Make JSON serialization easier

Related tags

JSONpythonjsonpython3
Overview

jsonlab

GitHub PyPI PyPI - Format PyPI - Python Version PyPI - Implementation PyPI - Downloads

介绍

众所周知,python内置的json不提供将json字符串序列化成json字符串(__dict__可序列化一层字典,不能递归) ,也不提供将json字符串反向序列化成类对象的功能,为了解决这个痛点,再多方寻找无果后,决心自己开发提供该功能的库,现已开发完毕,在此公布于大众,以造福全人类。

安装

pip3 install jsonlab

使用场景

该库适用于对自定义类型的json序列化和json反序列化,比如我们在网络通信时定义了自己的模型,我们便可通过该库来将自定义类型实例序列化成json字符串发送,或者将接收到得json字符串反序列化成类实例。

注意

由于json序列化和反序列化时我们需要知道对象的类型,然而python语言的弱类型特征不能直观的获取属性类型,所以在使用这个库时有个约定:

1. 自定义的类型必须实现 __init__ 方法,且 __init__ 方法中必须包含所有要序列化反序列化的属性,并且,这些属性必须作为形参出现在 __init__ 方法的形参列表中,并且需要有对应的类型注解

2. 序列化/反序列化时是以 __init__ 函数中形参名作为key值,所以为了防止不必要的bug,请保持形参名和属性名一致

例1:

下面的Person类是一个典型的满足需求的定义

class Person(object):
    def __init__(self, name: str, age: int):
        self.name = name
        self.age = age


# or

class Person(object):
    def __init__(self, name: str = "kainhuck", age: int = 18):
        self.name = name
        self.age = age

例2:

下面的Person类中hobby属性将不会被序列化或反序列化

class Person(object):
    def __init__(self, name: str, age: int, hobby):
        self.name = name
        self.age = age
        self.hobby = hobby


# or

class Person(object):
    def __init__(self, name: str, age: int):
        self.name = name
        self.age = age
        self.hobby = ""

例3:

下面例子演示了继承类的写法

class B(object):
    def __init__(self, b_name: str):
        self.b_name = b_name


class A(B):
    def __init__(self, a_name: str, b_name: str):
        super().__init__(b_name)
        self.a_name = a_name

例4:

下面的例子演示了属性是其他类型的情况

class B(object):
    def __init__(self, b_name: str):
        self.b_name = b_name


class A(object):
    def __init__(self, a_name: str, b: B):
        self.a_name = a_name
        self.b = b

例5:

下面的例子演示了列表的使用, 需要注意的是:

  1. 如果一个类的属性是个列表,则可以使用 list 或者 [子类型]

  2. 如果采用第二种写法,目前只支持一种类型,也就len([子类型]) == 1

  3. 子类型支持一下几种情况

    子类型名 描述
    str 内置类型 -- 字符串
    int 内置类型 -- 整数
    float 内置类型 -- 浮点数
    bool 内置类型 -- 布尔
    list 内置类型 -- 普通列表(内部不可为自定义类型)
    dict 内置类型 -- 普通字典(内部不可为自定义类型)
    object 表示支持任意类型(但是不支持自定义类型) [object] == list
    自定义类型 自定义类型,目前只支持一个,也就是说一个list内部只有一种自定义类型
    [子类型] 嵌套list
    {key类型:子类型} 嵌套字典
class A:
    def __init__(self, values: [str]):
        self.values = values


# or 

class B:
    def __init__(self, b_name: str):
        self.b_name = b_name


class A:
    def __init__(self, values: [B]):
        self.values = values


# or

class A:
    def __init__(self, values: [[str]]):
        self.values = values


# or

class A:
    def __init__(self, values: [{str: object}]):
        self.values = values

例6:

下面的例子演示了字典的使用,需要注意的是:

  1. 如果一个类的属性是个字典,则可以使用 dict 或者 {key类型:value类型}

  2. 如果采用第二种写法,目前只支持一种类型,也就len({key类型:value类型}) == 1

  3. key类型支持如下

    1. str
    2. int
    3. float
    4. bool
  4. value类型支持如下

    类型名 描述
    str 内置类型 -- 字符串
    int 内置类型 -- 整数
    float 内置类型 -- 浮点数
    bool 内置类型 -- 布尔
    list 内置类型 -- 普通列表(内部不可为自定义类型)
    dict 内置类型 -- 普通字典(内部不可为自定义类型)
    object 表示支持任意类型(但是不支持自定义类型) [object] == list
    自定义类型 自定义类型,目前只支持一个,也就是说一个list内部只有一种自定义类型
    [子类型] 嵌套list
    {key类型:子类型} 嵌套字典
class A:
    def __init__(self, values: {str: str}):
        self.values = values


# or 

class B:
    def __init__(self, b_name: str):
        self.b_name = b_name


class A:
    def __init__(self, values: {str: B}):
        self.values = values


# or

class A:
    def __init__(self, values: {str: [str]}):
        self.values = values


# or

class A:
    def __init__(self, values: {str: {str: object}}):
        self.values = values

Usage

接口

  • marshal(obj) -> str

    传递一个类实例,返回一个序列化后的json字符串

  • marshal_to_dict(obj) -> dict

    传递一个类实例,返回一个字典对象

  • unmarshal(json_, type_: type)

    第一个参数可以是: json字符串,bytes类型的json字符串,字典对象

    第二个参数是自定义类型

    返回自定义类型的实例

demo

json|dict to python object

Pyonize convert json|dict to python object Setup pip install pyonize Examples from pyonize import pyonize

bilal alpaslan 45 Nov 25, 2022
Json utils is a python module that you can use when working with json files.

Json-utils Json utils is a python module that you can use when working with json files. it comes packed with a lot of featrues Features Converting jso

Advik 4 Apr 24, 2022
Package to Encode/Decode some common file formats to json

ZnJSON Package to Encode/Decode some common file formats to json Available via pip install znjson In comparison to pickle this allows having readable

ZINC 2 Feb 02, 2022
cysimdjson - Very fast Python JSON parsing library

Fast JSON parsing library for Python, 7-12 times faster than standard Python JSON parser.

TeskaLabs 235 Dec 29, 2022
Console to handle object storage using JSON serialization and deserealization.

Console to handle object storage using JSON serialization and deserealization. This is a team project to develop a Python3 console that emulates the AirBnb object management.

Ronald Alexander 3 Dec 03, 2022
A Python tool that parses JSON documents using JsonPath

A Python tool that parses JSON documents using JsonPath

8 Dec 18, 2022
Editor for json/standard python data

Editor for json/standard python data

1 Dec 07, 2021
An tiny CLI to load data from a JSON File during development.

JSON Server - An tiny CLI to load data from a JSON File during development.

Yuvraj.M 4 Mar 22, 2022
JSONManipulator is a Python package to retrieve, add, delete, change and store objects in JSON files.

JSONManipulator JSONManipulator is a Python package to retrieve, add, delete, change and store objects in JSON files. Installation Use the package man

Andrew Polukhin 1 Jan 07, 2022
Small python wrapper around the valico rust library to provide fast JSON schema validation.

Small python wrapper around the valico rust library to provide fast JSON schema validation.

Simon J Knibbs 5 Jul 12, 2019
Simple, minimal conversion of Bus Open Data Service SIRI-VM data to JSON

Simple, minimal conversion of Bus Open Data Service SIRI-VM data to JSON

Andy Middleton 0 Jan 22, 2022
Ibmi-json-beautify - Beautify json string with python

Ibmi-json-beautify - Beautify json string with python

Jefferson Vaughn 3 Feb 02, 2022
A fast JSON parser/generator for C++ with both SAX/DOM style API

A fast JSON parser/generator for C++ with both SAX/DOM style API Tencent is pleased to support the open source community by making RapidJSON available

Tencent 12.6k Dec 30, 2022
JsonParser - Parsing the Json file by provide the node name

Json Parser This project is based on Parsing the json and dumping it to CSV via

Ananta R. Pant 3 Aug 08, 2022
Make JSON serialization easier

Make JSON serialization easier

4 Jun 30, 2022
Easy JSON wrapper modfied to wrok with suggestions

🈷️ Suggester Easy JSON wrapper modfied to wrok with suggestions. This was made for small discord bots, for big bots you should not use this. 📥 Usage

RGBCube 1 Jan 22, 2022
No more boilerplate to check and build a Python object from JSON.

JSONloader This module is for you if you're tired of writing boilerplate that: builds a straightforward Python object from loaded JSON. checks that yo

3 Feb 05, 2022
Fileson - JSON File database tools

Fileson is a set of Python scripts to create JSON file databases

Joonas Pihlajamaa 2 Feb 02, 2022
This open source Python project allow you to create JSON data trees using Minmup.com

This open source Python project allow you to create JSON data trees using Minmup.com. I try to develop this project all the time. But feel free to use :).

Arttu Väisänen 1 Jan 30, 2022
A fast streaming JSON parser for Python that generates SAX-like events using yajl

json-streamer jsonstreamer provides a SAX-like push parser via the JSONStreamer class and a 'object' parser via the ObjectStreamer class which emits t

Kashif Razzaqui 196 Dec 15, 2022