title: python module import error without sudo
body: <p>I am using Ubuntu 14.04
  I have installed a module pymavlink using sudo pip install pymavlink 
  now when i run a code like</p>
  
  <blockquote>
    <p>python code.py</p>
  </blockquote>
  
  <p>it says no module names as pymavlink but when i run it as </p>
  
  <blockquote>
    <p>sudo python code.py</p>
  </blockquote>
  
  <p>it works fine, i don't understand whats the problem without sudo. 
  Also i have Python 2.7 and python 3 installed as they both came with Ubuntu.
  can someone please let me know the fix for this. </p>