python中json与dict之间转换 - 风声风语

时间：2024-01-30 09:34:08

python中json与dict之间转换

Python之dict(或对象)与json之间的互相转化

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()
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15

对象转json数据

import json

def obj_to_json():
    stu = Student(\'007\', \'007\', 28, \'male\', \'13000000000\', \'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()
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15

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()
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11

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()
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13

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()
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 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()

相关文章