code: def badport():
      if MPI.get_vendor()[0] != "MPICH":
          return False
      try:
          port = MPI.Open_port()
          MPI.Close_port(port)
      except:
          port = ""
      return port == ""
  
file_path: mpi4py/test/test_dynproc.py
imports: from mpi4py import MPI
  import mpiunittest
label_desc: Use image node_id 4 for calling a global function with example usage: badport() and returns: unknown, False