python LOG系统_python log 系统-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_42212319/article/details/82899004

本文详细介绍了一种自定义Python日志模块的实现方法，包括日志格式设置、终端及文件输出流配置、日志级别设定及日志回滚功能。通过具体代码示例，展示了如何创建一个既能输出到控制台又能写入文件的日志记录系统，适用于各种复杂的应用场景。

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#! /usr/bin/env python
# coding: utf-8
import os
import logging

class MyLogger(logging.Logger):
def __init__(self, filename='log/test.log',streamlevel=logging.DEBUG,filelevel=logging.INFO):
# super(MyLogger, self).__init__(filename)
logging.Logger.__init__(self, filename)

# 设置日志格式
fmtHandler = logging.Formatter('%(asctime)s [%(filename)s:%(lineno)s][%(levelname)s] %(message)s')

# 终端log输出流设置
try:
consoleHd = logging.StreamHandler()
consoleHd.setLevel(streamlevel)
consoleHd.setFormatter(fmtHandler)
self.addHandler(consoleHd)
except Exception as reason:
self.error("%s" % reason)

# 设置log文件
try:
os.makedirs(os.path.dirname(filename))
except Exception as reason:
pass
try:
fileHd = logging.FileHandler(filename)
fileHd.setLevel(filelevel)
fileHd.setFormatter(fmtHandler)
self.addHandler(fileHd)
except Exception as reason:
self.error("%s" % reason)
return
# 设置回滚日志,每个日志最大10M,最多备份5个日志
try:
rtfHandler = logging.BaseRotatingHandler(
filename, maxBytes=10*1024*1024, backupCount=5)
except Exception as reason:
self.error("%s" % reason)
else:
self.addHandler(rtfHandler)

def main():
logfile1 = 'log/test1.log'
logger1 = MyLogger(logfile1,logging.DEBUG,logging.INFO)
logger1.debug("debug msg")
logger1.info("info msg")
logger1.warning("warning msg")
logger1.error("error msg")
logger1.critical("critical msg")

logfile2 = 'log/test2.log'
logger1 = MyLogger(logfile2)
logger1.debug("debug msg")
logger1.info("info msg")
logger1.warning("warning msg")
logger1.error("error msg")
logger1.critical("critical msg")

if __name__ == '__main__':
main()