code: def efn(x):
      return x.encode(sys.getfilesystemencoding())
  
imports: import os
  import sys
  import ctypes
  import threading
  import logging
  import numpy
  from ..core import get_remote_file, load_lib, Dict, resource_dirs, IS_PYPY, get_platform, InternetNotAllowedError, NeedDownloadError
label_desc: Use image node_id 3 for calling a global function with example usage: efn(x) and returns: x