A Python logging module file

logger1.py

import logging

logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

formatter = logging.Formatter('[%(levelname)s] %(message)s')

handler_stream = logging.StreamHandler()
handler_stream.setFormatter(formatter)
handler_stream.setLevel(logging.INFO)

handler_file = logging.FileHandler(__name__ + '.log')
handler_file.setFormatter(formatter)

logger.addHandler(handler_stream)
logger.addHandler(handler_file)

def foo():
    logger.debug('Dump debug message')
    logger.info('Dump info message')
    logger.warn('Dump warn message')
    logger.error('Dump error message')
    logger.critical('Dump critical message')