Python8:logging Module
生活随笔
收集整理的這篇文章主要介紹了
Python8:logging Module
小編覺得挺不錯(cuò)的,現(xiàn)在分享給大家,幫大家做個(gè)參考.
1.打印到屏幕
import logging logging.debug('This is debug message') logging.info('This is info message') logging.warning('This is warning message')
2.logging.basicConfig對(duì)輸出格式及方式做配置
import logging logging.basicConfig(level=logging.DEBUG,format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',datefmt='%a, %d %b %Y %H:%M:%S',filename='myapp.log',filemode='w')logging.debug('This is debug message') logging.info('This is info message') logging.warning('This is warning message') ./myapp.log文件中內(nèi)容為:Sun, 24 May 2017 21:48:54 demo2.py[line:11] DEBUG This is debug message
Sun, 24 May 2017 21:48:54 demo2.py[line:12] INFO This is info message
Sun, 24 May 2017 21:48:54 demo2.py[line:13] WARNING This is warning message
logging.basicConfig函數(shù)各參數(shù):
filename: 指定日志文件名
filemode: 和file函數(shù)意義相同,指定日志文件的打開模式,'w'或'a'
format: 指定輸出的格式和內(nèi)容,format可以輸出很多有用信息,如上例所示:
?%(levelno)s: 打印日志級(jí)別的數(shù)值
?%(levelname)s: 打印日志級(jí)別名稱
?%(pathname)s: 打印當(dāng)前執(zhí)行程序的路徑,其實(shí)就是sys.argv[0]
?%(filename)s: 打印當(dāng)前執(zhí)行程序名
?%(funcName)s: 打印日志的當(dāng)前函數(shù)
?%(lineno)d: 打印日志的當(dāng)前行號(hào)
?%(asctime)s: 打印日志的時(shí)間
?%(thread)d: 打印線程ID
?%(threadName)s: 打印線程名稱
?%(process)d: 打印進(jìn)程ID
?%(message)s: 打印日志信息
datefmt: 指定時(shí)間格式,同time.strftime()
level: 設(shè)置日志級(jí)別,默認(rèn)為logging.WARNING
stream: 指定將日志的輸出流,可以指定輸出到sys.stderr,sys.stdout或者文件,默認(rèn)輸出到sys.stderr,當(dāng)stream和filename同時(shí)指定時(shí),stream被忽略
3.將日志同時(shí)輸出到文件和屏幕
import logging logging.basicConfig(level=logging.DEBUG,format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',datefmt='%a, %d %b %Y %H:%M:%S',filename='myapp.log',filemode='w') ################################################################################################# #定義一個(gè)StreamHandler,將INFO級(jí)別或更高的日志信息打印到標(biāo)準(zhǔn)錯(cuò)誤,并將其添加到當(dāng)前的日志處理對(duì)象# console = logging.StreamHandler() console.setLevel(logging.INFO) formatter = logging.Formatter('%(name)-12s: %(levelname)-8s %(message)s') console.setFormatter(formatter) logging.getLogger('').addHandler(console) ################################################################################################# logging.debug('This is debug message') logging.info('This is info message') logging.warning('This is warning message') 屏幕上打印:root ? ? ? ?: INFO ? ? This is info message
root ? ? ? ?: WARNING ?This is warning message
./myapp.log文件中內(nèi)容為:
Sun, 24 May 2017 21:48:54 demo2.py[line:11] DEBUG This is debug message
Sun, 24 May 2017 21:48:54 demo2.py[line:12] INFO This is info message
Sun, 24 May 2017 21:48:54 demo2.py[line:13] WARNING This is warning message
4.線程安全
http://blog.csdn.net/yatere/article/details/6655445總結(jié)
以上是生活随笔為你收集整理的Python8:logging Module的全部內(nèi)容,希望文章能夠幫你解決所遇到的問題。
- 上一篇: Python7:from module
- 下一篇: Python脚本-批量修改文件名