python扩展了日志打印功能，感觉比java自带的还好，和log4j很类似。
先说一种不用配置文件的：
文件名：log.py
# -*- coding: gb2312 -*-
import logging
logging.basicConfig(level=logging.INFO,
format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
datefmt='%m-%d %H:%M',
filename='./AutoUpdate.log',
filemode='w')
console = logging.StreamHandler()
console.setLevel(logging.INFO)
formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
console.setFormatter(formatter)
logging.getLogger('').addHandler(console)
##
# console = logging.StreamHandler()
# console = setLevel(logging.DEBUG)
# formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
# console.setFormatter(formatter)
# logging.getLogger('').addHandler(console)
def getLogging(name):
return logging.getLogger(name)
文件名：test.py
import log
testlog = log.getLogging('test')
testlog.error( "~~~~~~~~~~~~~~test1.")
testlog.info( "~~~~~~~~~~~~~~test2." )
testlog.exception( "~~~~~~~~~~~~~~~~~~~~~~~~~test3.")
用过log4j的人不会陌生这种用法。如果你对log4j有疑惑，请参看相关文档。
第二种使用配置文件的：
# logging.conf
[loggers]
keys=root,example
[handlers]
keys=consoleHandler,rotateFileHandler
[formatters]
keys=simpleFormatter
[formatter_simpleFormatter]
format=[%(asctime)s](%(levelname)s)%(name)s : %(message)s
[logger_root]
level=DEBUG
handlers=consoleHandler,rotateFileHandler
[logger_example]
level=DEBUG
handlers=consoleHandler,rotateFileHandler
qualname=example
propagate=0
[handler_consoleHandler]
class=StreamHandler
level=DEBUG
formatter=simpleFormatter
args=(sys.stdout,)
[handler_rotateFileHandler]
class=handlers.RotatingFileHandler
level=DEBUG
formatter=simpleFormatter
args=('test.log', 'a', 10000, 9)
文件名：test2.py
import logging
import logging.config
logging.config.fileConfig("logger.conf")
#create logger
logger = logging.getLogger("example")
#"application" code
logger.debug("debug message")
logger.info("info message")
logger.warn("warn message")
logger.error("error message")
logger.critical("critical message")
logHello = logging.getLogger("hello")
logHello.info("Hello world!")
其中值得注意的是args的含义。