code: def open(self):
          
          if self._is_open:
              raise HIDException("Failed to open device: HIDDevice already open")
  
          path = self.path.encode('utf-8')
          dev = hidapi.hid_open_path(path)
  
          if dev:
              self._is_open = True
              self._device = dev
          else:
              raise HIDException("Failed to open device")
docs: Open the HID device for reading and writing.