old_contents: from ....pdio import read_files as rf
  from .._accessors import __all__ as to_test
  from unittest as ut
  
  class Test_Accessors(ut.TestCase):
      def test_area(self):
          raise
      def test_bbox(self):
          raise
      def test_bounding_box(self):
          raise
      def test_centroid(self):
          raise
      def test_holes(self):
          raise
      def test_len(self):
          raise
      def test_parts(self):
          raise
      def test_perimeter(self):
          raise
      def test_segments(self):
          raise
      def test_vertices(self):
          raise
  
new_contents: from ....pdio import read_files as rf
  from .._accessors import __all__ as to_test
  import unittest as ut
  
  class Test_Accessors(ut.TestCase):
      def test_area(self):
          raise
      def test_bbox(self):
          raise
      def test_bounding_box(self):
          raise
      def test_centroid(self):
          raise
      def test_holes(self):
          raise
      def test_len(self):
          raise
      def test_parts(self):
          raise
      def test_perimeter(self):
          raise
      def test_segments(self):
          raise
      def test_vertices(self):
          raise
  
subject: fix unittest import in accessors