dict lookup log if None

lookup_log.py

import logging

d = {'foo': 42}

def log_if_none(message):
    logging.warning(message)

foo = d.get('foo', log_if_none("No key foo"))
bar = d.get('bar', log_if_none("No key bar"))
baz = d.get('baz', log_if_none("No key baz"))

print(foo, bar, baz)