code: def dev_null_wrapper(func, *a, **kwargs):
      
      os.dup2(dev_null, sys.stdout.fileno())
      return_object = func(*a, **kwargs)
      sys.stdout.flush()
      os.dup2(tmp_stdout, sys.stdout.fileno())
      return return_object
docs: Temporarily swap stdout with /dev/null, and execute given function while stdout goes to /dev/null.
      This is useful because netsnmp writes to stdout and disturbes Icinga result in some cases.