python打log

import glob
import logging
import logging.handlers
LOG_FILENAME='logging_rotatingfile_example.out'
# Set up a specific logger with our desired output level
my_logger = logging.getLogger('MyLogger')
my_logger.setLevel(logging.DEBUG)
# Add the log message handler to the logger
handler = logging.handlers.RotatingFileHandler(LOG_FILENAME,
                                                maxBytes=20,
                                                backupCount=5,
                                            )
my_logger.addHandler(handler)
# Log some messages
for i in range(20):
    my_logger.debug('i = %d' % i)
# See what files are created
    logfiles = glob.glob('%s*' % LOG_FILENAME)
    for filename in logfiles:
        print filename

循环打日志 ，第一个文件达到maxBytes大小后，就写入第二个文件  。。。。