code: def test_graph(self):
      m = TrafficSignsModel()
  
      dot = hl.build_graph(m.graph).build_dot()
      dot.format = "pdf"
      dot.render("tf_traffic_signs", directory=OUTPUT_DIR, cleanup=True)
  
      # Import CIFAR from the demos folder
      sys.path.append("../demos")
      import tf_cifar10
  
      with tf.Session():
          with tf.Graph().as_default() as g:
              tf_cifar10.CIFAR10(data_dir=DATA_DIR).model(
                  inputs=tf.placeholder(
                      tf.float32, shape=(8, 32, 32, 3)
                  )
              )
              dot = hl.build_graph(g).build_dot()
              dot.format = "pdf"
              dot.render(
                  "tf_cifar10", directory=OUTPUT_DIR, cleanup=True
              )
  
file_path: hiddenlayer/tests/test_tf_graph.py
imports: import os
  import sys
  import shutil
  import unittest
  import tensorflow
  import tensorflow.contrib.slim.nets
  from tensorflow.contrib import layers
  import hiddenlayer
label_desc: Use image node_id 1 for calling the TestTensorFlow obj's underlying member method code with example usage: obj.test_graph() without return types