python 日志打印
发现python里面扩展了日志打印功能。感觉比java自带的还好，和log4j很类似。下面总结下其用法。先说一种不用配置文件的：
<log.py>
1# -*- coding: gb2312 -*-
2import logging
3
4logging.basicConfig(level=logging.INFO,
5 format='%(asctime)s %(name)-12s %(levelname)-8s %(message)s',
6 datefmt='%m-%d %H:%M',
7 filename='./AutoUpdate.log',
8 filemode='w')
9
10console = logging.StreamHandler()
11console.setLevel(logging.INFO)
12formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
13console.setFormatter(formatter)
14logging.getLogger('').addHandler(console)
15
16
17##
18# console = logging.StreamHandler()
19# console = setLevel(logging.DEBUG)
20# formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
21# console.setFormatter(formatter)
22# logging.getLogger('').addHandler(console)
23
24
25def getLogging(name):
26 return logging.getLogger(name)
<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，或者想了解请在本人blog内查找关于log4j的文章。有详细介绍。这里不再赘述。
第二种使用配置文件的：
# logging.conf
keys=root,example
keys=consoleHandler,rotateFileHandler
keys=simpleFormatter
format=[%(asctime)s](%(levelname)s)%(name)s : %(message)s
level=DEBUG
handlers=consoleHandler,rotateFileHandler
level=DEBUG
handlers=consoleHandler,rotateFileHandler
qualname=example
propagate=0
class=StreamHandler
level=DEBUG
formatter=simpleFormatter
args=(sys.stdout,)
class=handlers.RotatingFileHandler
level=DEBUG
formatter=simpleFormatter
args=('test.log', 'a', 10000, 9)
<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。
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