title: no module called numpy
body: <p>I'm using ubuntu 14.04 and just installed python 3.4. 
  And on terminal I entered:</p>
  
  <p>sudo apt-get install python-numpy</p>
  
  <p>sudo apt-get install cython</p>
  
  <p>sudo apt-get install python-scipy</p>
  
  <p>sudo apt-get install python-matplotlib</p>
  
  <p>when I tried to run something on idle, it showed the massage:</p>
  
  <p>line 1, in 
      import numpy as n
  ImportError: No module named 'numpy'</p>
  
  <p>I don't know much about programming and i'm new to linux, but I think I either didn't install numpy at all or I installed it for a different version of python. What did I do wrong?</p>
  
  <p>thanks.</p>