Simplest Way To Set Up Python Logging To Stdout

I have the following to set up a basic logger to print output in a cron job: import logging log=logging.getLogger() log.setLevel(logging.DEBUG) log.addHandler(logging.StreamHandler

Solution 1:

If you just need to print the messages to the stdout, then logging.basicConfig is a handy shortcut for the configuration you listed. It will create a StreamHandler, attach the default Formatter to it and attach the handler to the root logger.

import logging

logging.basicConfig(level=logging.DEBUG, stream=sys.stdout)
logging.getLogger().info('hi')

Check out the docs for more configuration possibilities; for example,

logging.basicConfig(filename='some.log', level=logging.DEBUG)

will configure writing to file some.log instead of stdout.

Note that logging.basicConfig won't do a thing if the logger is already configured (meaning that there are handlers attached to the root logger already). So this code:

import logging

logging.getLogger().addHandler(logging.FileHandler(filename='some.log'))
logging.basicConfig(level=logging.DEBUG)

will not configure logging to stdout anymore; you will have to do it yourself.