code: def read_small_chunks(f):
      """read 20 units at a time"""
      f.seek(0)
      while f.read(20):
          pass
  
imports: import itertools
  import os
  import platform
  import re
  import sys
  import time
  from optparse import OptionParser
label_desc: Use image node_id 8 for calling a global function with example usage: read_small_chunks(f) without return types