code: def test_large():
      create_and_validate(600, 1024, False)
  
file_path: ffcv/tests/test_memory_reader.py
imports: import numpy
  from tqdm import tqdm
  from assertpy import assert_that
  from torch.utils.data import Dataset
  import logging
  from time import time
  import os
  from assertpy import assert_that
  from tempfile import NamedTemporaryFile
  from ffcv.writer import DatasetWriter
  from ffcv.reader import Reader
  from ffcv.fields import BytesField, IntField
  from ffcv.pipeline.compiler import Compiler
  from ffcv.memory_managers import OSCacheManager
  from test_memory_allocation import DummyDataset
label_desc: Use image node_id 3 for calling a global function with example usage: test_large() without return types