title: How does "import __hello__" work?
body: <p>Recently I've come across this "Hello world" Python program:</p>
  
  <pre><code>&gt;&gt;&gt; import __hello__
  Hello world!
  </code></pre>
  
  <p>I wonder how it works and how to view the source code of the  <code>__hello__</code> module.</p>