title: python 2.7 not installing matplotlib
body: <p>Hi I'm trying to install matplotlib on my mac. I have lion OS X.</p>
  
  <p>my python version is <code>2.7.1</code> ( this is what it says when I run it from terminal) </p>
  
  <p>every time I install matplotlib, it promots this error </p>
  
  <pre><code>matplotlib 1.1.0 cannot be installed on this disk. matplotlib requires System python 2.7 to install. 
  </code></pre>
  
  <p>I'm new to the python world and I need a tool to graph a few things... so a clear explanation is much appreciated. </p>
  
  <p>Thanks! </p>