code: def all_python_files():
      files = []
      for p in TESTED_PACKAGES:
          for dirpath, _, filenames in os.walk(str(ROOT_PATH / p)):
              files += [
                  os.sep.join([dirpath, f])
                  for f in filenames
                  if f.endswith(".py")
              ]
  
      return files
  
file_path: snips-nlu/linting_test.py
imports: from __future__ import unicode_literals
  import os
  import unittest
  from pathlib import Path
  from pylint.lint import Run
label_desc: Use image node_id 1 for calling a global function with example usage: all_python_files() and returns: files