code: def add_parse_callback(callback):
      """Adds a parse callback, to be invoked when option parsing is done.
  
      See `OptionParser.add_parse_callback`
      """
      options.add_parse_callback(callback)
  
imports: from __future__ import absolute_import, division, print_function
  import datetime
  import numbers
  import re
  import sys
  import os
  import textwrap
  from tornado.escape import _unicode, native_str
  from tornado.log import define_logging_options
  from tornado import stack_context
  from tornado.util import basestring_type, exec_in
label_desc: Use image node_id 5 for calling a global function with example usage: add_parse_callback(callback) without return types