code: def testBoolEqNe(self):
      for dtype in datatypes:
          self.assertTrue(not not dtype)
          eq = dtype == MPI.Datatype(dtype)
          ne = dtype != MPI.Datatype(dtype)
          self.assertTrue(eq)
          self.assertFalse(ne)
  
imports: from mpi4py import MPI
  import mpiunittest
  import struct
label_desc: Use image node_id 1 for calling the TestDatatype obj's underlying member method code with example usage: obj.testBoolEqNe() without return types