title: In Tensorflow, get the names of all the Tensors in a graph
body: <p>I am creating neural nets with <code>Tensorflow</code> and <code>skflow</code>; for some reason I want to get the values of some inner tensors for a given input, so I am using <code>myClassifier.get_layer_value(input, "tensorName")</code>, <code>myClassifier</code> being a <code>skflow.estimators.TensorFlowEstimator</code>. </p>
  
  <p>However, I find it difficult to find the correct syntax of the tensor name, even knowing its name (and I'm getting confused between operation and tensors), so I'm using tensorboard to plot the graph and look for the name.</p>
  
  <p>Is there a way to enumerate all the tensors in a graph without using tensorboard?</p>