code: def testMemory(self):
      memory = self.WIN.tomemory()
      self.assertEqual(memory.format, "B")
      pointer = MPI.Get_address(memory)
      length = len(memory)
      base, size, dunit = self.WIN.attrs
      self.assertEqual(size, length)
      self.assertEqual(dunit, 1)
      self.assertEqual(base, pointer)
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 2 for calling the BaseTestWin obj's underlying member method code with example usage: obj.testMemory() without return types