code: def delete_multi(self, keys):
          
          logger.debug('Deleting keys %r', keys)
          if six.PY2:
              msg = ''
          else:
              msg = b''
          for key in keys:
              msg += struct.pack(
                  self.HEADER_STRUCT +
                  self.COMMANDS['delete']['struct'] % len(key),
                  self.MAGIC['request'],
                  self.COMMANDS['delete']['command'],
                  len(key), 0, 0, 0, len(key), 0, 0, str_to_bytes(key))
  
          msg += struct.pack(
              self.HEADER_STRUCT +
              self.COMMANDS['noop']['struct'],
              self.MAGIC['request'],
              self.COMMANDS['noop']['command'],
              0, 0, 0, 0, 0, 0, 0)
  
          self._send(msg)
  
          opcode = -1
          retval = True
          while opcode != self.COMMANDS['noop']['command']:
              (magic, opcode, keylen, extlen, datatype, status, bodylen, opaque,
               cas, extra_content) = self._get_response()
              if status != self.STATUS['success']:
                  retval = False
              if status == self.STATUS['server_disconnected']:
                  break
  
          return retval
docs: Delete multiple keys from server in one command.
  
          :param keys: A list of keys to be deleted
          :type keys: list
          :return: True in case of success and False in case of failure.
          :rtype: bool