code: def test_nonreflexive(self):
      # containment and equality tests involving elements that are
      # not necessarily equal to themselves
  
      values = float("nan"), 1, None, "abc", NEVER_EQ
      constructors = list, tuple, dict.fromkeys, set, frozenset, deque
      for constructor in constructors:
          container = constructor(values)
          for elem in container:
              self.assertIn(elem, container)
          self.assertTrue(container == constructor(values))
          self.assertTrue(container == container)
  
file_path: cpython/Lib/test/test_contains.py
imports: from collections import deque
  import unittest
  from test.support import NEVER_EQ
label_desc: Use image node_id 3 for calling the TestContains obj's underlying member method code with example usage: obj.test_nonreflexive() without return types