code: def generate_default_params():
      """
      Generate default hyper parameters
      """
      return {
          "learning_rate": 0.01,
          "batch_size": 100,
          "hidden_units": 100,
      }
  
file_path: nni/examples/trials/mnist-distributed-tfv1/dist_mnist.py
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import json
  import math
  import os
  import sys
  import tempfile
  import time
  import tensorflow
  from tensorflow.examples.tutorials.mnist import input_data
  import nni
label_desc: Use image node_id 1 for calling a global function with example usage: generate_default_params() and returns: dict