Python custom class object serialized into Json string (code example)-Python Tutorial-php.cn

Python custom class object serialized into Json string (code example)

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Release： 2019-03-06 17:28:08

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The content of this article is about serializing Python custom class objects into Json strings (code examples). It has certain reference value. Friends in need can refer to it. I hope It will help you.

I have implemented Python before: deserializing Json strings into custom class objects. This time I will implement Json serialization.

The test code and results are as follows:

import Json.JsonTool
class Score:
    math = 0
    chinese = 0
class Book:
    name = &#39;&#39;
    type = &#39;&#39;
class Student:
    id = &#39;&#39;
    name = &#39;&#39;
    score = Score()
    books = [Book()]
student = Student()
json_data = &#39;{"id":"123", "name":"kid", "score":{"math":100, "chinese":98}, &#39; \
            &#39;"books":[{"name":"math", "type":"study"}, &#39; \
            &#39;{"name":"The Little Prince", "type":"literature"}]} &#39;
Json.JsonTool.json_deserialize(json_data, student)
print(student.name)
print(student.score.math)
print(student.books[1].name)
student_str = Json.JsonTool.json_serialize(student)
print(student_str)
input("\n按回车键退出。")

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Running results:

kid100The Little Prince
{"books": [{"name": "math", "type": "study"}, {"name": "The Little Prince", "type": "literature"}], "id": "123", "name": "kid", "score": {"chinese": 98, "math": 100}}

按回车键退出。

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The implementation code is as follows:

def json_serialize(obj):
    obj_dic = class2dic(obj)
    return json.dumps(obj_dic)


def class2dic(obj):
    obj_dic = obj.__dict__
    for key in obj_dic.keys():
        value = obj_dic[key]
        obj_dic[key] = value2py_data(value)
    return obj_dic


def value2py_data(value):
    if str(type(value)).__contains__(&#39;__main__&#39;):
        # value 为自定义类
        value = class2dic(value)
    elif str(type(value)) == "<class &#39;list&#39;>":
        # value 为列表
        for index in range(0, value.__len__()):
            value[index] = value2py_data(value[index])
    return value

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