django trigger when an instance od data is deleted from model

1class ImageQuerySet(models.QuerySet):
2
3    def delete(self, *args, **kwargs):
4        for obj in self:
5            obj.img.delete()
6        super(ImageQuerySet, self).delete(*args, **kwargs)
7
8class Image(models.Model):
9    objects = ImageQuerySet.as_manager()
10    img = models.ImageField(upload_to=get_image_path)
11    ...
12    def delete(self, *args, **kwargs):
13        self.img.delete()
14        super(Image, self).delete(*args, **kwargs)
15