code: def data_mnist(
      datadir=tempfile.gettempdir(),
      train_start=0,
      train_end=60000,
      test_start=0,
      test_end=10000,
  ):
      warnings.warn(utils_mnist_warning)
      mnist = dataset.MNIST(
          train_start=train_start,
          train_end=train_end,
          test_start=test_start,
          test_end=test_end,
          center=False,
      )
      return mnist.get_set("train") + mnist.get_set("test")
  
file_path: cleverhans/cleverhans_v3.1.0/cleverhans/utils_mnist.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  from __future__ import unicode_literals
  import os
  import tempfile
  import warnings
  from cleverhans import dataset
label_desc: Use image node_id 3 for calling a global function with example usage: data_mnist(datadir, train_start, train_end, test_start, test_end) and returns: unknown