code: def initialize(self, argv=None):
      # don't hook up crash handler before parsing command-line
      self.parse_command_line(argv)
      self.init_crash_handler()
      if self.subapp is not None:
          # stop here if subapp is taking over
          return
      # save a copy of CLI config to re-load after config files
      # so that it has highest priority
      cl_config = deepcopy(self.config)
      self.init_profile_dir()
      self.init_config_files()
      self.load_config_file()
      # enforce cl-opts override configfile opts:
      self.update_config(cl_config)
  
imports: import atexit
  from copy import deepcopy
  import glob
  import logging
  import os
  import shutil
  import sys
  from traitlets.config.application import Application, catch_config_error
  from traitlets.config.loader import ConfigFileNotFound, PyFileConfigLoader
  from IPython.core import release, crashhandler
  from IPython.core.profiledir import ProfileDir, ProfileDirError
  from IPython.paths import get_ipython_dir, get_ipython_package_dir
  from IPython.utils.path import ensure_dir_exists
  from IPython.utils import py3compat
  from traitlets import List, Unicode, Type, Bool, Dict, Set, Instance, Undefined, default, observe
label_desc: Use image node_id 18 for calling the BaseIPythonApplication obj's underlying member method code with example usage: obj.initialize(argv) without return types