code: def create_reader(self, **read_args):
      return RandomBytesReader(
          read_args["num_batches_per_task"],
          read_args["row_size"],
          num_rows_per_batch=read_args.get("num_rows_per_batch", None),
          use_bytes=read_args.get("use_bytes", True),
          use_arrow=read_args.get("use_arrow", False),
      )
  
imports: import os
  import time
  from dataclasses import astuple, dataclass
  import numpy
  import pandas
  import pyarrow
  import pytest
  import ray
  from ray.data import Dataset
  from ray.data._internal.arrow_block import ArrowBlockAccessor
  from ray.data._internal.lazy_block_list import LazyBlockList
  from ray.data.block import BlockMetadata
  from ray.data.datasource import Datasource
  from ray.data.datasource.csv_datasource import CSVDatasource
  from ray.data.datasource.datasource import Reader, ReadTask
  from ray.data.tests.conftest import CoreExecutionMetrics, assert_blocks_expected_in_plasma, assert_core_execution_metrics_equals, get_initial_core_execution_metrics_snapshot
  from ray.tests.conftest import *
label_desc: Use image node_id 1 for calling the RandomBytesDatasource obj's underlying member method code with example usage: obj.create_reader() and returns: RandomBytesReader