title: tensorflow Variable Initialization error : Attempting to use uninitialized value Variable
body: <p>Why is this happening?
  <a href="https://i.stack.imgur.com/0rcrd.jpg" rel="nofollow noreferrer">Error message - Attempting to uninitialized Variable Error</a>
  here is my source:
  <a href="https://i.stack.imgur.com/kxh4c.jpg" rel="nofollow noreferrer">source - Learning .JPG Image in computer using tensorflow</a></p>
  
  <p>I don't know why this error occur...
  I already used two types of variable initialization function:</p>
  
  <ol>
  <li><code>tf.global_variables_initializer()</code></li>
  <li><code>tf.local_variables_initializer()</code></li>
  </ol>