Python之dict(或对象)与json之间的互相转化

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在Python语言中,json数据与dict字典以及对象之间的转化,是必不可少的操作。

在Python中自带json库。通过import json导入。

在json模块有2个方法,

loads():将json数据转化成dict数据
dumps():将dict数据转化成json数据
load():读取json文件数据,转成dict数据
dump():将dict数据转化成json数据后写入json文件
下面是具体的示例:

dict字典转json数据

import json
def dict_to_json():
    dict = {}
    dict[name] = many
    dict[age] = 10
    dict[sex] = male
    print(dict)  # 输出:{name: many, age: 10, sex: male}
    j = json.dumps(dict)
    print(j)  # 输出:{"name": "many", "age": 10, "sex": "male"}
if __name__ == __main__:
    dict_to_json()

对象转json数据

import json
def obj_to_json():
    stu = Student(007, 007, 28, male, 13000000000, [email protected])
    print(type(stu))  # <class json_test.student.Student>
    stu = stu.__dict__  # 将对象转成dict字典
    print(type(stu))  # <class dict>
    print(stu)  # {id: 007, name: 007, age: 28, sex: male, phone: 13000000000, email: [email protected]}
    j = json.dumps(obj=stu)
    print(j)  # {"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "[email protected]"}
if __name__ == __main__:
    obj_to_json()

json数据转成dict字典

import json

def json_to_dict():
    j = {"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "[email protected]"}
    dict = json.loads(s=j)
    print(dict)  # {id: 007, name: 007, age: 28, sex: male, phone: 13000000000, email: [email protected]}


if __name__ == __main__:
    json_to_dict()

json数据转成对象

import json
def json_to_obj():
    j = {"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "[email protected]"}
    dict = json.loads(s=j)
    stu = Student()
    stu.__dict__ = dict
    print(id:  + stu.id +  name:  + stu.name +  age:  + str(stu.age) +  sex:  + str(
        stu.sex) +  phone:  + stu.phone +  email:  + stu.email)  # id: 007 name: 007 age: 28 sex: male phone: 13000000000 email: 123@qq.com
if __name__ == __main__:
    json_to_obj()

json的load()dump()方法的使用

  • dump()方法的使用
import json

def dict_to_json_write_file():
    dict = {}
    dict[name] = many
    dict[age] = 10
    dict[sex] = male
    print(dict)  # {name: many, age: 10, sex: male}
    with open(1.json, w) as f:
        json.dump(dict, f)  # 会在目录下生成一个1.json的文件,文件内容是dict数据转成的json数据


if __name__ == __main__:
    dict_to_json_write_file()
  • load()的使用
import json
def json_file_to_dict():
    with open(1.json, r) as f:
        dict = json.load(fp=f)
        print(dict)  # {name: many, age: 10, sex: male}
if __name__ == __main__:
    json_file_to_dict()

 





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