title: how to remove auto indexing in pandas dataframe?
body: <p>How to remove auto indexing in <code>pandas</code> dataframe? drop index does not work.
  So when I used <code>df.iloc[0:4]['col name']</code>, it always returns two-column, one for the actual data that I need, one for the auto row index. How could I get rid of the auto indexing and only return the column that I need?</p>
  <p>This is what <code>iloc[0:4]['col name']</code> returns :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th></th>
  <th></th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>0</td>
  <td>id2</td>
  </tr>
  <tr>
  <td>1</td>
  <td>id2</td>
  </tr>
  <tr>
  <td>2</td>
  <td>id1</td>
  </tr>
  <tr>
  <td>3</td>
  <td>id3</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>and below is what I actually want :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th></th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>id2</td>
  </tr>
  <tr>
  <td>id2</td>
  </tr>
  <tr>
  <td>id1</td>
  </tr>
  <tr>
  <td>id3</td>
  </tr>
  </tbody>
  </table>
  </div>