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!

"

)