Python logging with multiple module imports

Question

I'm trying to establish logging in all modules I'm using. My project structure is

# driver.py import logging logger = logging.getLogger(__name__) class driver: ....

# driver_wrapper.py from driver import driver device = driver(...) def driver_func(): logging.info("...") ....

# main.py import logging import driver_wrapper logging.basicConfig(stream=sys.stdout, level=logging.WARNING) driver_wrapper.driver_func()

My problem now is that I still get INFO level messages and also the output is 'INFO:root'. But I would expect the module name instead of root.

Is there a way to set the logging level in the main.py for all modules or is it already correct how I do it? There are a lot of posts about this problem but the solutions don't seem to work for me.

Vinay Sajip · Accepted Answer · 2022-08-27 16:23:29Z

All your modules that use logging should have the logger = logging.getLogger(__name__) line, and thereafter you always log to e.g.logger.info(...), and never call e.g. logging.info(...). The latter is equivalent to logging to the root logger, not the module's logger. That "all your modules" includes driver_wrapper.py in your example.

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