def eqIterator(eqArray):
calculation = False
index = 0
parenCount = 0
leftNum = 0
rightNum = 0
PEMDAS = ['(', '^', '*', '/', '+', '-']
while index < len(PEMDAS):
for i in range(len(eqArray)):
place = eqArray[i]
if (place == '('):
parenCount = parenCount + 1
elif (place == ')'):
parenCount = parenCount - 1
if (parenCount == 0):
first_opening = eqArray.index('(')
recur_list = eqArray[first_opening + 1:i]
eqArray[i] = eqIterator(recur_list)
del eqArray[first_opening:i]
break
else:
if (place == PEMDAS[index]):
leftNum = eqArray[i - 1]
rightNum = eqArray[i + 1]
eqArray[i] = calculate(place, leftNum, rightNum)
eqArray.pop(i - 1)
eqArray.pop(i)
calculation = True
break
else:
continue
if (calculation == True):
calculation = False
continue
else:
index += 1
calculation = False
return float(eqArray[-1])
def test_add(self):
self.assertEqual(calculate('+', 3, 4), 7)
def test_expo(self):
self.assertEqual(calculate('^', 3, 2), 9)
def test_div(self):
self.assertAlmostEqual(calculate('/', 4, 5), 0.8)
def test_mult(self):
self.assertEqual(calculate('*', 3, 4), 12)
def test_sub(self):
self.assertEqual(calculate('-', 4, 3), 1)