class Shape:
    def draw(self):
        print("绘制图形")

class Circle(Shape):
    def draw(self):
        print("绘制圆形")

class Rectangle(Shape):
    def draw(self):
        print("绘制矩形")

if __name__ == "__main__":
    s1 = Circle()
    s2 = Rectangle()

    s1.draw()
    s2.draw()