title: How to name Pandas Dataframe Columns automatically?
body: <p>I have a Pandas dataframe <code>df</code> with <strong>102</strong> columns. Each column is named differently, say <code>A, B, C</code> etc. to give the original dataframe following structure</p>
  
  <pre><code>         Column A.    Column B.  Column C.   ....
  Row 1.    
  Row 2.
  ---
  Row n
  </code></pre>
  
  <p>I would like to change the columns names from <code>A, B, C</code> etc. to <code>F1, F2, F3, ...., F102</code>. I tried using df.columns but wasn't successful in renaming them this way. Any simple way to automatically rename all column names to <code>F1 to F102</code> automatically, insteading of renaming each column name individually?</p>