code: def read_whole_file(f):
      """read whole contents at once"""
      f.seek(0)
      while f.read():
          pass
  
imports: import itertools
  import os
  import platform
  import re
  import sys
  import time
  from optparse import OptionParser
label_desc: Use image node_id 10 for calling a global function with example usage: read_whole_file(f) without return types