提取json中的字段信息寫入到txt文件中

對於如下格式的json文件:

{"info": "Dogs-in-the-Wild", "split": "test",
 "annotations": [
{"category id": 327, "name": "image/test/642993587,1174882191.jpg", "image id": 0}, 
{"category id": 314, "name": "image/test/4245402554,4158758476.jpg", "image id": 1}
...]}

想要提取category id 和 name的信息並進行拼接得到如下格式的信息

image/test/642993587,1174882191.jpg;327

 python 代碼如下：

import json
import os
def readjson():
    //打開json文件，文件路徑要自己改
    with open("../jsonfile/test.json", 'r') as f:
        temp = json.loads(f.read())
        //獲得annotations中的內容
        print(temp['annotations'])
        i=0;
        file_handle = open('../jsonfile/text.txt', mode='w')
        //遍歷annotations中的每一項
        for t in temp['annotations']:
            //獲得name和category id
            str1 = temp['annotations'][i]['name']+';'
                    + str(temp['annotations'][i]['category id'])
            i=i+1;
            file_handle.writelines(str1+'\n')
            print(str1)
        print(i)
        file_handle.close()


if __name__ == '__main__':
    readjson()