code: def _download(url, filename):
      """Download a url to a file in the JAX data temp directory."""
      if not path.exists(_DATA):
          os.makedirs(_DATA)
      out_file = path.join(_DATA, filename)
      if not path.isfile(out_file):
          urllib.request.urlretrieve(url, out_file)
          print(f"downloaded {url} to {_DATA}")
  
file_path: PySyft/notebooks/tutorials/model-training/mnist_dataset.py
imports: import array
  import gzip
  import os
  from os import path
  import struct
  import urllib.request
  import numpy
label_desc: Use image node_id 1 for calling a global function with example usage: _download(url, filename) without return types