code: def testGetAttr(self):
      base = self.WIN.Get_attr(MPI.WIN_BASE)
      size = self.WIN.Get_attr(MPI.WIN_SIZE)
      self.assertEqual(base, 0)
      self.assertEqual(size, 0)
  
imports: from mpi4py import MPI
  import mpiunittest
  import sys
label_desc: Use image node_id 3 for calling the BaseTestWinCreateDynamic obj's underlying member method code with example usage: obj.testGetAttr() without return types