code: def get_download_dir():
      """Get the absolute path to the download directory.
  
      Returns
      -------
      dirname : str
          Path to the download directory
      """
      default_dir = os.path.join(os.path.expanduser("~"), ".dgl")
      dirname = os.environ.get("DGL_DOWNLOAD_DIR", default_dir)
      if not os.path.exists(dirname):
          os.makedirs(dirname)
      return dirname
  
imports: from __future__ import absolute_import
  import errno
  import hashlib
  import os
  import pickle
  import sys
  import warnings
  import networkx.algorithms
  import numpy
  import requests
  from tqdm import tqdm
  from ..None import backend
  from .graph_serialize import load_graphs, load_labels, save_graphs
  from .tensor_serialize import load_tensors, save_tensors
label_desc: Use image node_id 7 for calling a global function with example usage: get_download_dir() and returns: dirname