python 异步打印日志 python自动化日志打印

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 -*-
 2
import logging
 3

 4
logging.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

10
console = logging.StreamHandler()
11
console.setLevel(logging.INFO)
12
formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s')
13
console.setFormatter(formatter)
14
logging.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

25
def 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

[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)
<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!")