code: def download_mnist_libsvm(mnist_data_dir):
      mnist_data_path = os.path.join(mnist_data_dir, "mnist.bz2")
      data_url = "https://www.csie.ntu.edu.tw/~cjlin/libsvmtools/datasets/multiclass/mnist.bz2"
      r = requests.get(data_url)
      with open(mnist_data_path, "wb") as f:
          f.write(r.content)
  
imports: import os
  import tempfile
  import requests
label_desc: Use image node_id 1 for calling a global function with example usage: download_mnist_libsvm(mnist_data_dir) without return types