This was inspired by 31732.
The logging module has 5 log levels: CRITICAL, ERROR, WARNING, INFO, DEBUG per https://docs.python.org/dev/library/logging.html#logging-levels

However syslog(3) has for decades defined NOTICE and I can't think of a good reason why this level was carried through. It serves a very useful distinction from routine and not really attention-worthy messages (INFO) but don't rise to actual WARNINGs. Things like failed authentication attempts are not warnings but also not messages to casually ignore. Hence NOTICE. Individual timed out connection attempts but before all attempts exhausted, and many other examples exist.