title: What's the difference between tf.Session() and tf.InteractiveSession()?
body: <p>In which cases should <code>tf.Session()</code> and <code>tf.InteractiveSession()</code> be considered for what purpose?</p>
  
  <p>When I tried to use the former one, some functions (for example, <code>.eval()</code>) didn't work, and when I changed to the later one, it worked.</p>