code: def write_block(self, block, data, erase=True):
          
          if block < 0 or block > 255:
              raise ValueError("invalid block number")
          log.debug("write block {0}".format(block))
          cmd = "\x54" if erase is True else "\x1B"
          cmd = cmd + chr(block) + data + self.uid
          rsp = self.transceive(cmd)
          if len(rsp) < 9:
              raise Type1TagCommandError(RESPONSE_ERROR)
          if erase is True and rsp[1:9] != data:
              raise Type1TagCommandError(WRITE_ERROR)
docs: Write an 8-byte data block at address (block * 8). The target
          bytes are zero'd first if *erase* is True.