def _make_books(self, n, base_date):
        for i in range(n):
            b = Book.objects.create(
                name='Book %d' % i,
                slug='book-%d' % i,
                pages=100+i,
                pubdate=datetime.timedelta(days=1) - base_date)
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.4/tests/regressiontests/generic_views/dates.py/ArchiveIndexViewTests._make_books/swapped operands of `-`