python类比java动态代理

抄的

class Proxy(object):

    def __init__(self, target):
        self.target = target

    def __getattribute__(self, name):
        target = object.__getattribute__(self, "target")
        '''获取Proxy中属性target,是RealHello实例'''
        print(target)
        attr = object.__getattribute__(target, name)
        print(name)
        '''获取RealHello实例的prints方法'''
        print(attr)

        def newAttr(*args, **kwargs):  # 包装
            print ("before print")
            res = attr(*args, **kwargs)
            print ("after print")
            return res
        return newAttr


class RealHello(object):

    def prints(self, s):
        print ('hello', s)


if __name__ == '__main__':
    t = RealHello()
    p = Proxy(t)
    p.prints("world")