title: Deleting rowns based on column value does not work
body: <p>I am trying to delete some values from my dataframe with the command below:</p>
  <pre><code>df_merge = df_merge[df_merge['Exchange'] != 'false'] 
  </code></pre>
  <p>or</p>
  <pre><code>df_merge = df_merge[df_merge['Exchange'] != 'false'] 
  </code></pre>
  <p>I want to exclude all the rows that contain <code>&quot;false&quot;</code> in the column <code>Exchange</code>. Furthermore, I have used a similar code before to delete other rows, and it worked. I have no idea why it is not working now. The code runs, but no row is deleted, even though I have many rows with the value <code>&quot;false&quot;</code>.</p>
  <p>I have tried to replace &quot;false&quot; for 0 and that worked. I do not know why, though.</p>
  <p>Sample of df:</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>index</th>
  <th>price</th>
  <th>exchange</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>1</td>
  <td>20</td>
  <td>true</td>
  </tr>
  <tr>
  <td>2</td>
  <td>15</td>
  <td>false</td>
  </tr>
  <tr>
  <td>3</td>
  <td>17</td>
  <td>true</td>
  </tr>
  <tr>
  <td>4</td>
  <td>30</td>
  <td>false</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>All the columns are &quot;object&quot; type.</p>