On 24/11/2023 16:35, duncan smith wrote:
On 24/11/2023 14:31, Loris Bennett wrote:
Hi,
I want to print some records from a database table where one of the
fields contains a JSON string which is read into a dict. I am doing
something like
print(f"{id} {d['foo']} {d['bar']}")
However, the dict does not always have the same keys, so d['foo'] or
d['bar'] may be undefined. I can obviously do something like
if not 'foo' in d:
d['foo']="NULL"
if not 'bar' in d:
d['bar']="NULL"
print(f"{id} {d['foo']} {d['bar']}")
Is there any more compact way of achieving the same thing?
Cheers,
Loris
Yes. e.g.
d.get('foo', "NULL")
Duncan
Or make d a defaultdict.
from collections import defaultdict
dic = defaultdict(lambda:'NULL')
dic['foo'] = 'astring'
dic['foo']
'astring'
dic['bar']
'NULL'
Duncan
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