(beginner) logging config not working

[Peter Otten]

Unknown Moss wrote:

> Hi
> 
> This is a beginner question. Thanks for the hand.
> 
> I've been asked to maintain some poorly constructed python code.
> Logging is weak. Getting it to work with python logging
> programmatically was easy.
> 
> However, I'd like to refactor all the logging code into configuration
> since I see the need for other handlers in the future (syslog and
> possibly email).
> 
> For now I just want to get console and log file working, but I'm
> having problems with the log file. I'm trying some test code. Here's
> my test script (logging_example.py):
> 
> import logging
> import logging.config
> 
> def main():
>     logging.config.fileConfig("logging.conf")
>     logging.debug("debug check")

The above is a shortcut for

root = logging.getLogger("")
root.debug("debug check")

i. e. you are logging to the root logger. According to your config file 
messages sent to the root logger are only handled by the console handler:

> [logger_root]
> level=NOTSET
> handlers=console

You can either change that by adding the file handler to the list of 
handlers for the root logger

handlers=console,file
 
in the config file or by directing your logging messages to "mylogger" with

mylogger = logging.getLogger("mylogger")
mylogger.debug("debug check")

Note that loggers are organized in a tree; messages sent to mylogger will be 
propagated upwords to the root logger by default.