Python之dict（或对象）与json之间的相互转化

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。

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))  # 
    stu = stu.__dict__  # 将对象转成dict字典
    print(type(stu))  # 
    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: [email protected]


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()
  

   

 感谢作者的总结：https://blog.csdn.net/qq_33689414/article/details/78307018