Python 2.5中的类装饰器？

def log_decorator(cls):
    class DecoratedClass(cls):
        def __init__(self, *args, **kwargs):
            super(DecoratedClass, self).__init__(*args, **kwargs)
            self.log = []

        def method_with_logging(self):
            result = super(DecoratedClass, self).method_with_logging()
            self.log.append('Method called')
            return result

    return DecoratedClass

@log_decorator
class MyClass(object):
    def method_with_logging(self):
        return 'Hello, World!'

my_instance = MyClass()
print(my_instance.method_with_logging())  # 输出: Hello, World!
print(my_instance.log)  # 输出: ['Method called']