Answers for "python add key to dictionary if it doesn't exist"

python dict if key does not exist

d = {}
r = d.get('missing_key', None)

Posted by: Guest on June-30-2021

add key if not exists python

# credit to Stack Overflow user in the source link
# d is your dictionary

if key not in d:
    d[key] = value

Posted by: Guest on June-06-2021

python dictionary append value if key exists

from collections import defaultdict
d = defaultdict(list)
d['key'].append('mykey')

Posted by: Guest on June-07-2021

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