code: def open(self, port, baudrate=1000000, timeout=0.05):
          
          self._open(port, baudrate, timeout)
          logger.info("Opening port '%s'", self.port,
                      extra={'port': port,
                             'baudrate': baudrate,
                             'timeout': timeout})
docs: Opens a new serial communication (closes the previous communication if needed).
  
              :raises: :py:exc:`~pypot.dynamixel.io.DxlError` if the port is already used.