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From: Ian Kelly <ian.g.kelly@gmail.com>
Date: Wed, 18 Feb 2015 13:15:23 -0700
Subject: Re: Logging with Custom Levels not working
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Xref: csiph.com comp.lang.python:85818

On Wed, Feb 18, 2015 at 6:49 AM, Didymus <lynto28@gmail.com> wrote:
> def perror(self, message, *args, **kws):
>     """ Performance Error Message Level """
>     # Yes, logger takes its '*args' as 'args'.
>     self._log(PERROR_NUM, message, args, **kws)
>
> logging.Logger.perror = perror

I think you need to call self.log, not self._log. The _log method
appears to assume that the level check has already been performed. You
really shouldn't be calling it directly anyway, as the leading _ is an
indication that the method is not part of the public API.