code: def test_wrappers(self):
      self.o.ind = 4
      self.n.ind = 5
      self.assertEqual((6).__index__(), 6)
      self.assertEqual(-(7).__index__(), -7)
      self.assertEqual(self.o.__index__(), 4)
      self.assertEqual(self.n.__index__(), 5)
      self.assertEqual(True.__index__(), 1)
      self.assertEqual(False.__index__(), 0)
  
imports: import unittest
  from test import support
  import operator
label_desc: Use image node_id 4 for calling the BaseTestCase obj's underlying member method code with example usage: obj.test_wrappers() without return types