import logging

#references

#https://docs.python.org/ko/3/howto/logging-cookbook.html#logging-cookbook

#https://docs.python.org/ko/3/howto/logging.html#useful-handlers

logging.basicConfig(level = logging.INFO)

l = logging.getLogger()

l.setLevel(logging.INFO)

l.info('a')

capi = logging.getLogger('capi')

print(capi.handlers)

console = logging.StreamHandler()

BF = '%(asctime)s:'+logging.BASIC_FORMAT

formatter = logging.Formatter(BF)

console.setFormatter(formatter)

console.setLevel(logging.INFO)

capi.addHandler(console)

capi.propagate=False

capi.info('a')

import logging

# set up logging to file - see previous section for more details

logging.basicConfig(level=logging.DEBUG,

format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',

datefmt='%m-%d %H:%M',

filename='myapp.log',

filemode='w')

# define a Handler which writes INFO messages or higher to the sys.stderr

console = logging.StreamHandler()

console.setLevel(logging.INFO)

# set a format which is simpler for console use

formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')

# tell the handler to use this format

console.setFormatter(formatter)

# add the handler to the root logger

logging.getLogger('').addHandler(console)

# Now, we can log to the root logger, or any other logger. First the root...

logging.info('Jackdaws love my big sphinx of quartz.')

# Now, define a couple of other loggers which might represent areas in your

# application:

logger1 = logging.getLogger('myapp.area1')

logger2 = logging.getLogger('myapp.area2')

logger1.debug('Quick zephyrs blow, vexing daft Jim.')

logger1.info('How quickly daft jumping zebras vex.')

logger2.warning('Jail zesty vixen who grabbed pay from quack.')

logger2.error('The five boxing wizards jump quickly.')