首页 > 解决方案 > 如何避免 Python 中臃肿的日志文件?

问题描述

我的脚本每 5 秒执行一次。错误记录到文件中。这意味着,如果出现错误,日志文件每 5 秒就会因相同的错误而膨胀

while True:
    try:
        i_might_fail()   # As long as this line fails...
    except Exception as ex:
        logger.error(ex) # ... the log file gets bloated
    time.sleep(5)

终止脚本是不可能的。它必须每 5 秒重试一次。

我正在寻找一个日志功能来忽略 x 分钟的相同异常

logger.ignore_duplicates_for(10, 'minutes')

任何想法?提前致谢!

标签: pythonpython-3.xexceptionlogging

解决方案


这个特性可以这样实现:

import logging
import time
import datetime

logger = logging.getLogger(__file__)


TIMEDELTA = datetime.timedelta(seconds=5)


def error_without_duplicates(self, msg, *args, **kwargs):
    if not hasattr(self, 'msg_cache'):
        self.msg_cache = {}
    str_msg = str(msg)
    now = datetime.datetime.utcnow()
    if str_msg not in self.msg_cache:
        self.error(msg, *args, **kwargs)
        self.msg_cache[str_msg] = now
    elif now - self.msg_cache[str_msg] > TIMEDELTA:
        self.error(msg, *args, **kwargs)
        self.msg_cache[str_msg] = now


logging.Logger.error_without_duplicates = error_without_duplicates


while True:
    try:
        a = 1 /0
    except Exception as ex:
        logger.error_without_duplicates(ex)  # every 5 seconds, not 1
    time.sleep(1)

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