code: def read_int(stream):
      length = stream.read(4)
      if not length:
          raise EOFError
      return struct.unpack("!i", length)[0]
  
imports: import pickle
  import struct
  from abc import abstractmethod
  from io import BytesIO
  from itertools import chain
  from typing import TypeVar, Iterable
  from pyflink.common.serializer import TypeSerializer
label_desc: Use image node_id 1 for calling a global function with example usage: read_int(stream) and returns: struct