In Django, can you add a method to querysets?

As of django 1.7, the ability to use a query set as a manager was added:

class PersonQuerySet(models.QuerySet):
    def authors(self):
        return self.filter(role="A")

    def editors(self):
        return self.filter(role="E")

class Person(models.Model):
    first_name = models.CharField(max_length=50)
    last_name = models.CharField(max_length=50)
    role = models.CharField(max_length=1, choices=(('A', _('Author')),
                                                   ('E', _('Editor'))))
    people = PersonQuerySet.as_manager()

Resulting the following:

Person.people.authors(last_name="Dahl")

In addition, the ability to add custom lookups was also added.