title: Python ImportError while module is installed [Ubuntu]
body: <p>I'd like to make a switch from Windows to Linux (Ubuntu) writing my python programs but I just can't get things to work. Here's the problem: I can see that there are quite the number of modules pre-installed (like numpy, pandas, matplotlib, etc.) in Ubuntu. They sit nicely in the /host/Python27/Lib/site-packages directory. But when I write a test python script and try to execute it, it gives me an ImportError whenever I try to import a module (for instance <code>import numpy as np</code> gives me <code>ImportError: No module named numpy</code>). When I type <code>which python</code> in the commandline I get the <code>/usr/bin/python</code> path. I think I might need to change things related to the python path, but I don't know how to do that.</p>