将计数器传递给每个python日志记录方法 [英] Pass a counter to every python logging method

问题描述

可以将python日志记录方法设置为打印每个事件的时间.但是，如果我使用自己的时间变量运行模拟，可以在记录器中使用它吗?

The python logging method can be set to print the time of each event. However if I am running a simulation with its own time variable can that be used in the logger?

日志记录格式化程序似乎没有为此提供的选项.我可以重载每个记录器功能吗?

The logging Formatter doesn't seem to have an option for that. Can I overload each of the logger functions?

我想要类似的东西

counter = 5
logging.debug("First Event")
counter += 2
logging.warn("Second Event")

生产

DEBUG: 5: First Event
WARNING: 7: Second Event

推荐答案

您可以使用

You could use a logging.Filter:

import logging

class ContextFilter(logging.Filter):
    def filter(self, record):
        record.count = counter
        return True

logging.basicConfig(
    level = logging.DEBUG,
    format = '%(levelname)-8s: %(count)s: %(message)s')
logger = logging.getLogger(__name__)
logger.addFilter(ContextFilter())

counter = 5
logger.debug('First Event')
counter += 2
logger.warning('Second Event')

收益

DEBUG   : 5: First Event
WARNING : 7: Second Event

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