diff --git a/code/utils/scene_slicer.py b/code/utils/scene_slicer.py
index 9df8ad3..523aae5 100644
--- a/code/utils/scene_slicer.py
+++ b/code/utils/scene_slicer.py
@@ -15,8 +15,13 @@
 # for i in range(8):
 #     path_to_images.append("../../" + data_paths['bold_dico_7Tad2grpbold7Tad']['sub1']['runs'][0]['path'])
 
+
 class SceneSlicer:
-    def __init__(self, path_to_images, path_to_scene_csv="../../ds113_study_description/stimulus/task001/annotations/scenes.csv"):
+    def __init__(
+            self,
+            path_to_images,
+            path_to_scene_csv="../../ds113_study_description/stimulus/task001/annotations/scenes.csv"
+    ):
         self.path_to_images = path_to_images
         self.path_to_scene_csv = path_to_scene_csv
         self.images = [0] * len(path_to_images)
@@ -26,11 +31,14 @@ def __init__(self, path_to_images, path_to_scene_csv="../../ds113_study_descript
         self.scene_keys = []
 
     def generate_scene_desc_dict(self):
-        with open(self.path_to_scene_csv, 'rb') as csvfile:
-            reader = csv.DictReader(csvfile, fieldnames=['seconds', 'scene', 'day-night', 'int-ext'])
+        with open(self.path_to_scene_csv, 'rt') as csvfile:
+            reader = csv.DictReader(
+                csvfile,
+                fieldnames=['seconds', 'scene', 'day-night', 'int-ext'])
             for row in reader:
                 scene_time = int(float(row['seconds']))
-                self.scene_desc[scene_time] = (row['day-night'] == "DAY", row['int-ext'] == "INT")
+                self.scene_desc[scene_time] = (row['day-night'] == "DAY",
+                                               row['int-ext'] == "INT")
         self.scene_keys = self.scene_desc.keys()
         self.scene_keys.sort()
 
@@ -62,12 +70,16 @@ def get_scene_slices(self, run_num):
                     key_index = i
                     break
             for i in range(img.shape[3]):
-                if key_index + 1 < len(self.scene_keys) and (i * 2) + scene_start >= self.scene_keys[key_index + 1]:
+                if key_index + 1 < len(self.scene_keys) and (
+                        i * 2) + scene_start >= self.scene_keys[key_index + 1]:
                     key_index += 1
                 curr_time = self.scene_keys[key_index]
-                day_slices.append(i) if self.scene_desc[curr_time][IS_DAY] else night_slices.append(i)
-                int_slices.append(i) if self.scene_desc[curr_time][IS_INT] else ext_slices.append(i)
-            self.scene_slices[run_num] = (day_slices, night_slices, int_slices, ext_slices)
+                day_slices.append(i) if self.scene_desc[curr_time][
+                    IS_DAY] else night_slices.append(i)
+                int_slices.append(i) if self.scene_desc[curr_time][
+                    IS_INT] else ext_slices.append(i)
+            self.scene_slices[run_num] = (day_slices, night_slices, int_slices,
+                                          ext_slices)
         return self.scene_slices[run_num]
 
     def get_day_night(self, run_num, slice):
@@ -77,4 +89,3 @@ def get_day_night(self, run_num, slice):
         is_day_slice = slice in scene_slices[DAY_IND]
         is_int_slice = slice in scene_slices[INT_IND]
         return (is_day_slice, is_int_slice)
-
diff --git a/code/utils/tests/test_scene_slicer.py b/code/utils/tests/test_scene_slicer.py
index 202bf04..c37eb2f 100644
--- a/code/utils/tests/test_scene_slicer.py
+++ b/code/utils/tests/test_scene_slicer.py
@@ -12,8 +12,8 @@
 
 
 def test_prepare():
-    data = np.array([[[[7, 9], [7, 8]], [[1, 2], [1, 8]]],
-                     [[[2, 3], [2, 1]], [[5, 4], [4, 3]]]])
+    data = np.array([[[[7, 9], [7, 8]], [[1, 2], [1, 8]]], [[[2, 3], [2, 1]],
+                                                            [[5, 4], [4, 3]]]])
     img = nib.Nifti1Image(data, affine=np.diag([1, 1, 1, 1]))
     nib.save(img, 'test_data.nii')
     with open('scene.csv', 'w') as csvfile:
@@ -36,6 +36,7 @@ def test_scene_slicer_init():
     assert ss.segment_duration == [902, 882, 876, 976, 924, 878, 1086, 673.4]
     delete_files()
 
+
 def test_scene_slicer_dict():
     ss = test_prepare()
     ss.generate_scene_desc_dict()
@@ -45,21 +46,23 @@ def test_scene_slicer_dict():
         assert ss.scene_desc[i][IS_INT] == 0 or ss.scene_desc[i][IS_INT] == 1
     delete_files()
 
+
 def test_scene_slicer_image():
     ss = test_prepare()
     ss.get_image(0)
     assert ss.images[0] != 0
     delete_files()
 
+
 def test_scene_slicer_slices():
     ss = test_prepare()
     ss.get_scene_slices(0)
     assert ss.scene_slices[0] != 0
     delete_files()
 
+
 def test_scene_slicer_day_night():
     ss = test_prepare()
     scene_tup = ss.get_day_night(0, 0)
     assert scene_tup == (True, False)
     delete_files()
-