如何自定义Python日志记录的时间格式? [英] How to Customize the time format for Python logging?

问题描述

我是Python日志记录包的新手，并计划将其用于我的项目.我想根据自己的喜好自定义时间格式.这是我从教程中复制的简短代码:

I am new to Python's logging package and plan to use it for my project. I would like to customize the time format to my taste. Here is a short code I copied from a tutorial:

import logging

# create logger
logger = logging.getLogger("logging_tryout2")
logger.setLevel(logging.DEBUG)

# create console handler and set level to debug
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)

# create formatter
formatter = logging.Formatter("%(asctime)s;%(levelname)s;%(message)s")

# add formatter to ch
ch.setFormatter(formatter)

# add ch to logger
logger.addHandler(ch)

# "application" code
logger.debug("debug message")
logger.info("info message")
logger.warn("warn message")
logger.error("error message")
logger.critical("critical message")

这是输出:

2010-07-10 10:46:28,811;DEBUG;debug message
2010-07-10 10:46:28,812;INFO;info message
2010-07-10 10:46:28,812;WARNING;warn message
2010-07-10 10:46:28,812;ERROR;error message
2010-07-10 10:46:28,813;CRITICAL;critical message

我想将时间格式缩短为:'2010-07-10 10:46:28'，删除毫秒后缀.我看着Formatter.formatTime，但是很困惑.感谢您为实现我的目标所提供的帮助.谢谢.

I would like to shorten the time format to just: '2010-07-10 10:46:28', dropping the mili-second suffix. I looked at the Formatter.formatTime, but confused. I appreciate your help to achieve my goal. Thank you.

推荐答案

来自

构造函数采用两个可选参数:消息格式字符串和日期格式字符串.

The constructor takes two optional arguments: a message format string and a date format string.

所以改变

# create formatter
formatter = logging.Formatter("%(asctime)s;%(levelname)s;%(message)s")

到

# create formatter
formatter = logging.Formatter("%(asctime)s;%(levelname)s;%(message)s",
                              "%Y-%m-%d %H:%M:%S")

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