def doMath(op, op1, op2):
if op == "*":
return Mathlibrary.mul(op1, op2)
elif op == "/":
return Mathlibrary.div(op1, op2)
elif op == "+":
return Mathlibrary.add(op1, op2)
elif op == "√":
return Mathlibrary.root(op2, op1)
elif op == "^":
return Mathlibrary.pow(op1, op2)
else:
return Mathlibrary.sub(op1, op2)
inputNumbers = inputNumbers.replace('\n', ' ')
#Count the numbers
for x in inputNumbers.split():
N += 1
#Profiling on one single string
if oneString:
subSum = createSubSum(inputNumbers)
nextSum = createSum(inputNumbers)
evalString = "2 √ ( ( 1 / ( {} - 1 ) ) * ( {} - {} ) )".format(
N, nextSum, subSum)
with PyCallGraph(output=GraphvizOutput()):
print(resolve(evalString))
#Profiling using side calculations
else:
firstSum = 0
secondSum = 0
with PyCallGraph(output=GraphvizOutput()):
#Calculate SUM of numbers and SUM of numbers^2
for x in inputNumbers.split():
firstSum = Mathlibrary.add(firstSum, float(x)) #sum of Xi
secondSum = Mathlibrary.add(secondSum,
Mathlibrary.pow(float(x), 2))
#N*(x')^2
firstSum = Mathlibrary.pow(Mathlibrary.div(firstSum, N), 2)
firstSum = Mathlibrary.mul(firstSum, N)
finalSum = Mathlibrary.sub(secondSum, firstSum)
#final formula
print(resolve("2 √ ( 1 / ( {} - 1 ) * {} )".format(N, finalSum)))
class MathLibraryTestPow(unittest.TestCase):
def setUp(self):
self.mathlib = Mathlibrary()
def testPowNegativeExponent(self):
with self.assertRaises(ValueError):
self.mathlib.pow(-5, -4)
with self.assertRaises(ValueError):
self.mathlib.pow(423, -5892)
def testPowFloatExponent(self):
with self.assertRaises(ValueError):
self.mathlib.pow(42, 4.20424)
with self.assertRaises(ValueError):
self.mathlib.pow(532.43, 49.00001)
def testPowZeroExponent(self):
self.assertEqual(self.mathlib.pow(0, 0), 1)
self.assertEqual(self.mathlib.pow(123, 0), 1)
self.assertEqual(self.mathlib.pow(-123, 0), 1)
self.assertEqual(self.mathlib.pow(-12.3, 0), 1)
self.assertEqual(self.mathlib.pow(12.3, 0), 1)
def testPowEvenExponent(self):
self.assertEqual(self.mathlib.pow(2, 2), 4)
self.assertEqual(self.mathlib.pow(12, 6), 2985984)
self.assertEqual(self.mathlib.pow(43, 4), 3418801)
self.assertEqual(self.mathlib.pow(-4, 2), 16)
self.assertEqual(self.mathlib.pow(-80, 4), 40960000)
def testPowOddExponent(self):
self.assertEqual(self.mathlib.pow(3, 3), 27)
self.assertEqual(self.mathlib.pow(47, 5), 229345007)
self.assertEqual(self.mathlib.pow(-12, 7), -35831808)
self.assertEqual(self.mathlib.pow(-37, 5), -69343957)