json.dump()和json.load()

import json,time
# save data to json file
def store(data):
    with open('data.json', 'w') as fw:
        # 将字典转化为字符串
        # json_str = json.dumps(data)
        # fw.write(json_str)
        # 上面两句等同于下面这句
        json.dump(data,fw)
# load json data from file
def load():
    with open('data.json','r') as f:
        data = json.load(f)
        return data
 
if __name__ == "__main__":
    json_data = '{"login":[{"username":"aa","password":"001"},{"username":"bb","password":"002"}],"register":[{"username":"cc","password":"003"},{"username":"dd","password":"004"}]}'
    # 函数是将json格式数据转换为字典
    data = json.loads(json_data)
    store(data)
 
    data = load()
    print(data)