code: def data_dir_default():
      """
  
      :return: default data directory depending on the platform and environment variables
      """
      system = platform.system()
      if system == "Windows":
          return os.path.join(os.environ.get("APPDATA"), "mxnet")
      else:
          return os.path.join(os.path.expanduser("~"), ".mxnet")
  
imports: import re
  import atexit
  import ctypes
  import os
  import sys
  import inspect
  import platform
  import numpy
  from .None import libinfo
label_desc: Use image node_id 1 for calling a global function with example usage: data_dir_default() and returns: os, os