def test_float(self):
FloatModel.objects.create(f1=27.5, f2=0.33)
obj = FloatModel.objects.annotate(f1_ln=Ln('f1'), f2_ln=Ln('f2')).first()
self.assertIsInstance(obj.f1_ln, float)
self.assertIsInstance(obj.f2_ln, float)
self.assertAlmostEqual(obj.f1_ln, math.log(obj.f1))
self.assertAlmostEqual(obj.f2_ln, math.log(obj.f2))
def test_decimal(self):
DecimalModel.objects.create(n1=Decimal('12.9'), n2=Decimal('0.6'))
obj = DecimalModel.objects.annotate(n1_ln=Ln('n1'), n2_ln=Ln('n2')).first()
self.assertIsInstance(obj.n1_ln, Decimal)
self.assertIsInstance(obj.n2_ln, Decimal)
self.assertAlmostEqual(obj.n1_ln, Decimal(math.log(obj.n1)))
self.assertAlmostEqual(obj.n2_ln, Decimal(math.log(obj.n2)))
def relevant_words(self, l, n):
# https://www.aclweb.org/anthology/W14-3110
tts = self.topicterm_set.annotate(
share=F('score') / F('alltopic_score'),
rel=l * Ln('score') + (1 - l) * Ln('share'),
).filter(rel__isnull=False).order_by('-rel')[:n].values(
'term__title', 'rel')
return tts
def resources(request):
resources = Resource.objects
resources = resources.select_related('module')
resources = resources.annotate(
has_rating_i=Cast('has_rating_history', IntegerField()))
resources = resources.annotate(
has_rating_f=Cast('has_rating_i', FloatField()))
resources = resources.annotate(priority=Ln(F('n_contests') + 1) +
Ln(F('n_accounts') + 1) +
2 * F('has_rating_f'))
resources = resources.order_by('-priority')
return render(request, 'resources.html', {'resources': resources})
def test_integer(self):
IntegerModel.objects.create(small=20, normal=15, big=1)
obj = IntegerModel.objects.annotate(
small_ln=Ln('small'),
normal_ln=Ln('normal'),
big_ln=Ln('big'),
).first()
self.assertIsInstance(obj.small_ln, float)
self.assertIsInstance(obj.normal_ln, float)
self.assertIsInstance(obj.big_ln, float)
self.assertAlmostEqual(obj.small_ln, math.log(obj.small))
self.assertAlmostEqual(obj.normal_ln, math.log(obj.normal))
self.assertAlmostEqual(obj.big_ln, math.log(obj.big))
def test_null(self):
IntegerModel.objects.create()
obj = IntegerModel.objects.annotate(null_ln=Ln('normal')).first()
self.assertIsNone(obj.null_ln)