code: def write_block_data(self, cmd, block):
          
          self.bus.write_i2c_block_data(self.address, cmd, block)
          self.log.debug(
              "write_block_data: Wrote [%s] to command register 0x%02X" % (
                  ', '.join(['0x%02X' % x for x in block]),
                  cmd
              )
          )
docs: Writes a block of bytes to the bus using I2C format to the specified
          command register