tricky folder structure problem
<p>This is my current folder structure, and i need to get the absolute path to the root folder</p>

<pre><code>- root/
----- api.py
----- programexecutablefolder/
--------- mainentry.py
</code></pre>

<p>The program has to start at mainentry.py, however I need to get the path of the root folder from api.py (though the entry to api.py is through mainentry.py)</p>

<p>Also <code>os.getcwd()</code> doesn't work as it will get the directory of mainentry.py</p>
