title: Python: I can't import a module even though it's in site-packages
body: <p>I'm following the tutorial "Think Python" and I'm supposed to install the package called swampy. I'm running python 2.7.3 although I also have python 3 installed. I extracted the package and placed it in site-packages:<br>
  C:\Python27\Lib\site-packages\swampy-2.1.1<br>
  C:\Python31\Lib\site-packages\swampy-2.1.1<br>
  But when i try to import a module from it within python:</p>
  
  <pre><code>import swampy.TurtleWorld
  </code></pre>
  
  <p>I just get no module named swampy.TurtleWorld.<br>
  I'd really appreciate it if someone could help me out, here's a link to the lesson if that helps:<br>
  <a href="http://www.greenteapress.com/thinkpython/html/thinkpython005.html" rel="noreferrer">http://www.greenteapress.com/thinkpython/html/thinkpython005.html</a></p>