title: Python PIL 0.5 opacity, transparency, alpha
body: <p>Is there any way to make an image half transparent?</p>
  
  <p>the pseudo code is something like this:</p>
  
  <pre><code>from PIL import Image
  image = Image.open('image.png')
  image = alpha(image, 0.5)
  </code></pre>
  
  <p>I googled it for a couple of hours but I can't find anything useful. </p>