Python日志记录-将日期设置为文件名 [英] Python Logging - Set Date as Filename

问题描述

我正在努力在Python项目中实现日志记录，但遇到了一些麻烦.我试图设置日志记录，以便将处理程序和格式化程序全部组织到一个配置文件中.目前，我正在尝试设置fileHandler，以便它将创建一个类似于以下内容的日志文件:YYYY_MM_DD.log显然，Y代表年份，M代表月份，D代表一天.

I am working on implementing logging within my Python project and have hit a bit of a snag. I am trying to set up my logging such that the Handlers, and Formatters are all organized into a configuration file. What I am trying to do at the moment is to set up my fileHandler such that it will create a log file that looks something like this: YYYY_MM_DD.log obviously with the Y's representing the year, M's representing the month, and D's representing the day.

这是我尝试使用配置文件进行的操作:

This is what I have attempted with my config file:

[loggers]
keys=root,MainLogger

[handlers]
keys=fileHandler, consoleHandler

[formatters]
keys=logFormatter, consoleFormatter

[logger_root]
level=DEBUG
handlers=fileHandler

[logger_MainLogger]
level=DEBUG
handlers=fileHandler, consoleHandler
qualname=MainLogger
propagate=0

[handler_consoleHandler]
class=StreamHandler
level=DEBUG
formatter=consoleFormatter
args=(sys.stdout,)

[handler_fileHandler]
class=FileHandler
level=DEBUG
formatter=logFormatter
args=(datetime.now().strftime('%Y_%m_%d.log'), 'a')

[formatter_logFormatter]
format=%(asctime)s | %(levelname)-8s | %(lineno)04d | %(message)s

[formatter_consoleFormatter]
format=%(asctime)s | %(levelname)-8s | %(fillname)s-%(funcName)s-%(lineno)04d | %message)s

我用来测试配置的文件非常简单:

The file I am using to test the configuration is pretty simple:

import logging
import logging.config

logging.config.fileConfig('logging.conf')
logger = logging.getLogger('MainLogger')
logger.debug("TEST")

我目前遇到的具体错误是:

The specific error I am getting at the moment is:

configparser.InterpolationSyntaxError: '%' must be followed by '%' or '(', found: "%Y_%m_%d.log'), 'a')"

我已经尝试按照错误提示更改%Y，%m和%d，但这不能解决问题.我该如何设置配置文件，以使我的日志文件看起来像我希望的样子?

I've tried changing the %Y, %m, and %d as the error says, but that doesn't fix the problem. How do I go about setting up the config file so that my log files look the way I want them to?

当我将文件名更改为test.log时，我应该注意一切正常，因此这似乎是我唯一遇到的错误.

I should note when I change the filename to test.log everything worked fine, so this is the only error I seem to be having with this.

推荐答案

您无法在配置文件中使用datetime，因为它不知道这意味着什么.但是，您可以在python文件本身中添加Filehandler:

You can't use datetime in a config file, as it doesn't know what it means. You can however add the Filehandler in the python file itself:

import logging.config
from datetime import datetime

logging.config.fileConfig('aaa.conf')
logger = logging.getLogger('MainLogger')

fh = logging.FileHandler('{:%Y-%m-%d}.log'.format(datetime.now()))
formatter = logging.Formatter('%(asctime)s | %(levelname)-8s | %(lineno)04d | %(message)s')
fh.setFormatter(formatter)

logger.addHandler(fh)
logger.debug("TEST")

这样，您可以在处理程序中将日期设置为文件名.

This way you can set the date as the file name in the handler.

这是配置文件，请注意，您在最后一个格式化程序中输入了错字，您将fillname代替了filename，并且在message中忘记了(.

This is the config file, note that you had a typo in the last formatter, you put fillname instead of filename and you forgot ( in message.

[loggers]
keys=root,MainLogger

[handlers]
keys=consoleHandler

[formatters]
keys=consoleFormatter

[logger_root]
level=DEBUG
handlers=consoleHandler

[logger_MainLogger]
level=DEBUG
handlers=consoleHandler
qualname=MainLogger
propagate=0

[handler_consoleHandler]
class=StreamHandler
level=DEBUG
formatter=consoleFormatter
args=(sys.stdout,)

[formatter_consoleFormatter]
format=%(asctime)s | %(levelname)-8s | %(filename)s-%(funcName)s-%(lineno)04d | %(message)s

这应该工作正常.

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