docstr: initialize the profile dir
code: def init_profile_dir(self):
      """initialize the profile dir"""
      self._in_init_profile_dir = True
      if self.profile_dir is not None:
          # already ran
          return
      if "ProfileDir.location" not in self.config:
          # location not specified, find by profile name
          try:
              p = ProfileDir.find_profile_dir_by_name(
                  self.ipython_dir, self.profile, self.config
              )
          except ProfileDirError:
              # not found, maybe create it (always create default profile)
              if self.auto_create or self.profile == "default":
                  try:
                      p = ProfileDir.create_profile_dir_by_name(
                          self.ipython_dir, self.profile, self.config
                      )
                  except ProfileDirError:
                      self.log.fatal(
                          "Could not create profile: %r" % self.profile
                      )
                      self.exit(1)
                  else:
                      self.log.info(
                          "Created profile dir: %r" % p.location
                      )
              else:
                  self.log.fatal("Profile %r not found." % self.profile)
                  self.exit(1)
          else:
              self.log.debug(
                  "Using existing profile dir: %r" % p.location
              )
      else:
          location = self.config.ProfileDir.location
          # location is fully specified
          try:
              p = ProfileDir.find_profile_dir(location, self.config)
          except ProfileDirError:
              # not found, maybe create it
              if self.auto_create:
                  try:
                      p = ProfileDir.create_profile_dir(
                          location, self.config
                      )
                  except ProfileDirError:
                      self.log.fatal(
                          "Could not create profile directory: %r"
                          % location
                      )
                      self.exit(1)
                  else:
                      self.log.debug(
                          "Creating new profile dir: %r" % location
                      )
              else:
                  self.log.fatal(
                      "Profile directory %r not found." % location
                  )
                  self.exit(1)
          else:
              self.log.info("Using existing profile dir: %r" % location)
          # if profile_dir is specified explicitly, set profile name
          dir_name = os.path.basename(p.location)
          if dir_name.startswith("profile_"):
              self.profile = dir_name[8:]
  
      self.profile_dir = p
      self.config_file_paths.append(p.location)
      self._in_init_profile_dir = False
  
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 15 for calling the BaseIPythonApplication obj's underlying member method code with example usage: obj.init_profile_dir() without return types