1、输出到单个文件test中。

import logging

logging.basicConfig(filename='test',level=logging.INFO,

format='%(asctime)s %(message)s',datefmt='%m/%d/%Y %I:%M:%S %p')

logging.debug('nihao')

logging.critical('serious error')

2、输出到屏幕和多个文件。

import logging

#create logger

logger = logging.getLogger('TEST-LOG')

logger.setLevel(logging.DEBUG) #==》表示日志级别最低就是debug。

# create console handler and set level to debug

ch = logging.StreamHandler()

ch.setLevel(logging.DEBUG)

# create file handler and set level to warning

fh = logging.FileHandler("access.log")

fh.setLevel(logging.WARNING)

# create formatter

formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# add formatter to ch and fh

ch.setFormatter(formatter)

fh.setFormatter(formatter)

# add ch and fh to logger

logger.addHandler(ch)

logger.addHandler(fh)

# 'application' code

logger.debug('debug message')

logger.info('info message')

logger.warn('warn message')

logger.error('error message')

logger.critical('critical message')