Modern Python Standard Library Cookbook

How to do it...

For this recipe, the steps are as follows:

1. The logging module allows us to easily set up the logging configuration through the basicConfig method:

>>> import logging, sys
>>> 
>>> logging.basicConfig(level=logging.INFO, stream=sys.stderr,
...                     format='%(asctime)s %(name)s %(levelname)s: %(message)s')
>>> log = logging.getLogger(__name__)

2. Now that our logger is properly configured, we can try using it:

>>> def dosum(a, b, count=1): ... log.info('Starting sum') ... if a == b == 0: ... log.warning('Will be just 0 for any count') ... res = (a + b) * count ... log.info('(%s + %s) * %s = %s' % (a, b, count, res)) ... print(res) ... >>> dosum(5, 3) 2018-02-11 22:07:59,870 __main__ INFO: Starting sum 2018-02-11 22:07:59,870 __main__ ...