Sample max level filter

max-level-filter.md

import logging

class MaxLevelFilter(logging.Filter):
    def __init__(self, max_level=None):
        self.max = logging._checkLevel(max_level)

    def filter(self, record):
        return record.levelno <= self.max


import sys
logger = logging.getLogger()
logger.setLevel(logging.DEBUG)
stdout = logging.StreamHandler(sys.stdout)
stdout.setLevel("DEBUG")
stdout.addFilter(MaxLevelFilter("INFO"))
stderr = logging.StreamHandler(sys.stderr)
stderr.setLevel("WARNING")
logger.addHandler(stdout)
logger.addHandler(stderr)

logger.info('INFO')
logger.error('ERROR')

$ python3 max_filter.py
INFO
ERROR
$ python3 max_filter.py > /dev/null
ERROR
$ python3 max_filter.py 2> /dev/null
INFO