code: def __init__(self, batch=1000, dim=64):
      self.batch = batch
      self.dim = dim
  
file_path: petastorm/petastorm/benchmark/dummy_reader.py
imports: from __future__ import print_function
  from __future__ import division
  import time
  import numpy
  from petastorm.pytorch import BatchedDataLoader, DataLoader
  from collections import namedtuple
  import torch
  from functools import partial
  import sys
label_desc: Use image node_id 1 to create a new DummyReader object from inherited base classes: object with example: obj = DummyReader(batch, dim)