title: how to select data that contains multiple row from dataframe
body: <p>I wrote the command bellow :</p>
  <pre><code>pd.DataFrame(df.groupby(['CHAUFFEUR','comportement de conduit'])['comportement de conduit'].count())
  </code></pre>
  <p>I get the dataframe bellow :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th style="text-align: left;">CHAUFFEUR</th>
  <th style="text-align: center;">comportement de conduit</th>
  <th style="text-align: right;">comportement de conduit</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td style="text-align: left;">ABBAD DJELLOUL</td>
  <td style="text-align: center;">bad driving behaviour(reduce your acceleration)</td>
  <td style="text-align: right;">1</td>
  </tr>
  <tr>
  <td style="text-align: left;">ABBOU ABD EL KADER</td>
  <td style="text-align: center;">bad driving behaviour</td>
  <td style="text-align: right;">5</td>
  </tr>
  <tr>
  <td style="text-align: left;"></td>
  <td style="text-align: center;">bad driving behaviour(reduce your acceleration,increase your speed)</td>
  <td style="text-align: right;">14</td>
  </tr>
  <tr>
  <td style="text-align: left;">...</td>
  <td style="text-align: center;">...</td>
  <td style="text-align: right;">...</td>
  </tr>
  <tr>
  <td style="text-align: left;">ZIANE ABDELKADER</td>
  <td style="text-align: center;">good driving behaviour(try to reduce acceleration)</td>
  <td style="text-align: right;">18</td>
  </tr>
  <tr>
  <td style="text-align: left;"></td>
  <td style="text-align: center;">normal driving behaviour</td>
  <td style="text-align: right;">24</td>
  </tr>
  <tr>
  <td style="text-align: left;"></td>
  <td style="text-align: center;">very good driving behaviour</td>
  <td style="text-align: right;">4</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>Now I need to select for each <strong>CHAUFFEUR</strong> all numbers of his <strong>comportement de conduit</strong>
  for example for the second <strong>CHAUUFEUR</strong> named <strong>ABBOU ABD EL KADER</strong> i need to select only :</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th style="text-align: left;"></th>
  <th style="text-align: left;"></th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td style="text-align: left;">bad driving behaviour</td>
  <td style="text-align: left;">5</td>
  </tr>
  <tr>
  <td style="text-align: left;">bad driving behaviour(reduce your acceleration)</td>
  <td style="text-align: left;">41</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>So how can I do it please</p>