title: use of python super function in django model
body: <p>Here's some code in a django tutorial that I'm going through.  I've never come across the super function in python before and the way it's used here is different from the examples I've seen online.  I.e., usually when you use super, don't you have multiple classes?  It's in the last line:  <code>super(Snippet, self).save(force_insert, force_update)</code>
  Could you explain exactly what's going on there and what would be an alternative way to write that.  It just seems like the save method is calling itself here?</p>
  
  <pre><code>class Snippet(models.Model):
      title = models.CharField(max_length=255)
      language = models.ForeignKey(Language)
      author = models.ForeignKey(User)
      description = models.TextField()
      description_html = models.TextField(editable=False)
      code = models.TextField()
      highlighted_code = models.TextField(editable=False)
      tags = TagField()
      pub_date = models.DateTimeField(editable=False)
      updated_date = models.DateTimeField(editable=False)
  
      class Meta:
          ordering = ['-pub_date']
  
      def __unicode__(self):
          return self.title
  
      def save(self, force_insert=False, force_update=False):
          if not self.id:
              self.pub_date = datetime.datetime.now()
          self.updated_date = datetime.datetime.now()
          self.description_html = markdown(self.description)
          self.highlighted_code = self.highlight()
          super(Snippet, self).save(force_insert, force_update)
  </code></pre>