title: Do I have to input a tensor into tf.nn.softmax?
body: <p>Why I can put a list into <code>tf.nn.softmax()</code>?</p>
  
  <p>I checked the tensorflow guide. It shows that only non-empty tensor can be accepted for <code>tf.nn.softmax()</code>. Thanks.</p>
  
  <pre><code>customized_softplus = keras.layers.Lambda (lambda x : tf.nn.softplus(x))
  print(customized_softplus([-10.,-5.,0.,5.,10.]))
  </code></pre>
  
  <p>Output:</p>
  
  <pre><code>tf.Tensor([4.5417706e-05 6.7153489e-03 6.9314718e-01 5.0067153e+00 1.0000046e+01], shape=(5,), dtype=float32)
  </code></pre>