title: A method that is called when the databases are updated via the admin panel
body: <p>the idea is that I will not need to, each time enter some data, the value of which depends on the value of other data. For example.</p>
  
  <pre><code>class Example(models.Model):
      1_score_team_1 = models.IntegerField()
      2_score_team_1 = models.IntegerField()
      1_score_team_2 = models.IntegerField()
      2_score_team_2 = models.IntegerField()
      total_score_of_team_1 = models.IntegerField()
      total_score_of_team_2 = models.IntegerField()
      def function:
          total_score_of_team_1 = 1_score_team_1 + 2_score_team_1
          total_score_of_team_2 = 1_score_team_2 + 2_score_team_2
      return update total score of two teams
  </code></pre>
  
  <p>This method should be called every time I enter data through the admin panel.</p>