PythonWin debugger holds onto global logging objects too long

Jean-Michel Pichavant jeanmichel at
Tue Feb 7 11:48:04 CET 2012

Vinay Sajip wrote:
> On Jan 24, 2:52 pm, Rob Richardson <RDRichard... at> wrote:
>> I use PythonWin to debug the Python scripts we write.  Our scripts often use the log2pyloggingpackage.  When running the scripts inside the debugger, we seem to get oneloggingobject for every time we run the script.  The result is that after running the script five times, the log file contains five copies of every message.  The only way I know to clean this up and get only a single copy of each message is to close PythonWin and restart it.
>> What do I have to do in my scripts to clean up theloggingobjects so that I never get more than one copy of each message in my log files?
> I don't know what log2py is - Google didn't show up anything that
> looked relevant. If you're talking about the logging package in the
> Python standard library, I may be able to help: but a simple script
> that I ran in PythonWin didn't show any problems, so you'll probably
> need to post a short script which demonstrates the problem when run in
> PythonWin.
> Regards,
> Vinay Sajip
Same here, can't find anything about log2py.
Anyway it's possible that your pythonwin does not spawn a clean python 
interpreter for every run, keeping the same one.

So you could possibly keep adding log handlers to your loggers because 
they may be static objects (like for the standard logging module).
One solution would be to empty your logger handler list before adding any.

I'm just guessing though, difficult to know without any info on log2py.


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