python super 变参数问题（六）

参考链接

这是Python多层继承的一个特例，祖父，父亲，儿子都有 draw 方法，那么经过多次继承后，如何用一种通用的方法给不同层次的方法传递参数，特别是变长的，不定长度的参数。

class Root:
    def draw(self,**kwds):
        # the delegation chain stops here
        print('Root Drawing draw ')
        assert not hasattr(super(), 'draw')

class Shape(Root):
    def __init__(self,  **kwds):
        self.shapename = kwds['shapename']
        # print('Shape class',kwds)
        # super().__init__(**kwds)
    def draw(self):
        print('Drawing.  Setting shape to:', self.shapename)
        super().draw()

class ColoredShape(Shape):
    def __init__(self,  **kwds):
        self.color = kwds['color']
        
        # print('ColoredShape class',kwds)
        super().__init__(**kwds)
    def draw(self):
        print('Drawing.  Setting color to:', self.color)
        super().draw()

input_kwds={'color':'blue', 'shapename':'square'}
cs = ColoredShape(**input_kwds)
cs.draw()

Drawing.  Setting color to: blue
Drawing.  Setting shape to: square
Root Drawing draw