code: def test_ensure_relative(self):
      if os.sep == "/":
          self.assertEqual(ensure_relative("/home/foo"), "home/foo")
          self.assertEqual(ensure_relative("some/path"), "some/path")
      else:  # \\
          self.assertEqual(
              ensure_relative("c:\\home\\foo"), "c:home\\foo"
          )
          self.assertEqual(ensure_relative("home\\foo"), "home\\foo")
  
imports: import unittest
  import os
  import stat
  import shutil
  import sys
  from distutils.dir_util import mkpath, remove_tree, create_tree, copy_tree, ensure_relative
  from distutils import log
  from distutils.tests import support
  from test.test_support import run_unittest
label_desc: Use image node_id 9 for calling the DirUtilTestCase obj's underlying member method code with example usage: obj.test_ensure_relative() without return types