code: def main(argv):
      parser = optparse.OptionParser(add_help_option=False)
      parser.disable_interspersed_args()
  
      parser.add_option(
          "-?",
          "--help",
          dest="help",
          action="store_true",
          default=None,
          help="print help",
      )
      parser.add_option("-t", dest="t", action="store", default=None)
  
      opts, argv_rest = parser.parse_args(argv)
      if getattr(opts, "help", False):
          parser.print_help()
          return 0
  
      tspec = opts.t
      if tspec is None:
          times = None
      else:
          head, sep, tail = tspec.partition(".")
          if 8 > len(head):
              raise Exception(
                  "time spec must follow format [[CC]YY]MMDDhhmm[.SS]: "
                  + tspec
                  + "; "
                  + head
              )
          tfmt = ""
          if 12 == len(head):
              tfmt += "%Y"
          elif 10 == len(head):
              tfmt += "%y"
          tfmt += "%m%d%H%M"
          if 2 == len(tail):
              tfmt += ".%S"
          mtime = time.mktime(time.strptime(tspec, tfmt))
          times = (mtime, mtime)
  
      for file in argv_rest:
          try:
              os.utime(file, times)
          except:
              open(file, "w").close()
              if times is not None:
                  os.utime(file, times)
  
imports: import optparse
  import os
  import sys
  import time
label_desc: Use image node_id 1 for calling a global function with example usage: main(argv) and returns: int