anchor.diff:              end,
               receive
                   {PythonPort, {exit_status, _Status}} ->
  -                    port_close(PythonPort),
  +                    _ = (catch port_close(PythonPort)),
                       ok
               end;
           {PythonPort, {data, {eol, Line}}} ->
  
positive.code: 
  -spec close_fifo(string(), port()) -> ok.
  close_fifo(FifoName, FifoPort) ->
      port_close(FifoPort),
      _ = file:delete(FifoName),
      ok.
  
  
negative.code:                             metrics_pipe_name   = MetricsPipeName, 
                              python_port         = PythonPort
                          }) ->
      _ = (catch port_command(PythonPort, "quit()\n")),
      _ = (catch wait_python_stop(PythonPort)),
      close_fifo(MetricsPipeName, MetricsPipe).
  
  -spec wait_python_stop(port()) -> ok.
  