Python读写json文件

# -*- coding utf-8 -*-

import json
import os

m = {
    "message": str("hello")
}

if not os.path.exists('test.json'):  # 不存在就创建
    print("create new file")
    with open('test.json', 'w') as json_file:
        json_file.write(json.dumps(m, sort_keys=True))
else:  # 存在直接打开
    print("exists")
    with open('test.json') as json_file:
        print(json.load(json_file))