code: def _asyncio_open_serial_unix(path):
      
  
      try:
          # wait for VM to create the pipe file.
          yield from wait_for_file_creation(path)
      except asyncio.TimeoutError:
          raise NodeError('Pipe file "{}" is missing'.format(path))
  
      output = SerialReaderWriterProtocol()
      try:
          yield from asyncio.get_event_loop().create_unix_connection(lambda: output, path)
      except ConnectionRefusedError:
          raise NodeError('Can\'t open pipe file "{}"'.format(path))
      return output
docs: Open a unix socket or a windows named pipe
  
      :returns: An IO like object