[Tutor] IOError: (0, 'Error')

[Bernard Lebel]

Hi Kent,

I'm checking out the logging module atm. I'm trying the second example
in "Basic example":


import logging

logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(levelname)s %(message)s',
                    filename='C:\\pylogger.log',
                    filemode='w')
logging.debug('A debug message')
logging.info('Some information')
logging.warning('A shot across the bows')


However when I run that I don't get any log file, while the doc page
says I should have a log file. Only the warning is printed, as if I
had not run the basicConfig method. Any suggestion?



Danny and Alan: thanks a lot for the suggestions, I have to say that
I'd prefer a text file instead of a database table, but I guess that
is just matter of habits. This could change.


Thanks
Bernard

On 1/2/06, Kent Johnson <kent37 at tds.net> wrote:
> Danny Yoo wrote:
> >>I think I see where you are going with this. Are you suggesting that
> >>both parent and child thread might be trying to write to the log at
> >>once, and one of them is closing the file while it is open for both?
> >
> >
> > Hi Bernard,
> >
> > One possibility is that we have a shared resource that needs some kind of
> > mutual exclusion.  If two threads try to append directly to the file, I
> > don't know what will happen, but the result will probably not be good.
> >
> >
> > But the Queue module can be especially useful here:
> >
> >     http://www.python.org/doc/lib/module-Queue.html
> >
> > The idea is that we keep a separate logger thread that reads messages off
> > a Queue instance.
>
> You might be interested in the standard logging module which is
> thread-safe and supports logging to a file, rather than inventing your own.
>
> Kent
>
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