[已解决]关于《扩展阅读：Python Mixin 编程机制（转）》第三个插件方式的例子

void_island

class PlugIn(object):
    def __init__(self):
        self._exported_methods = []
        
    def plugin(self, owner):
        for f in self._exported_methods:
            owner.__dict__[f.__name__] = f

    def plugout(self, owner):
        for f in self._exported_methods:
            del owner.__dict__[f.__name__]

class AFeature(PlugIn):
    def __init__(self):
        super(AFeature, self).__init__()
        self._exported_methods.append(self.get_a_value)

    def get_a_value(self):
        print('a feature.')

class BFeature(PlugIn):
    def __init__(self):
        super(BFeature, self).__init__()
        self._exported_methods.append(self.get_b_value)

    def get_b_value(self):
        print('b feature.')
        

class Combine:pass

c = Combine()
AFeature().plugin(c)
BFeature().plugin(c)

c.get_a_value()
c.get_b_value()

没有理解具体怎么运作，求大佬尽量详细解析。。。

最佳答案

月排行榜 / 总排行榜

Stubborn

2020-6-5 12:35:12

c = Combine()
AFeature().plugin(c)

class AFeature(PlugIn):
    def __init__(self):
        super(AFeature, self).__init__()

class PlugIn(object):
    def __init__(self):
        self._exported_methods = []

self._exported_methods.append(self.get_a_value)

    def plugin(self, owner): #  这里的owner,就是Combine的实例化对象
        for f in self._exported_methods:
            owner.__dict__[f.__name__] = f

跳转到最佳答案楼层

Stubborn

c = Combine()
AFeature().plugin(c)

class AFeature(PlugIn):
    def __init__(self):
        super(AFeature, self).__init__()

class PlugIn(object):
    def __init__(self):
        self._exported_methods = []

self._exported_methods.append(self.get_a_value)

    def plugin(self, owner): #  这里的owner,就是Combine的实例化对象
        for f in self._exported_methods:
            owner.__dict__[f.__name__] = f

void_island

Stubborn 发表于 2020-6-5 12:35

大致能理解，感谢