code: def main(argv):
      """
      Main program.
  
      @return: none
      """
      global g_script_name
      global g_parse_log_path
  
      g_script_name = os.path.basename(argv[0])
  
      parse_args(argv)
  
      if g_parse_log_path is None:
          print("")
          print("ERROR: -f not specified")
          usage()
  
      d = Dataset(g_parse_log_path)
      d.parse()
  
      d.emit_header()
      for i in range(0, g_num_rows):
          d.emit_one_row()
  
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 5 for calling a global function with example usage: main(argv) without return types