code: def _read32(bytestream):
      dt = np.dtype(np.uint32).newbyteorder(">")
      return np.frombuffer(bytestream.read(4), dtype=dt)[0]
  
imports: from pyspark import SparkContext
  from pyspark.sql import SparkSession
  from zoo import init_nncontext
  from zoo.orca.data import SparkXShards
  from zoo.orca.data.file import open_text, write_text
  from zoo.orca.data.image.utils import chunks, dict_to_row, row_to_dict, encode_schema, decode_schema, SchemaField, FeatureType, DType, ndarray_dtype_to_dtype, decode_feature_type_ndarray, pa_fs
  from zoo.orca.data.image.voc_dataset import VOCDatasets
  from bigdl.util.common import get_node_and_core_number
  import os
  import numpy
  import random
  import pyarrow.parquet
  import io
  import math
label_desc: Use image node_id 1 for calling a global function with example usage: _read32(bytestream) and returns: np