字典列表怎样合并字典中不同的值

有个字典列表是这样：
l = [
{"name": "mqx", "url": "www.google.com"},
{"name": "mqx", "url": "www.baidu.com"},
{"name": "other", "url": "www.baidu.com"},
]
希望的输出是：
output = [
{"name": "mqx", "url": ["www.google.com", "www.baidu.com"]},
{"name": "other", "url": "www.baidu.com"},
]

请问有什么好的方法吗，希望大神不令赐教

URL

name

mqx

字典

5 replies • 2017-12-16 12:22:20 +08:00

jatesun

Dec 16, 2017 via iPhone

遍历后放入字 list 而不是字符串

fml87

Dec 16, 2017

```
from collections import defaultdict
d = defaultdict(list)
for i in l:
d[i['name']].append(i['url'])
output = [{"name": i[0], "url": i[1]} for i in d.items()]
```

ns2250225

Dec 16, 2017

@fml87 感谢大神！

imn1

Dec 16, 2017

pandas groupby

如果仅仅是输出，就没必要用 pandas
不过如果像这种二维变三维，还有后续计算，可以试试 pandas

codingcrush

Dec 16, 2017

from itertools import groupby
print([{k: [item["url"] for item in v]} for k, v in groupby(l, key=lambda item: item["name"])])