import logging

l = logging.getLogger('abc')
l.setLevel(10)
l.addHandler(logging.StreamHandler())
l.info('ABC ONLY')
print("")

logging.warn('root warning?')
print("")
l.info('abc duplicate?')
print("")

l2 = logging.getLogger('cba')
l2.setLevel(10)
l2.addHandler(logging.StreamHandler())
l2.info('cba duplicate?')
print("")

l3 = logging.Logger("cab", logging.INFO)
l3.addHandler(logging.StreamHandler())
l3.info('cab, no duplicates')