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import math
from django.db.models.functions import Pi
from django.test import TestCase
from ..models import FloatModel
class PiTests(TestCase):
def test(self):
FloatModel.objects.create(f1=2.5, f2=15.9)
obj = FloatModel.objects.annotate(pi=Pi()).first()
self.assertIsInstance(obj.pi, float)
self.assertAlmostEqual(obj.pi, math.pi, places=5)
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