怎样用 Python 转换这段代码

源代码：
[
{"userid":"Change","tags":[{"type":1,"tag_id":"e" }],},
{"userid":"andy.lei","tags":[{"type":1,"tag_id":"eg" },{"type":1,"tag_id":"ti"}],}
]

希望用 python 处理后变成：
[
{"userid":"change","tagid":"e"},{"userid":"andy.lei","tagid":"eg"},{"userid":"andy.lei","tagid":"ti"}
]

求实现方法

userid

tagid

lei

tag_id

6 条回复 • 2021-03-10 12:27:29 +08:00

wuwukai007

2021-03-08 23:48:25 +08:00

import pandas as pd
from pandas.io.json import json_normalize
json_normalize(a,'tags',['userid']).drop('type',axis=1).to_dict('records')
如果觉得有用，请务必回复我，不然我会伤心的😥

Macv1994

2021-03-08 23:54:06 +08:00

https://7.dusays.com/2021/03/08/4696a71306c35.png

DGideas

2021-03-09 00:13:27 +08:00

上边的方法都不太好哇。。。

```python
a = [
{"userid":"Change","tags":[{"type":1,"tag_id":"e" }],},
{"userid":"andy.lei","tags":[{"type":1,"tag_id":"eg" },{"type":1,"tag_id":"ti"}],}
]

result = []
[*map(lambda x: result.extend([{"userid": x["userid"], "tagid": tag["tag_id"]} for tag in x["tags"]]), a)]
print(result)
```

DGideas

2021-03-09 00:15:08 +08:00

https://gist.github.com/DGideas/c6ba07e7be68b00c24ac5751be37da16

dll30

2021-03-09 21:21:50 +08:00

我愣是没看懂你想怎么转,给个说明呀

cbiqih

2021-03-10 12:27:29 +08:00

```python
users = [
{"userid": "Change", "tags": [{"type": 1, "tag_id": "e"}], },
{"userid": "andy.lei", "tags": [{"type": 1, "tag_id": "eg"}, {"type": 1, "tag_id": "ti"}], }
]

result = [{'userid': user['userid'], 'tagid': tag['tag_id']} for user in users for tag in user['tags']]
print(result)
```