code: def walk_error(msg):
      "Handle os.walk error."
      print(msg)
  
file_path: cpython/Lib/idlelib/grep.py
imports: import fnmatch
  import os
  import sys
  from tkinter import StringVar, BooleanVar
  from tkinter.ttk import Checkbutton
  from idlelib.searchbase import SearchDialogBase
  from idlelib import searchengine
label_desc: Use image node_id 2 for calling a global function with example usage: walk_error(msg) without return types