Python之dict(或对象)与json之间的互相转化

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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 jsondef 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 jsondef 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()

json数据转成dict字典

import jsondef 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 jsondef 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.comif __name__ == '__main__':    json_to_obj()

json的load()dump()方法的使用

  • dump()方法的使用
import jsondef 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 jsondef 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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