相关疑难解决方法(0)

下面的最小示例使用一个虚拟装饰器，该装饰器在构造装饰类的对象时仅打印一些消息。

import pickle


def decorate(message):
    def call_decorator(func):
        def wrapper(*args, **kwargs):
            print(message)
            return func(*args, **kwargs)

        return wrapper

    return call_decorator


@decorate('hi')
class Foo:
    pass


foo = Foo()
dump = pickle.dumps(foo) # Fails already here.
foo = pickle.loads(dump)

但是，使用它会pickle引发以下异常：

_pickle.PicklingError: Can't pickle <class '__main__.Foo'>: it's not the same object as __main__.Foo

有什么我可以解决的吗？