shapes_oop_example.py

import random

class Shape:
    def __init__(self, shape_name, shape_width, shape_symbol):
        self.name = shape_name
        self.width = shape_width
        self.symbol = shape_symbol

    def __str__(self):
        return self.name + " of size " + str(self.width) + " and area " + str(self.area())

    # This needs to be overridden
    def draw(self):
        print("Draw shape!")

    # This needs to be overridden
    def area(self):
        return 0


class Rectangle(Shape):
    def __init__(self, shape_width, shape_height, shape_symbol):
        Shape.__init__(self, "Rectangle", shape_width, shape_symbol)
        self.height = shape_height

    def __str__(self):
        return self.name + " of size " + str(self.width) + "x" + str(self.height) + " and area " + str(self.area())

    def draw(self):
        for row in range(self.height):
            print(self.width * self.symbol)

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


class Square(Shape):
    def __init__(self, shape_width, shape_symbol):
        Shape.__init__(self, "Square", shape_width, shape_symbol)

    def draw(self):
        for row in range(self.width):
            print(self.width * self.symbol)

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


class Triangle(Shape):
    def __init__(self, shape_width, shape_symbol):
        Shape.__init__(self, "Triangle", shape_width, shape_symbol)

    def draw(self):
        for row in range(1,self.width+1):
            print(row * self.symbol)

    def area(self):
        return 0.5 * self.width * self.width


def main():
    my_shapes = [Rectangle(5, 14, 'x'), Square(3, '*'), Triangle(4, '#')]
    random.shuffle(my_shapes)

    for shape in my_shapes:
        print(shape)
        shape.draw()


main()