title: copy a column in a .csv file to another using batch
body: <p>I have a file that has</p>
  
  <pre><code>Class,section,name
  Math,02,Scott
  </code></pre>
  
  <p>What I need is a .csv that copies a column so it looks like below</p>
  
  <pre><code>Class,section,name,class
  Math,02,Scott,Math
  </code></pre>
  
  <p>I am looking to do this using batch file commands.  Any suggestions?  I know how to do basic copy commands, and tried downloading python but was having trouble getting it to work</p>