I'd like to be able to check if a JSON key is empty, then have the script exit depending on the result.
I have the following JSON:
{
"changed": false,
"results": []
}
If the "results" key is empty, as it is above, I want the script to exit with a return code of 0, otherwise it should return 1.
I've tried
import json, sys
obj=json.load(sys.stdin)
if obj["results"]=="":
exit(0)
else:
exit(1)
But this produces:
IndexError: list index out of range
Check both, the key existence and its length:
import json, sys
obj=json.load(sys.stdin)
if not 'results' in obj or len(obj['results']) == 0:
exit(0)
else:
exit(1)
if not obj.get('results'): would be far more concise. However, the question is unclear, as there is no list access in the question so the exception makes no sense.
import json, sys
obj=json.load(sys.stdin)
if len(obj["results"])==0:
exit(0)
else:
exit(1)
try using the length of obj["results"]
if not 'results' in obj? Which I guess becomessys.exit(int(not 'results' in obj))- I'm a bit confused where the title of your question fits into this - so I'm not sure what answer you're really after.obj['result']will produce[], not"", so the condition fails.