title: How to get summary information on tensorflow RNN
body: <p>I implemented a simple RNN using tensorflow, shown below:</p>
  
  <pre><code>cell = tf.contrib.rnn.BasicRNNCell(state_size)
  cell = tf.contrib.rnn.DropoutWrapper(cell, output_keep_prob=keep_prob)
  
  rnn_outputs, final_state = tf.nn.dynamic_rnn(cell, batch_size, dypte=tf.float32)
  </code></pre>
  
  <p>This works fine. But I'd like to log the weight variables to summary writer. Is there any way to do this?</p>
  
  <p>By the way, do we use <code>tf.nn.rnn_cell.BasicRNNCell</code> or <code>tf.contrib.rnn.BasicRNNCell</code>? Or are they identical?</p>