如何在python中限制日志文件的大小

问题描述

我正在使用Windows 7和python 2.7.我想将日志文件大小限制为5MB.我的应用程序启动后，将其写入日志文件，然后该应用程序终止.当我的应用再次启动时，它将写入相同的日志文件.因此应用无法持续运行.应用程序启动，处理和终止.

I am using windows 7 and python 2.7.I want to limit my log file size to 5MB.My app, when it starts, writes to log file, and then the app terminates.When my app starts again, it will write in same log file. So app is not continuously running.App initiates, processes and terminates.

我的日志记录代码是:

import logging
import logging.handlers
logging.basicConfig(filename=logfile.log, level="info", format='%(asctime)s %(levelname)s %(funcName)s(%(lineno)d) %(message)s')
logging.info("*************************************************")

我尝试了 RotatingFileHandler ，但没有成功

logging.handlers.RotatingFileHandler(logFile, mode='a', maxBytes=5*1024*1024, backupCount=2, encoding=None, delay=0)

那么，如何在python中强制执行文件大小限制?

So, how can I enforce a file size limit in python?

推荐答案

丢失basicConfig()并尝试以下操作:

import logging
from logging.handlers import RotatingFileHandler

log_formatter = logging.Formatter('%(asctime)s %(levelname)s %(funcName)s(%(lineno)d) %(message)s')

logFile = 'C:\\Temp\\log'

my_handler = RotatingFileHandler(logFile, mode='a', maxBytes=5*1024*1024,
                                 backupCount=2, encoding=None, delay=0)
my_handler.setFormatter(log_formatter)
my_handler.setLevel(logging.INFO)

app_log = logging.getLogger('root')
app_log.setLevel(logging.INFO)

app_log.addHandler(my_handler)

while True:
    app_log.info("data")

这可以在我的机器上运行

This works on my machine

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