Let's suppose that I want to get the first value of key
that is not null inside this list of dicts:
arr = [
{
"key": None,
"anotherkey": 0
},
{
"another": "ignore"
},
{
"bool": True,
"key": "this!"
}
]
Is there some one-liner to do this? I made it using a for loop.
You can loop over the inner dictionaries and check for a key
that isn't None
using a generator expression within next
:
>>> next((d['key'] for d in arr if d.get('key') is not None), None)
'this!'
This will return the first value associated with 'key'
, otherwise None
if no such key/value pairs exist.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.