gistfile1.py

try:
    django_obj = self.django_model.objects.get(my_field=value)
except self.django_model.DoesNotExist:
    try:
        django_obj = self.django_model.objects.get(**{
                'other_field1': other_value1,
                'other_field2': other_value2,
                'other_field3': other_value3,
                'other_field4': other_value4,
            })
        django_obj.my_field = value
        django_obj.save()
    except self.django_model.DoesNotExist:
        django_obj = self.django_model.objects.create(my_field=value)