uscpycourse/shapes.py at master · jahernando/uscpycourse · GitHub

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import math

class IShape:
    """ Interface for Shape classes, defines the perimeter and area methods
    """

    def perimeter(self):
        """ returns the perimeter of the shape
        """
        return None

    def area(self):
        """ returns the area of the shape
        """
        return None


class Disk(IShape):
    """ Disk Shape class
    """

    def __init__(self, radius):
        self.radius = radius
        return

    def perimeter(self):
        return 2.*math.pi*self.radius

    def area(self):
        return math.pi*self.radius*self.radius


class Rectangle(IShape):
    """ Rectangle Shape class
    """

    def __init__(self, width, height):
        self.width = width
        self.height = height
        return

    def perimeter(self):
        return 2.*(self.width+self.height)

    def area(self):
        return self.width*self.height


class Square(Rectangle):
    """ Square Shape class
    """

    def __init__(self, size):
        Rectangle.__init__(self, size, size)
        return