title: How to use pip with Python 3.x alongside Python 2.x
body: <p>I installed Python 3.x (besides Python 2.x on Ubuntu) and slowly started to pair modules I use in Python 2.x.</p>
  
  <p>So I wonder, what approach should I take to make my life easy by using pip for both Python 2.x and Python 3.x?</p>