diff --git a/pagexml/helper/file_helper.py b/pagexml/helper/file_helper.py
index ca03a62..71a194f 100644
--- a/pagexml/helper/file_helper.py
+++ b/pagexml/helper/file_helper.py
@@ -1,4 +1,3 @@
-import glob
 import os
 import tarfile
 import zipfile
diff --git a/pagexml/helper/pagexml_helper.py b/pagexml/helper/pagexml_helper.py
index 1bbeee7..64e5a13 100644
--- a/pagexml/helper/pagexml_helper.py
+++ b/pagexml/helper/pagexml_helper.py
@@ -350,7 +350,7 @@ def read_line_format_file(line_format_files: Union[str, List[str]],
                 else:
                     if len(row) > len(headers):
                         raise IndexError(
-                            f"Missing columns. Header has {len(headers)} columns while line {li+1} in row "
+                            f"Missing columns. Header has {len(headers)} columns while line {li + 1} in row "
                             f"has {len(row)} columns")
                     yield {header: row[hi] if len(row) > hi else None for hi, header in enumerate(headers)}
 
@@ -380,19 +380,20 @@ def get_custom_tags(doc: pdm.PageXMLDoc) -> List[Dict[str, any]]:
                 offset = tag_el["offset"]
                 length = tag_el["length"]
 
-                value = line.text[offset:offset+length]
+                value = line.text[offset:offset + length]
 
                 custom_tags.append({
-                    "type": tag, 
-                    "value": value, 
-                    "region_id": region.id, 
-                    "line_id": line.id,                     
-                    "offset": offset, 
+                    "type": tag,
+                    "value": value,
+                    "region_id": region.id,
+                    "line_id": line.id,
+                    "offset": offset,
                     "length": length,
                 })
 
     return custom_tags
 
+
 class LineIterable:
 
     def __init__(self, line_format_files: Union[str, List[str]], headers: List[str] = None):
@@ -532,5 +533,3 @@ def merge_lines(lines: List[pdm.PageXMLTextLine], remove_word_break: bool = Fals
         text += curr_line.text
     return pdm.PageXMLTextLine(metadata=copy.deepcopy(lines[0].metadata),
                                coords=coords, text=text)
-
-
diff --git a/tests/physical_document_model_test.py b/tests/physical_document_model_test.py
index 3d38d7e..75fb037 100644
--- a/tests/physical_document_model_test.py
+++ b/tests/physical_document_model_test.py
@@ -2,7 +2,6 @@
 from unittest.mock import Mock
 
 import pagexml.model.physical_document_model as pdm
-# from pagexml.model.physical_document_model import pdm.Coords, pdm.StructureDoc, PhysicalStructureDoc, pdm.LogicalStructureDoc
 
 
 class TestCoords(unittest.TestCase):
@@ -52,14 +51,14 @@ def test_list_of_line_point_coords_to_hull_of_coords(self):
 
     def test_valid_points_from_str(self):
         coords = pdm.Coords('1216,1119 1205,1109 1202,1109 1198,1112 1195,1112 1191,1116 1164,1116 1160,1119 1147,1119'
-                        ' 1143,1123 1126,1123 1123,1126 1102,1126 1098,1130 1074,1130 1071,1133 1016,1133 1012,1136'
-                        ' 964,1136 961,1140 957,1140 954,1143 940,1143 937,1147 930,1147 926,1150 916,1150 912,1154'
-                        ' 899,1154 895,1157 888,1157 885,1160 882,1160 878,1164 875,1164 857,1181 847,1181 840,1188'
-                        ' 837,1188 833,1191 830,1191 826,1195 823,1195 820,1198 816,1198 813,1202 809,1202 795,1216'
-                        ' 795,1229 799,1229 802,1233 813,1233 816,1236 875,1236 878,1240 895,1240 899,1243 923,1243'
-                        ' 926,1247 1036,1247 1040,1243 1147,1243 1150,1240 1181,1240 1185,1236 1209,1236 1212,1233'
-                        ' 1216,1233 1219,1229 1219,1226 1222,1222 1222,1216 1219,1212 1219,1209 1216,1205 1216,1150'
-                        ' 1219,1147 1219,1143 1216,1140')
+                            ' 1143,1123 1126,1123 1123,1126 1102,1126 1098,1130 1074,1130 1071,1133 1016,1133 1012,1136'
+                            ' 964,1136 961,1140 957,1140 954,1143 940,1143 937,1147 930,1147 926,1150 916,1150 912,1154'
+                            ' 899,1154 895,1157 888,1157 885,1160 882,1160 878,1164 875,1164 857,1181 847,1181 840,1188'
+                            ' 837,1188 833,1191 830,1191 826,1195 823,1195 820,1198 816,1198 813,1202 809,1202 795,1216'
+                            ' 795,1229 799,1229 802,1233 813,1233 816,1236 875,1236 878,1240 895,1240 899,1243 923,1243'
+                            ' 926,1247 1036,1247 1040,1243 1147,1243 1150,1240 1181,1240 1185,1236 1209,1236 1212,1233'
+                            ' 1216,1233 1219,1229 1219,1226 1222,1222 1222,1216 1219,1212 1219,1209 1216,1205 1216,1150'
+                            ' 1219,1147 1219,1143 1216,1140')
         x = [p[0] for p in coords.points]
         print(min(x), max(x))
         y = [p[1] for p in coords.points]