python对象的序列换与反序列化

Posted 2021-02-28 雅虎跳跳

class Student:
    def __init__(self, id, name, sex) -> None:
        self.id = id
        self.name = name
        self.sex = sex

1、序列化。有s1 = Student(1001,‘ZhangSan‘,‘man‘)，将s1序列化为json：

import json
s_json = json.dumps(s1.__dict__)

2、反序列化。有s_json = ‘{“id”:“1001”, "name":"ZhangSan", "sex":"man"}’

解法一：反序列化，不同的类需要单独写一个反序列化的函数。对于Student类，如下：

class Student:
    def __init__(self, id, name, sex) -> None:
        self.id = id
        self.name = name
        self.sex = sex
　　@staticmethod
    def convert_json_to_student(self, s_json):
        s_json = json.loads(s_json)
        return Student(s_json["id"], s_json["name"], s_json["sex"])   

s1 = Student().convert_json_to_student(s_json)

或者

s1 = json.loads(s_json, object_hook=Student().convert_json_to_student)

解法二：写一个通用的反序列化类

class Json_to_object:
　　def __init__(self, d)
　　　　self.__dict__ = d

def copy_properties(object1, object2):
　　for i in object1.__dict__:
　　　 object1.__dict__.[i] = object2.__dict__.get(i) if(object2.__dict__.get(i) else object1.__dict__.[i]
s1 = json.loads(s_json, object_hook=Json_to_object)