def test_target_in_attributes(self):
"""
If target in attributes precision is 1.0.
"""
self.problem.attributes = [self.target]
self.this = self.classifier(self.corpus, self.problem)
prec = evaluation.precision(self.this, self.test_set)
self.assertEqual(prec, 1.0)
def test_target_in_attributes(self):
"""
If target in attributes precision is 1.0.
"""
self.problem.attributes = [self.target]
self.this = self.classifier(self.corpus, self.problem)
prec = evaluation.precision(self.this, self.test_set)
self.assertEqual(prec, 1.0)
def test_better_than_majority(self):
d = defaultdict(int)
for example in self.corpus:
d[self.target(example)] += 1
majority = max(d, key=d.get)
class MockClassifier(object):
def classify(self, example):
return majority, 1.0
mock = MockClassifier()
mock_prec = evaluation.precision(mock, self.target, self.test_set)
this_prec = evaluation.precision(self.this, self.target, self.test_set)
try:
self.assertGreaterEqual(this_prec, mock_prec)
except:
print self.corpus
def test_better_than_majority(self):
d = defaultdict(int)
for example in self.corpus:
d[self.target(example)] += 1
majority = max(d, key=d.get)
class MockClassifier(object):
def classify(self, example):
return majority, 1.0
mock = MockClassifier()
mock_prec = evaluation.precision(mock, self.target, self.test_set)
this_prec = evaluation.precision(self.this, self.target, self.test_set)
try:
self.assertGreaterEqual(this_prec, mock_prec)
except:
print self.corpus
def test_tolerates_empty_attributes(self):
self.problem.attributes = []
self.this = self.classifier(self.corpus, self.problem)
evaluation.precision(self.this, self.test_set)
def test_tolerates_empty_attributes(self):
self.problem.attributes = []
self.this = self.classifier(self.corpus, self.problem)
evaluation.precision(self.this, self.test_set)
def test_bad_testset(self):
test = []
with self.assertRaises(ValueError):
precision(self.c, test)
def test_is_0(self):
test = [(1, 3, 3), (1, 2, 2)]
p = precision(self.c, test)
self.assertEqual(p, 0.0)
def test_is_1(self):
test = [(0, 3, 3), (0, 2, 2)]
p = precision(self.c, test)
self.assertEqual(p, 1.0)
def test_bad_testset(self):
test = []
with self.assertRaises(ValueError):
precision(self.c, test)
def test_is_0(self):
test = [(1, 3, 3), (1, 2, 2)]
p = precision(self.c, test)
self.assertEqual(p, 0.0)
def test_is_1(self):
test = [(0, 3, 3), (0, 2, 2)]
p = precision(self.c, test)
self.assertEqual(p, 1.0)