code: def test_one_delete(self):
      sm = difflib.SequenceMatcher(
          None, "a" * 40 + "c" + "b" * 40, "a" * 40 + "b" * 40
      )
      self.assertAlmostEqual(sm.ratio(), 0.994, places=3)
      self.assertEqual(
          list(sm.get_opcodes()),
          [
              ("equal", 0, 40, 0, 40),
              ("delete", 40, 41, 40, 40),
              ("equal", 41, 81, 40, 80),
          ],
      )
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 2 for calling the TestWithAscii obj's underlying member method code with example usage: obj.test_one_delete() without return types