我将一个对象包裹在另一个对象中。“Wrapper”通过覆盖来访问“Wrapped”对象的属性__getattr__
。这很好用,直到我需要覆盖子类的属性,然后使用super()
.
我仍然可以直接访问该属性,__getattr__
但为什么不起作用super()
?
class Wrapped(object):
def __init__(self, value):
self.value = value
def hello_world(self):
print 'hello world', self.value
class Wrapper(object):
def __init__(self, obj):
self.wrapped_obj = obj
def __getattr__(self, name):
if name in self.__dict__:
return getattr(self, name)
else:
return getattr(self.wrapped_obj, name)
class Subclass(Wrapper):
def __init__(self, obj):
super(Subclass, self).__init__(obj)
def hello_world(self):
# this works
func = super(Subclass, self).__getattr__('hello_world')()
# this doesn't
super(Subclass, self).hello_world()
a = Wrapped(2)
b = Subclass(a)
b.hello_world()