pickle错误异常_pickle.UnpicklingError和AttributeError

_pickle.UnpicklingError: NEWOBJ class argument isn't a type object

AttributeError: Can't get attribute 'admin' on <module '__main__' from 'C:PycharmProjects/subject_system/src/admin_interface.py'>

先看原来错误的代码 

import pickle
from conf import setting

with open(setting.ADMIN, 'rb') as file:
    print(pickle.load(file))

我在setting.ADMIN的路径的文件存的是自定义类admin实例化的对象，直接用pickle的load方法反序列化会抛出异常：

AttributeError: Can't get attribute 'admin' on <module '__main__' from 'C:PycharmProjects/subject_system/src/admin_interfa

ce.py'>

说是在admin_interface.py文件中找不到admin变量，于是我又导入了自定义的admin模块

import pickle
from src import admin
from conf import setting

with open(setting.ADMIN, 'rb') as file:
    print(pickle.load(file))

运行了一下 ，又抛出异常：

_pickle.UnpicklingError: NEWOBJ class argument isn't a type object

 百度了一下，也没找到解决方法

最后想了一下pickle反序列化的原理，反序列化应该是根据一个模板将二进制数据还原的过程，所以应该导入序列化时自定义类型

import pickle
from src.admin import admin
from conf import setting

with open(setting.ADMIN, 'rb') as file:
    print(pickle.load(file))
 

这下下运行结果正常了

{1: <src.admin.admin object at 0x05594D10>}

 总结：

在使用pickle反序列化的时候，要预先导入二进制数据中存在的自定义类数据的类