapely.py
@@ -20,9 +20,6 @@ def get_shapely_box(x: int, y: int, width: int, height: int) -> Polygon:
     return shapely_box
 
 
-
-
-
 def get_shapely_multipolygon(coco_segmentation: List[List]) -> MultiPolygon:
     """
     Accepts coco style polygon coords and converts it to valid shapely multipolygon object
@@ -32,7 +29,7 @@ def filter_polygons(geometry):
         """
         Filters out and returns only Polygon or MultiPolygon components of a geometry.
         If geometry is a Polygon, it converts it into a MultiPolygon.
-        If it's a GeometryCollection, it filters 
+        If it's a GeometryCollection, it filters
         to create a MultiPolygon from any Polygons in the collection.
         Returns an empty MultiPolygon if no Polygon or MultiPolygon components are found.
         """
@@ -100,7 +97,9 @@ def from_coco_bbox(cls, bbox: List[int], slice_bbox: List[int] = None):
         slice_bbox (List[int]): [x_min, y_min, x_max, y_max] Is used
             to calculate sliced coco coordinates.
         """
-        shapely_polygon = get_shapely_box(x=bbox[0], y=bbox[1], width=bbox[2], height=bbox[3])
+        shapely_polygon = get_shapely_box(
+            x=bbox[0], y=bbox[1], width=bbox[2], height=bbox[3]
+        )
         shapely_multipolygon = MultiPolygon([shapely_polygon])
         return cls(multipolygon=shapely_multipolygon, slice_bbox=slice_bbox)
 
@@ -184,7 +183,9 @@ def to_coco_segmentation(self):
             if coco_polygon[:2] == coco_polygon[-2:]:
                 del coco_polygon[-2:]
             # append coco_polygon to coco_segmentation
-            coco_polygon = [point for point in coco_polygon] if coco_polygon else coco_polygon
+            coco_polygon = (
+                [point for point in coco_polygon] if coco_polygon else coco_polygon
+            )
             coco_segmentation.append(coco_polygon)
         return coco_segmentation
 
@@ -207,7 +208,10 @@ def to_opencv_contours(self):
                     miny = self.slice_bbox[1]
                     x_coords = [x_coord - minx for x_coord in x_coords]
                     y_coords = [y_coord - miny for y_coord in y_coords]
-                opencv_contour = [[[int(x_coords[ind]), int(y_coords[ind])]] for ind in range(len(x_coords))]
+                opencv_contour = [
+                    [[int(x_coords[ind]), int(y_coords[ind])]]
+                    for ind in range(len(x_coords))
+                ]
             else:
                 opencv_contour: List = []
             # append opencv_contour to opencv_contours
@@ -321,6 +325,8 @@ def get_intersection(self, polygon: Polygon):
         else:
             intersection_multipolygon = MultiPolygon([])
         # create shapely annotation from intersection multipolygon
-        intersection_shapely_annotation = ShapelyAnnotation(intersection_multipolygon, slice_bbox)
+        intersection_shapely_annotation = ShapelyAnnotation(
+            intersection_multipolygon, slice_bbox
+        )
 
         return intersection_shapely_annotation
diff --git a/tests/test_shapelyutils.py b/tests/test_shapelyutils.py
index 72627119..11ab53f9 100644
--- a/tests/test_shapelyutils.py
+++ b/tests/test_shapelyutils.py
@@ -3,12 +3,7 @@
 
 import unittest
 
-from sahi.utils.shapely import (
-    MultiPolygon,
-    ShapelyAnnotation,
-    get_shapely_box,
-    get_shapely_multipolygon,
-)
+from sahi.utils.shapely import MultiPolygon, ShapelyAnnotation, get_shapely_box, get_shapely_multipolygon
 
 
 class TestShapelyUtils(unittest.TestCase):