importing python logging module settings

Question

I've got a python server that was using logging module. So far it was just:

logging.basicConfig(filename='server.log',level=logging.INFO,format='%(asctime)s\t%(levelname)s\t%(message)s')

Now I want to add few handlers to the logger. This is about 15 lines of code. I don't want to put it into the main server.py file to make it hold the most important server stuff. The question is - what is the suggested way to do this in python.

I have moved my logging handlers definitions into another module and have imported it:

import logdefs

but then this import is never used (I never use logdefs.something). Is that ok? Another question is - how does it work that logging module is loaded from a server.py's submodule and all the logging settings are available for the rest of its application (modifications are global instead of local)? Is all logging module content available as some kind of a singleton?

unutbu · Accepted Answer · 2014-01-27 14:27:12Z

1

Instead of calling logging.basicConfig, you could call

logging.config.fileConfig(config_file)

and place the configuration in a file.

For you second question, if you look at the logging/__init__.py source code, you'll see

root = RootLogger(WARNING)
Logger.root = root
Logger.manager = Manager(Logger.root)

This code gets called when logging is first imported. So when a submodule modifies or access the root logger, it is affecting or accessing the same root logger as the module that first imported logging.

edited Jan 27, 2014 at 14:27

answered Jan 27, 2014 at 14:20

unutbu

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