code: def testAttributes(self):
      base, size, unit = self.WIN.attrs
      self.assertEqual(base, MPI.Get_address(self.memory))
      self.assertEqual(size, len(self.memory))
      self.assertEqual(unit, 1)
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 3 for calling the BaseTestWin obj's underlying member method code with example usage: obj.testAttributes() without return types