title: How to add headers to a CSV file?
body: <p>I have a csv file like this:</p>
  
  <pre class="lang-none prettyprint-override"><code>Martin  2/12/17 ECPM_medio  0.23    smaller than    0.27    Incremento
  Martin  2/12/17 Fill_rate   1.53%   smaller than    2.19%   Incremento
  </code></pre>
  
  <p>I want to add some headers and save my CSV:</p>
  
  <pre class="lang-none prettyprint-override"><code>Cliente Fecha   Data        Numbers Info            Numbers2 Analisys
  Martin  2/12/17 ECPM_medio  0.23    smaller than    0.27    Incremento
  Martin  2/12/17 Fill_rate   1.53%   smaller than    2.19%   Incremento
  </code></pre>
  
  <p>I work with python 2.7. I can use CSV or Pandas libs!</p>