code: def transfer(self, data):
          
          settings = self.transfer_settings
          settings.spi_tx_size = len(data)
          self.transfer_settings = settings
  
          response = ''
          for i in range(0, len(data), 60):
              response += self.sendCommand(commands.SPITransferCommand(data[i:i + 60])).data
              time.sleep(0.01)
  
          while len(response) < len(data):
              response += self.sendCommand(commands.SPITransferCommand('')).data
  
          return ''.join(response)
docs: Transfers data over SPI.
  
          Arguments:
              data: The data to transfer.
  
          Returns:
              The data returned by the SPI device.