title: sender and instance arguments of post_save signal in Django
body: <p>I'm confused with <a href="https://docs.djangoproject.com/en/3.2/ref/signals/#django.db.models.signals.post_save" rel="nofollow noreferrer">Django's post-save signal documentation</a>:</p>
  <blockquote>
  <p>sender
  The model class.</p>
  <p>instance
  The actual instance being saved.</p>
  </blockquote>
  <p>Is &quot;sender&quot; the class of the model instance <em>being saved</em>? Is &quot;instance&quot; an instance <em>of the sender model</em> ? i.e. if I registered a signal receiver to receive post_save signals from the User model using signal.connect(), would &quot;sender&quot; be the User model and &quot;instance&quot; be the instance of the User model being saved ?</p>