code: def _fs_mtime_newest(path):
      """
      path:
          If a file, returns mtime of the file. If a directory, returns mtime of
          newest file anywhere within directory tree. Otherwise returns 0.
      """
      ret = 0
      if os.path.isdir(path):
          for dirpath, dirnames, filenames in os.walk(path):
              for filename in filenames:
                  path = os.path.join(dirpath, filename)
                  ret = max(ret, _fs_mtime(path))
      else:
          ret = _fs_mtime(path)
      return ret
  
imports: import base64
  import glob
  import hashlib
  import inspect
  import io
  import os
  import platform
  import re
  import shutil
  import site
  import setuptools
  import subprocess
  import sys
  import sysconfig
  import tarfile
  import textwrap
  import time
  import zipfile
  import wdev
label_desc: Use image node_id 17 for calling a global function with example usage: _fs_mtime_newest(path) and returns: ret