title: Multiple columns with the same name in Pandas
body: <p>I am creating a <code>dataframe</code> from a CSV file. I have gone through the docs, multiple SO posts, links as I have just started Pandas but didn't get it. The CSV file has multiple columns with same names say <code>a</code>.</p>
  
  <p>So after forming <code>dataframe</code> and when I do <code>df['a']</code> which value will it return? It does not return all values.</p>
  
  <p>Also only one of the values will have a string rest will be <code>None</code>. How can I get that column?</p>