title: python: install two versions of same module
body: <p>To be more precise, I need to install two versions of Pandas. On one hand, I'm writing codes to be run on a server with pandas 0.13. All other part of my work, I want up-to-date pandas and other modules (0.16.1 for now).</p>
  
  <p>The two projects are not connected and I won't need two versions in one program.</p>
  
  <p>Is there a way to do that?</p>
  
  <p>Edit: I'm using Python 2.7.8 with Anaconda under Windows</p>