code: def default_download_dir(name):
      r"""Return the directory to which packages will be downloaded by default."""
      global _default_texar_download_dir  # pylint: disable=global-statement
      if _default_texar_download_dir is None:
          if sys.platform == "win32" and "APPDATA" in os.environ:
              # On Windows, use %APPDATA%
              home_dir = Path(os.environ["APPDATA"])
          else:
              # Otherwise, install in the user's home directory.
              home_dir = Path(os.environ["HOME"])
  
          if os.access(str(home_dir), os.W_OK):
              _default_texar_download_dir = home_dir / "texar_data"
          else:
              raise ValueError(
                  "The path {} is not writable. Please manually "
                  "specify the download directory".format(home_dir)
              )
  
      if not _default_texar_download_dir.exists():
          _default_texar_download_dir.mkdir(parents=True)
  
      return _default_texar_download_dir / name
  
imports: import os
  import sys
  from abc import ABCMeta, abstractmethod
  from pathlib import Path
  from texar.tf.data.data_utils import maybe_download
  from texar.tf.hyperparams import HParams
  from texar.tf.module_base import ModuleBase
label_desc: Use image node_id 1 for calling a global function with example usage: default_download_dir(name) and returns: unknown