title: How to print the trained parameters of a classifier in TensorFlow
body: <p>I trained a model in TensorFlow, and saved it on disk.
  Now I want to load it from checkpoint and print the trained parameters.
  Something like:</p>
  
  <pre><code>classifier = tf.estimator.DNNClassifier(
      feature_columns=feature_columns,
      hidden_units=hidden_units,
      warm_start_from=checkpoint_path)
  
  print(parameters(classifier))
  </code></pre>
  
  <p>How do I do that?
  I'm using tf version 1.14.</p>