code: def create_partitions(self, topic_partitions, timeout_ms=None, validate_only=False):
          
          version = self._matching_api_version(CreatePartitionsRequest)
          timeout_ms = self._validate_timeout(timeout_ms)
          if version == 0:
              request = CreatePartitionsRequest[version](
                  topic_partitions=[self._convert_create_partitions_request(topic_name, new_partitions) for topic_name, new_partitions in topic_partitions.items()],
                  timeout=timeout_ms,
                  validate_only=validate_only
              )
          else:
              raise NotImplementedError(
                  "Support for CreatePartitions v{} has not yet been added to KafkaAdminClient."
                  .format(version))
          return self._send_request_to_controller(request)
docs: Create additional partitions for an existing topic.
  
          :param topic_partitions: A map of topic name strings to NewPartition objects.
          :param timeout_ms: Milliseconds to wait for new partitions to be
              created before the broker returns.
          :param validate_only: If True, don't actually create new partitions.
              Default: False
          :return: Appropriate version of CreatePartitionsResponse class.