title: Problems in sorting a column by value
body: <p>I was trying to sort the food from the most caloric to the less caloric, I have a 2-column dataset (with about 2000 different foods), with the Name of the food and the Energy in kcal of that food.</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Name</th>
  <th>Energy, kcal</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>Fish</td>
  <td>80</td>
  </tr>
  <tr>
  <td>Meat</td>
  <td>70</td>
  </tr>
  <tr>
  <td>Oil</td>
  <td>900</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>I tried with:</p>
  <pre><code>df_Kcal.sort_values(by='Energy, kcal',ascending=False).head(10)
  </code></pre>
  <p>But as a result, i have a list of foods from 99kcal (The highest value it's 900kcal)</p>
  <div class="s-table-container">
  <table class="s-table">
  <thead>
  <tr>
  <th>Name</th>
  <th>Energy, kcal</th>
  </tr>
  </thead>
  <tbody>
  <tr>
  <td>Stockfish</td>
  <td>99</td>
  </tr>
  <tr>
  <td>Wine</td>
  <td>96</td>
  </tr>
  <tr>
  <td>lobster</td>
  <td>93</td>
  </tr>
  </tbody>
  </table>
  </div>
  <p>If I do the same code, with .sample(10) I can see foods with more calories around the dataset</p>
  <p>How can I sort it correctly?</p>
  <p>Thank you</p>