title: Save specific weights in TensorFlow
body: <p>In my neural network, I create some <code>tf.Variable</code> objects as follows:</p>
  
  <pre><code>weights = {
      'wc1_0': tf.Variable(tf.random_normal([5, 5, 3, 64])),
      'wc1_1': tf.Variable(tf.random_normal([5, 5, 3, 64]))
  }
  biases = {
      'bc1_0': tf.Variable(tf.constant(0.0, shape=[64])),
      'bc1_1': tf.Variable(tf.constant(0.0, shape=[64]))
  }
  </code></pre>
  
  <p>How would I save the variables in <code>weights</code> and <code>biases</code> after a  specific number of iterations without saving  other variables?</p>