code: def testPutProcNull(self):
      self.WIN.Fence()
      self.WIN.Put(None, MPI.PROC_NULL, None)
      self.WIN.Fence()
  
imports: from mpi4py import MPI
  import mpiunittest
  import contextlib
  import arrayimpl
  import sys
label_desc: Use image node_id 8 for calling the BaseTestRMA obj's underlying member method code with example usage: obj.testPutProcNull() without return types