Django - QuerySet to multi-dimensional list

I have the following models:

class Fixture(models.Model):
    id = models.AutoField(primary_key=True)
    home_team = models.ForeignKey(Player, related_name="home")
    away_team = models.ForeignKey(Player, related_name="away")
    game_week = models.PositiveSmallIntegerField(max_length=2, default=0)

What I want to do i开发者_StackOverflow中文版s create a multi-dimensional list that groups all of my fixture objects by the 'game_week' property. For example:

   fixtures[0] = [<FixtureObject 1>, <FixtureObject 2>]
   fixtures[1] = [<FixtureObject 3>, <FixtureObject 4>]
   fixtures[2] = [<FixtureObject 5>]
   fixtures[3] = [<FixtureObject 6>]

Where the fixture list indexes are the different game weeks. What is the easiest, most pythonic way to do this?

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Easiest way to do it is to use a dictionary:

 fixtures = Fixture.objects.all()
 fixture_dict = {}
 for fixture in fixtures:
    fixture_dict.setdefault(fixture.game_week, []).append(fixture)