def _algorithm(self):
if len(self._data) == 2:
point_a = self._data[0]
point_b = self._data[1]
if len(point_a) == len(point_b):
try:
dividend = sum(map(operator.mul, point_b, point_a))
divider = Norm.calculate(point_b) * Norm.calculate(point_a)
self._result = 1 - (dividend / divider)
except ArithmeticError:
raise ArithmeticError("float division by zero")
else:
raise ArithmeticError("You cant calculate Cosine distance of array has different sizes.")
else:
raise ArithmeticError("You must enter two array to find Cosine distance.")
def test_algorithm(self):
test_logger.debug("NormTest - test_algorithm Starts")
data = [1, -2]
norm = Norm.calculate(data)
result = math.sqrt(5)
self.assertEquals(result, norm)
data = [1, 2, 3, 4]
norm = Norm.calculate(data)
self.assertEquals(5.477225575051661, norm)
data = (5, 6, 7, 8)
norm = Norm.calculate(data)
self.assertEquals(13.19090595827292, norm)
data = [3, 1, 4, 1]
norm = Norm.calculate(data)
self.assertEquals(5.196152422706632, norm)
data = [3, 1, 5, 5, 5, 3]
norm = Norm.calculate(data)
self.assertEquals(9.695359714832659, norm)
data = [3]
norm = Norm.calculate(data)
self.assertEquals(3.0, norm)
data = [[3], [4, 5, 6]]
with self.assertRaises(TypeError) as context:
norm = Norm.calculate(data)
self.assertEqual('float() argument must be a string or a number',
context.exception.message)
data = [["a"], [4]]
with self.assertRaises(TypeError) as context:
norm = Norm.calculate(data)
self.assertEqual("float() argument must be a string or a number",
context.exception.message)
test_logger.debug("NormTest - test_algorithm Ends")
def test_algorithm(self):
test_logger.debug("NormTest - test_algorithm Starts")
data = [1, -2]
norm = Norm.calculate(data)
result = math.sqrt(5)
self.assertEquals(result, norm)
data = [1, 2, 3, 4]
norm = Norm.calculate(data)
self.assertEquals(5.477225575051661, norm)
data = (5, 6, 7, 8)
norm = Norm.calculate(data)
self.assertEquals(13.19090595827292, norm)
data = [3, 1, 4, 1]
norm = Norm.calculate(data)
self.assertEquals(5.196152422706632, norm)
data = [3, 1, 5, 5, 5, 3]
norm = Norm.calculate(data)
self.assertEquals(9.695359714832659, norm)
data = [3]
norm = Norm.calculate(data)
self.assertEquals(3.0, norm)
data = [[3], [4, 5, 6]]
with self.assertRaises(TypeError) as context:
norm = Norm.calculate(data)
self.assertEqual("float() argument must be a string or a number", context.exception.message)
data = [["a"], [4]]
with self.assertRaises(TypeError) as context:
norm = Norm.calculate(data)
self.assertEqual("float() argument must be a string or a number", context.exception.message)
test_logger.debug("NormTest - test_algorithm Ends")