代码

以下是一个基于 Python 的简单工厂方法模式的示例代码：

# 定义抽象图形类
class Shape:
    def draw(self):
        pass

# 定义具体图形类
class Circle(Shape):
    def draw(self):
        print("绘制圆形")

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

class Triangle(Shape):
    def draw(self):
        print("绘制三角形")

# 定义抽象工厂类
class ShapeFactory:
    def createShape(self):
        pass

# 定义具体工厂类
class CircleFactory(ShapeFactory):
    def createShape(self):
        return Circle()

class RectangleFactory(ShapeFactory):
    def createShape(self):
        return Rectangle()

class TriangleFactory(ShapeFactory):
    def createShape(self):
        return Triangle()

# 客户端代码
if __name__ == '__main__':
    circle_factory = CircleFactory()
    circle = circle_factory.createShape()
    circle.draw()

    rectangle_factory = RectangleFactory()
    rectangle = rectangle_factory.createShape()
    rectangle.draw()

    triangle_factory = TriangleFactory()
    triangle = triangle_factory.createShape()
    triangle.draw()

运行结果：

绘制圆形
绘制矩形
绘制三角形