title: Google foo.bar Challenge Issue: Can't import libraries
body: <p>I am working on a problem (doomsday_fuel) using python and I need to use matrices, so I would like to import numpy. I have solved the problem and it runs perfectly on my own computer, but Google returns the error: <strong>ImportError: No module named numpy [line 3].</strong></p>
  
  <p>The beginning of my code looks like:</p>
  
  <p><code>import fractions
  from fractions import Fraction
  import numpy as np</code></p>
  
  <p>I have checked constraints.txt and they do not seem to restrict numpy </p>
  
  <p>"Your code will run inside a Python 2.7.6 sandbox. Standard libraries are supported except for bz2, crypt, fcntl, mmap, pwd, pyexpat, select, signal, termios, thread, time, unicodedata, zipimport, zlib."</p>
  
  <p>Does anyone have any ideas how or why this would happen? Or do people have ideas as to what steps I could take to ask Google about this?</p>