class_docstr: A BlockList that submits tasks lazily on-demand.
  
  This BlockList is used for implementing read operations (e.g., to avoid
  needing to read all files of a Dataset when the user is just wanting to
  .take() the first few rows or view the schema).
class_docstr_tok: ["A","BlockList","that","submits","tasks","lazily","on-demand",".","This","BlockList","is","used","for","implementing","read","operations","(","e.g.",",","to","avoid","needing","to","read","all","files","of","a","Dataset","when","the","user","is","just","wanting","to",".take","(",")","the","first","few","rows","or","view","the","schema",")","."]
code: def split(self, split_size: int) -> List["LazyBlockList"]:
      num_splits = math.ceil(len(self._tasks) / split_size)
      tasks = _split_list(self._tasks, num_splits)
      block_partition_refs = _split_list(
          self._block_partition_refs, num_splits
      )
      block_partition_meta_refs = _split_list(
          self._block_partition_meta_refs, num_splits
      )
      cached_metadata = _split_list(self._cached_metadata, num_splits)
      output = []
      for t, b, m, c in zip(
          tasks,
          block_partition_refs,
          block_partition_meta_refs,
          cached_metadata,
      ):
          output.append(
              LazyBlockList(
                  t,
                  b,
                  m,
                  c,
                  owned_by_consumer=self._owned_by_consumer,
              )
          )
      return output
  
imports: import math
  import uuid
  from typing import Any, Dict, Iterable, Iterator, List, Optional, Tuple, Union
  import ray
  from ray.data._internal.block_list import BlockList
  from ray.data._internal.memory_tracing import trace_allocation
  from ray.data._internal.progress_bar import ProgressBar
  from ray.data._internal.remote_fn import cached_remote_fn
  from ray.data._internal.stats import DatasetStats, _get_or_create_stats_actor
  from ray.data._internal.util import _split_list
  from ray.data.block import Block, BlockAccessor, BlockExecStats, BlockMetadata, BlockPartitionMetadata, MaybeBlockPartition
  from ray.data.context import DataContext
  from ray.data.datasource import ReadTask
  from ray.types import ObjectRef
label_desc: Use image node_id 9 for calling the LazyBlockList obj's underlying member method code with example usage: obj.split(split_size) and returns: output