结构型模式 - 桥接模式

将抽象化和实现化结构,使得二者可以独立变化

使用场景

一个类有两种独立变化的维度

Demo

"""
桥接模式
"""
class DrawAPI:
    def draw_circle(self, *args, **kwargs):
        raise NotImplementedError
class RedCircle(DrawAPI):
    def draw_circle(self, radius, x, y):
        print(f"drawing circle red : {radius}, {x} ,{y}")
class GreenCircle(DrawAPI):
    def draw_circle(self, radius, x, y):
        print(f"drawing circle green : {radius}, {x} ,{y}")
class Shape:
    def __init__(self, draw_api: DrawAPI):
        self.draw_api = draw_api
    def draw(self, radius, x, y):
        raise NotImplementedError
class Circle(Shape):
    def draw(self, radius, x, y):
        self.draw_api.draw_circle(radius, x, y)
if __name__ == '__main__':
    red_circle = Circle(RedCircle())
    green_circle = Circle(GreenCircle())
    red_circle.draw(100, 10, 10)
    green_circle.draw(200, 20, 20)