python-操作json

操作json

loads

将字符串转换成python对象

import json
str1 = '{"username": "marton", "psw": "123456"}'
dict1 = json.loads(str1)
print(dict1) #{'username': 'marton', 'psw': '123456'}
print(type(dict1)) #<class 'dict'>

load

从文件中加载解析成一个python对象

user_info.json

{"user": "marton", "psw": "123456"}

import json
dict1 = {"user": "marton", "psw": "123456"}
with open('user_info.json') as f:
    dict1 = json.load(f)

print(dict1) #{'user': 'marton', 'psw': '123456'}
print(type(dict1)) #<class 'dict'>

dump

把一个python对象以json的形式写入文件

import json
dict1 = {"user": "marton", "psw": "123456"}
with open('user_info.json', 'w') as f:
    json.dump(dict1, f)

dumps

将一个python对象转换成json

import json
dict1 = {"user": "marton", "psw": "123456"}
str1 = json.dumps(dict1)
print(str1) #{"user": "marton", "psw": "123456"}
print(type(str1)) #<class 'str'>

对json操作进行封装

import json

class OperateJson:
    """
        操作json
    """
    def __init__(self, file_path=None):
        if file_path:
            self.file_path = file_path
        else:
            self.file_path = '../data_config/user.json'
        self.data = self.load_json_data()

    #读取json文件
    def load_json_data(self):
        with open(self.file_path) as fp:
            data = json.load(fp)
        return data

    #根据键获取数据
    def get_data(self, key):
        return self.data[key]

    #将数据写入json文件中
    def write_data(self, data):
        with open('../data_config/cookie.json', 'w') as fp:
            json.dump(data, fp)

if __name__ == '__main__':
    oper_json = OperateJson()
    oper_json.write_data({'cookie': '123456'})