triangle.py

#!/bin/env python
import math

class GeometricObject :
    def __init__(self):
        self.color= 'black'
        self.filled = 0

    def getColor(self):
        return self.color

    def getFilled(self):
        return self.filled

    def setColor(self,color):
        self.color = color

    def setFilled(self, filled):
        self.filled = filled

class Triangle(GeometricObject):
    def __init__(self):
        super().__init__()
        self.side1 = 1.0
        self.side2 = 1.0
        self.side3 = 1.0

    def setSides(self,side1,side2,side3):

        if((side1 + side2) <= side3) or ((side1 + side3) <= side2) or ((side3 + side2) <= side1):
            raise RuntimeError('The given three sides cannot form a triangle')

        self.side1 = side1
        self.side2 = side2
        self.side3 = side3

    def getArea(self):
        s = (self.side1 + self.side2 + self.side3) / 2
        area = math.sqrt( s* (s-self.side1) * (s-self.side2) * (s-self.side3))
        return area

    def getPerimeter(self):
        return (self.side1 + self.side2 + self.side3)

    def __str__(self):
        output = ("Triangle: side1 = " + str(self.side1) + " side2 = " + str(self.side2) + " side3 = " + str(self.side3)+" color = "+self.color)
        output = output+" Filled: "

        if(self.filled == 0):
            output = output+ "No"
        else:
            output = output+"Yes"
        return output


tria1 = Triangle()
print(tria1, " Area: ",tria1.getArea(), " Perimeter: ",tria1.getPerimeter())
tria2 = Triangle()
tria2.setSides(2,4,5)
print(tria2, " Area: ",tria2.getArea(), " Perimeter: ",tria2.getPerimeter())