Python logging

pylogging.py

import logging
logging.basicConfig(filename='example.log', level=logging.DEBUG)
logger = logging.getLogger(__name__)
logger.setLevel(logging.DEBUG)

# create console handler and set level to debug
ch = logging.StreamHandler()
ch.setLevel(logging.DEBUG)

# create formatter
formatter = logging.Formatter('%(asctime)s - %(name)s - %(levelname)s - %(message)s')

# add formatter to ch
ch.setFormatter(formatter)

# add ch to logger
logger.addHandler(ch)

class CalibrationCanvas:
    def draw(self):
        logger.debug('CalibrationCanvas.draw')
        # do some funky stuff
        # ...
    def update(self, model):
        if not model:
            logger.warning('update: No model specified')

cc = CalibrationCanvas()
cc.draw()
cc.update(None)