python用泡菜代替自我。

Question

我使用泡菜来实例化对象，如何解决没有成功分配的问题？

我使用picke.loads和picke.dumps步骤有什么问题吗？

mycode

import pickle


class A():
    def __init__(self, nid):
        self.nid = nid
        self._data_dict = {}

    def initData(self, nid, pickle_data=None):
        if nid == 2:
            print("use picke")
            self = pickle.loads(pickle_data)
            print(f"pickle loads _data_dict:{self._data_dict}")
        else:
            print("normal")
            self._data_dict['key'] = 1


if __name__ == '__main__':
    a = A(1)
    a.initData(1)
    print(f"a _data_dict::{a._data_dict}")
    pickle_data = pickle.dumps(a, 0)

    print('-'*100)
    b = A(2)
    b.initData(2, pickle_data)
    print(f"b _data_dict::{b._data_dict}")

结果

normal
a _data_dict::{'key': 1}
----------------------------------------------------------------------------------------------------
use picke
pickle loads _data_dict:{'key': 1}
b _data_dict::{}