title: Problem using PYTHONPATH
body: <p>I'm trying to use <code>PYTHONPATH</code> to let Python know where my library is located, but it seems to ignore it:</p>
  
  <pre><code>$ PYTHONPATH=/home/osqa/EC2/backup/src/boto/
  $ ls /home/osqa/EC2/backup/src/boto/boto/ec2/connection.py
  /home/osqa/EC2/backup/src/boto/boto/ec2/connection.py
  
  $ python backup.py
  Traceback (most recent call last):
    File "backup.py", line 4, in &lt;module&gt;
      from boto.ec2.connection import EC2Connection
  ImportError: No module named boto.ec2.connection
  </code></pre>