code: def test_one_insert(self):
      sm = difflib.SequenceMatcher(None, "b" * 100, "a" + "b" * 100)
      self.assertAlmostEqual(sm.ratio(), 0.995, places=3)
      self.assertEqual(
          list(sm.get_opcodes()),
          [("insert", 0, 0, 0, 1), ("equal", 0, 100, 1, 101)],
      )
      self.assertEqual(sm.bpopular, set())
      sm = difflib.SequenceMatcher(
          None, "b" * 100, "b" * 50 + "a" + "b" * 50
      )
      self.assertAlmostEqual(sm.ratio(), 0.995, places=3)
      self.assertEqual(
          list(sm.get_opcodes()),
          [
              ("equal", 0, 50, 0, 50),
              ("insert", 50, 50, 50, 51),
              ("equal", 50, 100, 51, 101),
          ],
      )
      self.assertEqual(sm.bpopular, set())
  
imports: import difflib
  from test.support import findfile
  import unittest
  import doctest
  import sys
label_desc: Use image node_id 1 for calling the TestWithAscii obj's underlying member method code with example usage: obj.test_one_insert() without return types