code: def testWTimeIsGlobal(self):
      wtg = MPI.COMM_WORLD.Get_attr(MPI.WTIME_IS_GLOBAL)
      if wtg is not None:
          self.assertIn(wtg, (True, False))
  
imports: from mpi4py import MPI
  import mpiunittest
  import os
label_desc: Use image node_id 1 for calling the TestWorldAttrs obj's underlying member method code with example usage: obj.testWTimeIsGlobal() without return types