The following script:

#/usr/bin/env python3
import logging
logger = logging.getLogger(name='main')
logger.setLevel(logging.INFO)
logger.error('XXX')
logging.error('ZZZ')
logger.error('XXX')

outputs

XXX
ERROR:root:ZZZ
ERROR:main:XXX

That is counter-intuitive: two logger.error('XXX') operators should output the same string, not two different strings "XXX" and "ERROR:main:XXX".

Please discuss how to make Python behave as a user could expect.