title: Append a new Column with Pandas Python
body: <p>I currently have a python script which pulls in Analytics data and churns out a CSV. I want to be able to add in a column in after the CSV has been created. I know which column number it has to go in and I would also like to populate each cell in that column as far down as the CSV goes.</p>
  
  <p>Is there any simple script, from Pandas, that would allow me to add on a column and populate the cells based on a loop I create?</p>
  
  <p>If any further information is needed please let me know, i'm still very new to python :) </p>
  
  <p>Cheers</p>