title: Can't find my PYTHONPATH
body: <p>I'm trying to change my PYTHONPATH. I've tried to change it in "My Computer" etc, but it doesn't exist there. I searched in the registry in some places, and even ran a whole search for the word 'PYTHONPATH', but to no avail.</p>
  
  <p>However, it Python I can easily see it exists. So where is it?</p>