如何在 Python 中将 stdout 和 stderr 重定向到记录器

问题描述

我有一个带有 RotatingFileHandler 的记录器.我想将所有 Stdout 和 Stderr 重定向到记录器.怎么做?

I have a logger that has a RotatingFileHandler.I want to redirect all Stdout and Stderr to the logger.How to do so?

推荐答案

没有足够的代表发表评论，但我想添加对我有用的版本，以防其他人处于类似情况.

Not enough rep to comment, but I wanted to add the version of this that worked for me in case others are in a similar situation.

class LoggerWriter:
    def __init__(self, level):
        # self.level is really like using log.debug(message)
        # at least in my case
        self.level = level

    def write(self, message):
        # if statement reduces the amount of newlines that are
        # printed to the logger
        if message != '
':
            self.level(message)

    def flush(self):
        # create a flush method so things can be flushed when
        # the system wants to. Not sure if simply 'printing'
        # sys.stderr is the correct way to do it, but it seemed
        # to work properly for me.
        self.level(sys.stderr)

这看起来像:

log = logging.getLogger('foobar')
sys.stdout = LoggerWriter(log.debug)
sys.stderr = LoggerWriter(log.warning)

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