def test_evaluate_5(self):
expr = convert_to_postfix('(1-(5.44+3)*8)/7')
self.assertEqual(-9.502857142857144, expr.eval())
def test_convert_plus(self):
postfix = convert_to_postfix('5+ 7')
self.assertEqual('5.0,7.0,+', str(postfix))
def test_evaluate_3(self):
expr = convert_to_postfix('2*2+1')
self.assertEqual(5.0, expr.eval())
def test_evaluate_4(self):
expr = convert_to_postfix('(2*2+1)/2')
self.assertEqual(2.5, expr.eval())
def test_convert_parenthesis_2(self):
postfix = convert_to_postfix('(1-(5.44+3)*8)/7')
self.assertEqual('1.0,5.44,3.0,+,8.0,*,-,7.0,/', str(postfix))
def test_evaluate_2(self):
expr = convert_to_postfix('2*2')
self.assertEqual(4.0, expr.eval())
def test_convert_division(self):
postfix = convert_to_postfix('1-5.44/7+5*3/2')
self.assertEqual('1.0,5.44,7.0,/,-,5.0,3.0,*,2.0,/,+', str(postfix))
def test_convert_parenthesis_1(self):
postfix = convert_to_postfix('(2*2+1)/2')
self.assertEqual('2.0,2.0,*,1.0,+,2.0,/', str(postfix))
def test_convert_multiply(self):
postfix = convert_to_postfix('1-5.44*7+5*2')
self.assertEqual('1.0,5.44,7.0,*,-,5.0,2.0,*,+', str(postfix))
def test_convert_negative(self):
postfix = convert_to_postfix('-5.44+7-1--1')
self.assertEqual('5.44,(-),7.0,+,1.0,-,1.0,(-),-', str(postfix))
def test_convert_minus(self):
postfix = convert_to_postfix('5.44+7-1')
self.assertEqual('5.44,7.0,+,1.0,-', str(postfix))
def test_convert_plus_float(self):
postfix = convert_to_postfix('5.44+7')
self.assertEqual('5.44,7.0,+', str(postfix))
#!/usr/bin/env python
import argparse
from postfix import convert_to_postfix
if __name__ == '__main__':
parser = argparse.ArgumentParser(description='Evaluate formula')
parser.add_argument('formula',
metavar='"2+2*2"',
type=str,
help='String with formula')
args = parser.parse_args()
expression = convert_to_postfix(args.formula)
print(expression.eval())
