title: What does tf.gfile do in TensorFlow?
body: <p>I've seen people using several functions from <code>tf.gfile</code> such as <code>tf.gfile.GFile</code> or <code>tf.gfile.Exists</code>. I have the idea that <code>tf.gfile</code> deals with files. However, I haven't been able to find the official documentation to see what else it offers. </p>
  
  <p>It'd be great if you could help me with it.</p>