python之dict(或对象)与json之间的互相转化

时间：2021-01-27 16:05:27

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('', '', 28, 'male', '', '123@qq.com')

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': '123@qq.com'}

j = json.dumps(obj=stu)

print(j) # {"id": "007", "name": "007", "age": 28, "sex": "male", "phone": "13000000000", "email": "123@qq.com"}

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": "123@qq.com"}'

dict = json.loads(s=j)

print(dict) # {'id': '007', 'name': '007', 'age': 28, 'sex': 'male', 'phone': '13000000000', 'email': '123@qq.com'}

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": "123@qq.com"}'

    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()与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()

转自：https://blog.csdn.net/qq_33689414/article/details/78307018

相关文章