code: def unknown_arg(s):
      print("")
      print("ERROR: Unknown argument: " + s)
      print("")
      usage()
  
imports: import sys
  import os
  import re
  from random import random
  from random import randrange
  from random import uniform
label_desc: Use image node_id 2 for calling a global function with example usage: unknown_arg(s) without return types