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 MathLibraryTestDiv(unittest.TestCase):
def setUp(self):
self.mathlib = Mathlibrary()
def testDivByZero(self):
with self.assertRaises(ZeroDivisionError):
self.mathlib.div(2145, 0)
with self.assertRaises(ZeroDivisionError):
self.mathlib.div(0, 0)
def testDivPossitive(self):
self.assertEqual(self.mathlib.div(0, 2), 0)
self.assertEqual(self.mathlib.div(234, 2), 117)
self.assertEqual(self.mathlib.div(10206, 42), 243)
self.assertEqual(self.mathlib.div(11348337, 49127), 231)
def testDivNegative(self):
self.assertEqual(self.mathlib.div(-234, 117), -2)
self.assertEqual(self.mathlib.div(-10206, -42), 243)
self.assertEqual(self.mathlib.div(11348337, -49127), -231)
def testDivFloat(self):
self.assertAlmostEqual(self.mathlib.div(2, 3), 0.6666666666)
self.assertAlmostEqual(self.mathlib.div(345, -17), -20.294117647)
self.assertAlmostEqual(self.mathlib.div(840143, 4910), 171.1085539714)
self.assertAlmostEqual(self.mathlib.div(784.893253, 9523.7329), 0.08241445463)