Problem with import bob.core

Looks like

import bob.core
logger = bob.core.log.setup("bob.rppg.base")
bob.core.log.set_verbosity_level(logger, args['--verbose'])

does not work, whereas

import bob.core
logger = bob.core.log.setup("bob.rppg.base")

from bob.core.log import set_verbosity_level
set_verbosity_level(logger, args['--verbose'])

does work ...