logging example with syslog like formatting

log2file.py

import logging
import logging.handlers

LOG_FILE = 'test.log'

#logging.basicConfig(filename=LOG_FILE,
        #level=logging.DEBUG,
        #)
#logging.debug('this should be in the log file')

log = logging.getLogger(__file__)
log.setLevel(logging.DEBUG)

fmt = '%(asctime)s %(name)s: [%(levelname)s] %(message)s'
formatter = logging.Formatter(fmt, datefmt='%b %d %H:%M:%S')

handler = logging.handlers.RotatingFileHandler(
    LOG_FILE, maxBytes=300, backupCount=3)

handler.setFormatter(formatter)

log.addHandler(handler)

for i in range(50):
    msg = 'i = %d' % (i)
    if i % 2:
        log.debug(msg)
    else:
        log.warning(msg)


# log.debug('debug message')
# log.info('info message')
# log.warn('warn message')
# log.error('error message')
# log.critical('critical message')